:root {
    --primary: #1a4731;
    --primary-light: #2a5741;
    --secondary: #2d6a4f;
    --accent: #40916c;
    --gold: #d4a373;
    --cream: #faf6f1;
    --dark: #1b4332;
    --background: linear-gradient(135deg, #f8fffe 0%, #f1f5f3 50%, #eef3f1 100%);
    --text-color: #1f2937;
    --text-light: #f1faee;
    --danger: #e76f51;
    --warning: #fca311;
    --success: #52b788;
    --shadow: 0 8px 32px rgba(26, 71, 49, 0.08);
    --shadow-hover: 0 16px 48px rgba(26, 71, 49, 0.12);
    --card-shadow: 0 20px 60px rgba(26, 71, 49, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --fast-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 24px;
    --border-radius-sm: 16px;
    --border-radius-xs: 12px;
    --glow: 0 0 32px rgba(64, 145, 108, 0.25);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(235, 235, 235, 0.6);
    --input-border: rgba(0, 0, 0, 0.08);
}

body.dark-mode {
    --primary: #52b788;
    --primary-light: #40916c;
    --secondary: #2d6a4f;
    --accent: #b7e4c7;
    --gold: #f4d35e;
    --dark: #edf2f4;
    --background: linear-gradient(135deg, #1d2d27 0%, #15201b 50%, #101815 100%);
    --text-color: #e2e8f0;
    --text-light: #1d2d27;
    --danger: #f28482;
    --warning: #fca311;
    --success: #80ed99;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.3);
    --card-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --input-border: rgba(255, 255, 255, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: clamp(14px, 1.2vw, 16px);
    scroll-behavior: smooth;
}

body {
    font-family: 'Tajawal', 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.7;
    position: relative;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
    direction: rtl;
    text-align: right;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 10%, rgba(64, 145, 108, 0.06) 0%, transparent 40%),
        radial-gradient(ellipse at 80% 90%, rgba(212, 163, 115, 0.04) 0%, transparent 40%),
        radial-gradient(ellipse at 40% 60%, rgba(26, 71, 49, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    width: min(95%, 1440px);
    margin: 0 auto;
    padding: clamp(2rem, 5vw, 4rem) clamp(1rem, 3vw, 2rem);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.btn {
    padding: clamp(0.8rem, 2vw, 1.2rem) clamp(1.8rem, 4vw, 3.2rem);
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    font-family: inherit;
}

.btn::before {
    content: "";
    position: absolute;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: right 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover::before {
    right: 100%;
}

.btn:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn:active, .btn.active {
    transform: translateY(2px) scale(0.98);
    box-shadow: 0 4px 16px rgba(26, 71, 49, 0.08);
}

.btn .spinner {
    animation: spin 1s linear infinite;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--text-light);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
    color: var(--text-light);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--accent) 0%, #52b788 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #c04c30 100%);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #c04c30 0%, #a53e26 100%);
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(231, 111, 81, 0.25);
}

header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.06);
    padding: clamp(1rem, 2vw, 1.5rem) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: min(95%, 1440px);
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo svg {
    color: var(--primary);
    width: 28px;
    height: 28px;
}

.logo span {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--primary);
    font-family: 'Tajawal', 'Poppins', sans-serif;
    transition: var(--transition);
}

.logo:hover span {
    color: var(--accent);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: clamp(0.5rem, 2vw, 1rem);
}

#header-back-btn {
    background: transparent;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--fast-transition);
    margin-left: 0.5rem;
}

#header-back-btn:hover {
    background-color: var(--glass-border);
}

.user-menu, .notification-menu {
    position: relative;
}

#user-menu-btn, #notification-btn {
    background: transparent;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
    transition: var(--fast-transition);
    position: relative;
}

#user-menu-btn:hover, #notification-btn:hover {
    background: var(--glass-border);
    transform: translateY(-1px);
}

.user-dropdown, .notification-dropdown {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--card-shadow);
    padding: 0.75rem;
    z-index: 1001;
    display: none;
    flex-direction: column;
    min-width: 240px;
    border: 1px solid var(--glass-border);
}

.user-menu.open .user-dropdown,
.notification-menu.open .notification-dropdown {
    display: flex;
    animation: fadeInScale 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.user-dropdown a,
.user-dropdown button {
    text-align: right;
    background: none;
    border: none;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-radius: var(--border-radius-xs);
    cursor: pointer;
    transition: var(--fast-transition);
    font-size: 0.95rem;
    color: var(--text-color);
    text-decoration: none;
    font-family: inherit;
}

.user-dropdown a:hover,
.user-dropdown button:hover {
    background-color: var(--glass-border);
    color: var(--primary);
    transform: translateX(-4px);
}

.user-dropdown .dropdown-header {
    padding: 1rem 1.25rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

#logout-btn {
    color: var(--danger) !important;
    font-weight: 600;
}

#logout-btn:hover {
    background-color: rgba(231, 111, 81, 0.1) !important;
}

.audio-settings {
    padding: 0.75rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--glass-border);
}

.audio-toggle-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
}

.volume-slider-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--primary);
}

input:checked+.slider:before {
    transform: translateX(20px);
}

.slider.round {
    border-radius: 24px;
}

.slider.round:before {
    border-radius: 50%;
}

#volume-slider {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--glass-border);
    border-radius: 3px;
    outline: none;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    cursor: pointer;
    border-radius: 50%;
}

#volume-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary);
    cursor: pointer;
    border-radius: 50%;
}

.notification-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--danger);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 11px;
    font-weight: 700;
    display: none;
    align-items: center;
    justify-content: center;
}

.notification-item {
    padding: 1rem;
    border-radius: var(--border-radius-xs);
    cursor: pointer;
    text-align: right;
    transition: var(--fast-transition);
    position: relative;
    padding-left: 40px; 
}

.notification-item:hover {
    background-color: var(--glass-border);
}

.notification-item-close-btn {
    position: absolute;
    top: 5px;
    left: 8px; 
    background: none;
    border: none;
    font-size: 1.6rem; 
    font-weight: bold;
    line-height: 1;
    color: var(--text-color);
    cursor: pointer;
    opacity: 0.4;
    transition: opacity 0.2s ease;
}

.notification-item-close-btn:hover {
    opacity: 0.9;
}

.no-notifications {
    padding: 1.5rem;
    text-align: center;
    opacity: 0.6;
}

.screen {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    animation: screenFadeIn 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    width: 100%;
    flex-grow: 1;
}

.screen.active {
    display: flex;
}

.screen h2 {
    margin-bottom: 2.5rem;
    color: var(--primary);
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-family: 'Tajawal', 'Poppins', sans-serif;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    font-weight: 800;
}

.screen h2::after {
    content: "";
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    border-radius: 2px;
}

#auth-screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
}

.auth-screen-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    width: 100%;
    max-width: 520px;
}

.app-description {
    text-align: right;
    width: 100%;
}

.description-wrapper {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.app-description-content {
    font-size: 0.9rem;
    line-height: 1.6;
    transition: max-height 0.5s ease-in-out;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.app-description-content.expanded {
    max-height: 300px;
    white-space: normal;
}

#read-more-btn {
    background: none;
    border: none;
    color: var(--primary);
    font-weight: 700;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

.card-container {
    max-width: 520px;
    width: 100%;
    background: var(--glass-bg);
    padding: clamp(2rem, 5vw, 3.5rem);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid var(--glass-border);
}

.auth-tabs, .account-tabs {
    display: flex;
    border-bottom: 2px solid var(--glass-border);
    margin-bottom: 2rem;
}

.auth-tab, .account-tab {
    flex: 1;
    padding: 1.25rem;
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    opacity: 0.7;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    font-weight: 600;
    font-family: inherit;
}

.auth-tab.active, .account-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    opacity: 1;
}

.account-tab {
    font-family: 'Tajawal', sans-serif;
}

.auth-form, .account-form-panel {
    display: none;
    flex-direction: column;
    gap: 1.25rem;
}

.auth-form.active, .account-form-panel.active {
    display: flex;
}

.auth-form.active {
    animation: fadeInUp 0.4s ease-out;
}

.input-group {
    text-align: right;
    position: relative;
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.input-field {
    width: 100%;
    padding: 1.25rem 1.5rem;
    font-size: 1rem;
    border: 2px solid var(--input-border);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    background-color: var(--cream); 
    font-family: inherit;
    color: var(--text-color);
    text-align: right;
}

.input-field:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(26, 71, 49, 0.12);
    outline: none;
}

input[type="email"],
input[type="password"],
input[inputmode="numeric"],
input[dir="ltr"] {
    direction: ltr !important;
    text-align: left !important; 
    unicode-bidi: bidi-override;
}

input[type="email"]:placeholder-shown,
input[type="password"]:placeholder-shown {
    direction: rtl !important;
    text-align: right !important;
}

.password-wrapper {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
}

.password-wrapper .input-field {
    padding-left: 48px !important;  
    padding-right: 40px !important; 
}

.toggle-password {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 48px;
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary);
    padding: 0;
}

.toggle-password .icon-eye-off {
    display: none;
}

.password-strength-container {
    display: none;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
    transition: all 0.3s ease;
}

.password-strength-bar-container {
    flex-grow: 1;
    height: 6px;
    background-color: var(--glass-border);
    border-radius: 3px;
    overflow: hidden;
}

.password-strength-bar {
    height: 100%;
    width: 0;
    border-radius: 3px;
    transition: width 0.3s ease-in-out, background-color 0.3s ease-in-out;
}

.password-strength-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-color);
    flex-shrink: 0;
}

.message-box {
    font-weight: 600;
    padding: 1.25rem;
    border-radius: var(--border-radius-sm);
    display: none;
    animation: fadeInUp 0.3s;
}

.message-box.success {
    color: #0f5132;
    background: rgba(212, 237, 218, 0.9);
}

.message-box.error {
    color: #58151c;
    background: rgba(248, 215, 218, 0.9);
}

.forgot-password-link {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.forgot-password-link a {
    color: var(--secondary);
    text-decoration: none;
}

.forgot-password-link a:hover {
    color: var(--primary);
}

.remember-me-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dialect-choice-container, .lesson-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    width: 100%;
}

.dialect-choice-container .btn {
    width: 100%;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
}

.search-bar-container {
    margin-bottom: 2rem;
    max-width: 600px;
    width: 100%;
    margin-inline: auto;
}

.flashcard-widget .card-area {
    perspective: 1500px;
    padding: 1rem;
}

.flashcard-ui .card-container-inner {
    position: relative;
    width: 100%;
    min-height: 350px;
    transition: transform 0.7s cubic-bezier(0.4, 0.0, 0.2, 1), box-shadow 0.3s ease;
    transform-style: preserve-3d;
    border-radius: var(--border-radius);
    background: radial-gradient(circle, #ffffff 0%, var(--cream) 100%);
    box-shadow: 0 4px 10px rgba(26, 71, 49, 0.05), 0 15px 40px rgba(26, 71, 49, 0.1);
    border: 1px solid rgba(0, 0, 0, 0.08);
}

.flashcard-ui .card-container-inner:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(26, 71, 49, 0.08), 0 25px 50px rgba(26, 71, 49, 0.15);
}

.flashcard-ui .card-container-inner.is-flipped {
    transform: rotateY(-180deg);
}

.flashcard-ui .card-container-inner.is-flipped:hover {
    transform: translateY(-5px) rotateY(-180deg);
}

.flashcard-ui .card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    padding: clamp(1.5rem, 5vw, 2.5rem);
    border-radius: var(--border-radius);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    text-align: center;
}

.flashcard-ui .card-back {
    transform: rotateY(180deg);
}

.card-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: absolute;
    top: 20px;
    left: 0;
    padding: 0 25px;
}

.lesson-title-display, .card-face-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-color);
    background-color: var(--glass-border);
    padding: 6px 14px;
    border-radius: 20px;
    opacity: 0.8;
}

#play-audio-btn {
    width: 48px;
    height: 48px;
    background: linear-gradient(145deg, rgba(255,255,255,0.8), rgba(230,230,230,0.8));
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: all 0.2s cubic-bezier(0.4, 0.0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    will-change: transform;
}

#play-audio-btn:hover {
    background-color: var(--primary);
    color: white;
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-hover);
}

#play-audio-btn:active {
    transform: scale(1.0);
}

#play-audio-btn svg {
    width: 22px;
    height: 22px;
}

.card-body-content {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.card-phrase {
    font-family: 'Tajawal', 'Poppins', sans-serif;
    font-size: clamp(2.8rem, 8vw, 4.5rem); 
    font-weight: 800;
    line-height: 1.4;
    margin: 0;
    background: linear-gradient(135deg, var(--primary) 30%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    padding-bottom: 0.5rem;
   border-bottom: none !important;
  text-decoration: none !important;
}

.card-phrase::after,
.card-phrase::before {
  display: none !important;
}

#card-dialect-text {
    direction: ltr;
}

.card-phrase[lang="ar"] {
    font-size: clamp(2.8rem, 8vw, 4.2rem);
    font-weight: 700;
}


.flip-instruction {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: #999;
  font-size: 0.8rem;
  opacity: 0.8;
}

.flip-instruction-placeholder {
    height: 24px;
}

.difficulty-buttons-on-card {
    display: flex;
    gap: 1rem;
    width: 100%;
    max-width: 480px;
    margin: 1.5rem auto 0;
    padding: 0 1rem;
    animation: fadeInUp 0.5s 0.2s cubic-bezier(0.4, 0.0, 0.2, 1) backwards;
}

.btn-difficulty {
    flex: 1;
    padding: 1rem 0.5rem;
    border: none;
    border-radius: 14px;
    cursor: pointer;
    font-weight: 700;
    font-size: clamp(0.9rem, 2vw, 1rem);
    color: white;
    font-family: 'Tajawal', sans-serif;
    transition: transform 0.15s ease-out, box-shadow 0.15s ease-out;
    will-change: transform;
}

.btn-difficulty:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}

.btn-difficulty:active {
    transform: translateY(0px);
}

.btn-difficulty span {
    display: block;
    margin-bottom: 2px;
}

.btn-difficulty[data-difficulty="again"] {
    background: linear-gradient(to top, #d97706, #f59e0b);
    box-shadow: 0 4px 0 0 #b45309;
}

.btn-difficulty[data-difficulty="again"]:hover {
    background: linear-gradient(to top, #e08110, #ffb02b);
}

.btn-difficulty[data-difficulty="hard"] {
    background: linear-gradient(to top, #dc2626, #ef4444);
    box-shadow: 0 4px 0 0 #b91c1c;
}

.btn-difficulty[data-difficulty="hard"]:hover {
    background: linear-gradient(to top, #e23535, #ff5353);
}

.btn-difficulty[data-difficulty="medium"] {
    background: linear-gradient(to top, #2563eb, #3b82f6);
    box-shadow: 0 4px 0 0 #1d4ed8;
}

.btn-difficulty[data-difficulty="medium"]:hover {
    background: linear-gradient(to top, #346ff1, #4a8cf9);
}

.btn-difficulty[data-difficulty="easy"] {
    background: linear-gradient(to top, #16a34a, #22c55e);
    box-shadow: 0 4px 0 0 #15803d;
}

.btn-difficulty[data-difficulty="easy"]:hover {
    background: linear-gradient(to top, #25b259, #31d46d);
}

.modal {
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
    animation: fadeInScale 0.4s ease-out;
}

.modal-content {
    background: var(--glass-bg);
    padding: clamp(2rem, 4vw, 3rem);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--card-shadow);
    max-width: 500px;
    width: 100%;
    text-align: center;
    position: relative;
    border: 1px solid var(--glass-border);
}

.close-modal {
    position: absolute;
    top: 15px;
    left: 20px;
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--text-color);
    opacity: 0.6;
    cursor: pointer;
    line-height: 1;
    background: transparent;
    border: none;
}

#revision-reminder-modal p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 1rem 0 1.5rem 0;
}

#price-gate-modal .modal-content {
    border-top: 4px solid var(--accent);
}

#price-gate-modal .modal-icon-wrapper {
    width: 60px;
    height: 60px;
    background: linear-gradient(145deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: -60px auto 15px auto;
    box-shadow: 0 8px 24px rgba(26, 71, 49, 0.2);
    border: 4px solid var(--glass-bg);
}

#price-gate-modal .modal-icon-wrapper svg {
    color: #fff;
}

#price-gate-modal .final-price {
    font-size: clamp(3.2rem, 12vw, 4rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#price-gate-modal .original-price {
    font-size: clamp(1.5rem, 6vw, 1.8rem);
    opacity: 0.4;
    text-decoration: line-through;
    text-decoration-color: var(--danger);
}

#price-gate-modal .benefits-list {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#price-gate-modal .benefits-list li {
    display: flex;
    align-items: center;
    gap: 10px;
}

#price-gate-modal .benefits-list svg {
    color: var(--success);
    flex-shrink: 0;
}

#price-gate-modal .modal-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

#price-gate-modal .modal-actions .btn {
    width: 100%;
}

#price-gate-modal #confirm-price-gate-btn {
    animation: pulse-animation 2s infinite;
}

#price-gate-modal #cancel-price-gate-btn {
    background: transparent;
    color: var(--secondary);
    box-shadow: none;
}

#toast-container {
    position: fixed;
    top: 10px; 
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    width: min(95%, 450px); 
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.toast {
    padding: 16px 24px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--card-shadow);
    color: white;
    font-weight: 600;
    opacity: 0;
    transform: translateX(calc(-100% - 20px));
    animation: slideInAndOutRTL 5s cubic-bezier(0.68, -0.55, 0.27, 1.55) forwards;
}

.toast.success {
    background: linear-gradient(135deg, var(--success), #2a9d8f);
}

.toast.error {
    background: linear-gradient(135deg, var(--danger), #c04c30);
}

.notification-popup-card {
    display: flex;
    align-items: flex-start; 
    gap: 1rem;
    background: var(--glass-bg);
    padding: 1.25rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    position: relative;
    animation: fadeInDown 0.5s cubic-bezier(0.25, 1, 0.5, 1);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.notification-popup-card.closing {
    opacity: 0;
    transform: translateY(-20px);
}

.notif-icon {
    flex-shrink: 0;
    color: var(--primary);
}

.notif-content strong {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 700;
    color: var(--text-color);
}

.notif-content p {
    margin: 0;
    line-height: 1.5;
    opacity: 0.8;
}

.notif-close-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--text-color);
    opacity: 0.5;
    transition: opacity 0.2s ease;
}

.notif-close-btn:hover {
    opacity: 1;
}

footer {
    background: linear-gradient(135deg, #1d2d27 0%, #101815 100%);
    color: var(--cream);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem 5%;
    text-align: center;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--cream);
    text-decoration: none;
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
}

.floating-home-btn {
    position: fixed;
    bottom: 25px;
    left: 25px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

#auth-screen.active .floating-home-btn {
    display: flex;
}

.navigation-popup-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.navigation-popup-buttons .btn {
    width: 100%;
}

.navigation-popup-buttons .btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    border-color: #bbb;
    transform: none;
    box-shadow: none;
}

.navigation-popup-buttons .btn:disabled:hover {
    background: #ccc;
}

.back-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    transition: var(--fast-transition);
}

.back-link:hover {
    background-color: var(--glass-border);
}

#lesson-search-input {
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
}

body.dark-mode #lesson-search-input {
    background-color: rgba(0, 0, 0, 0.2);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    width: 100%;
    max-width: 1200px;
}

.dashboard-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    text-align: right;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.card-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.8rem;
    background-color: var(--glass-border);
}

.card-content h3 {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-color);
    margin: 0;
}

.card-content p {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
    margin: 0.25rem 0 0 0;
    line-height: 1.4;
}

.dashboard-card.danger-action .card-content h3 {
    color: var(--danger);
}

.progress-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.summary-card {
    background: var(--glass-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
}

.summary-card h4 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary);
    margin: 0 0 0.5rem 0;
}

.summary-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.heatmap-title {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.heatmap-container {
    display: flex;
    justify-content: center;
    width: 100%;
    max-width: 800px;
    margin-inline: auto;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(15, 1fr);
    gap: 4px;
    width: 100%;
}

.heatmap-cell {
    width: 100%;
    aspect-ratio: 1 / 1;
    background-color: var(--glass-border);
    border-radius: 4px;
}

.heatmap-cell[data-level="1"] { background-color: #c6e48b; }
.heatmap-cell[data-level="2"] { background-color: #7bc96f; }
.heatmap-cell[data-level="3"] { background-color: #239a3b; }
.heatmap-cell[data-level="4"] { background-color: #196127; }

.word-popup-modal .modal-content {
    border-top: 4px solid var(--primary);
    text-align: right;
}

.word-popup-modal h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    direction: ltr; 
    text-align: right; 
    margin-bottom: 0.5rem;
}

.word-popup-modal .popup-translation {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--secondary);
    margin: 0.5rem 0;
}

.word-popup-modal .popup-note {
    font-size: 1rem;
    line-height: 1.6;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.lesson-category-title {
    grid-column: 1 / -1; 
    text-align: center;
    color: var(--primary);
    margin-top: 2rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.lesson-category-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.lesson-card {
    background: var(--glass-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    border-left: 6px solid var(--accent);
    text-align: right;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 160px;
}

.lesson-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--card-shadow);
    border-left-color: var(--primary);
}

.lesson-card.locked {
    opacity: 0.7;
    border-left-color: #ccc;
}

.lesson-card.locked:hover {
    transform: none;
    box-shadow: var(--shadow);
}

.lesson-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.lesson-number {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--primary);
}

.lock-icon, .lesson-type-icon {
    font-size: 1.2rem;
}

.lesson-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
    flex-grow: 1; 
}

.lesson-card-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.lesson-progress-container {
    flex-grow: 1;
    height: 8px;
    background-color: var(--glass-border);
    border-radius: 4px;
    overflow: hidden;
}

.lesson-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: 4px;
    transition: width 0.6s ease;
}

.lesson-progress-percentage {
    font-weight: 700;
    color: var(--primary);
    font-size: 0.9rem;
}

body.dark-mode .flashcard-ui .card-container-inner {
    background: radial-gradient(circle, #2c3e50 0%, #1e2a38 100%);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25), 0 0 20px rgba(183, 228, 199, 0.05);
    border: 1px solid var(--glass-border);
}

body.dark-mode .flashcard-ui .card-container-inner:hover {
     box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3), 0 0 30px rgba(183, 228, 199, 0.1);
}

body.dark-mode #play-audio-btn {
    background: rgba(255, 255, 255, 0.08);
    color: var(--accent);
}

body.dark-mode #play-audio-btn:hover {
    background: var(--primary);
    color: var(--text-light);
}

body.dark-mode .card-phrase {
    background: linear-gradient(135deg, #ffffff 30%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.dark-mode .card-phrase::after {
    background: linear-gradient(90deg, var(--gold), var(--accent));
}

body.dark-mode .word-popup-modal .modal-content {
    border-top-color: var(--accent);
}

body.dark-mode .word-popup-modal h3 {
    color: var(--accent);
}

body.dark-mode .word-popup-modal .popup-translation {
    color: var(--gold);
}

@keyframes fadeInScale {
    from { opacity: 0; transform: translateY(-8px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes screenFadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-animation {
    0% { box-shadow: 0 0 0 0 rgba(26, 71, 49, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(26, 71, 49, 0); }
    100% { box-shadow: 0 0 0 0 rgba(26, 71, 49, 0); }
}

@keyframes slideInAndOutRTL {
    5%, 80% { opacity: 1; transform: translateX(0); }
    95%, 100% { opacity: 0; transform: translateX(calc(-100% - 20px)); }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translate3d(0, -20px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.session-progress-bar-track {
    width: 100%;
    height: 12px;
    background-color: var(--glass-border);
    border-radius: 12px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
    overflow: hidden; 
}

.flashcard-ui {
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    flex-grow: 1;
}

.session-progress {
    width: 100%;
    max-width: 480px; 
    margin: 0 auto 2rem auto;
    padding: 0 1rem;
    animation: fadeInDown 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.session-progress-text {
    display: block;
    text-align: center;
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 0.75rem;
    letter-spacing: 1px;
}

.session-progress-bar-track {
    width: 100%;
    height: 8px; 
    background-color: var(--glass-border);
    border-radius: 8px;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.08);
    overflow: hidden;
}

.session-progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--accent), var(--primary));
    border-radius: 8px;
    transition: width 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.clickable-word {
    text-decoration: none;
    border-bottom: 3px dashed rgba(64, 145, 108, 0.4);
    cursor: pointer;
    padding-bottom: 4px;
    transition: all 0.2s ease;
}

.clickable-word:hover {
    color: var(--primary);
    background-color: var(--glass-border);
    border-bottom-style: solid;
    border-bottom-color: var(--primary);
}

body.dark-mode .session-progress-text {
    color: var(--accent);
}
body.dark-mode .session-progress-bar-fill {
     background: linear-gradient(90deg, var(--gold), var(--accent));
}
body.dark-mode .clickable-word {
    border-bottom-color: rgba(183, 228, 199, 0.5);
}
body.dark-mode .clickable-word:hover {
    border-bottom-color: var(--accent);
}

.btn-primary {
    color: #FFFFFF !important; 
}

.email-suggestion {
  font-size: 0.85rem;
  margin-top: 5px;
  text-align: right;
  height: 18px; 
}

.email-suggestion a {
  color: var(--primary);
  text-decoration: underline;
  cursor: pointer;
}

.input-field.is-invalid {
  border-color: var(--danger);
}
.input-field.is-valid {
  border-color: var(--success);
}
#email-validation-message {
  color: var(--danger);
  font-size: 0.8rem;
  text-align: right;
  margin-top: 4px;
  height: 16px;
}


.otp-inputs-container {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-top: 0.5rem;
    direction: ltr; 
}

.otp-digit-input {
    flex: 1;
    width: 100%;
    min-width: 0;
    max-width: 52px;
    height: 56px;
    font-size: 1.8rem;
    text-align: center;
    border: 2px solid var(--input-border);
    border-radius: var(--border-radius-xs);
    background: var(--glass-bg);
    color: var(--text-color);
    transition: var(--fast-transition);
    caret-color: var(--primary);
}

.otp-digit-input:focus {
    outline: none;
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 0 0 4px rgba(26, 71, 49, 0.12);
}

.otp-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 1.5rem;
    gap: 1rem;
    font-size: 0.9rem;
}

#otp-timer {
    font-weight: 600;
    color: var(--secondary);
}

.link-button {
    background: none;
    border: none;
    color: var(--primary);
    font-weight: 700;
    cursor: pointer;
    font-size: inherit;
    font-family: inherit;
    padding: 0;
    text-decoration: underline;
}

.link-button:disabled {
    color: var(--text-color);
    opacity: 0.5;
    cursor: not-allowed;
    text-decoration: none;
}

.resend-otp-container {
  text-align: right;
  margin-top: 1rem;
  font-size: 0.9rem;
}

.disabled-link {
  color: var(--text-color-secondary);
  pointer-events: none;
  text-decoration: none;
}

#resend-otp-timer {
  margin-right: 5px;
  font-weight: bold;
}

.input-group {
    position: relative;
}

.validation-icon {
    position: absolute;
    top: 50%;
    right: 12px; 
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
    pointer-events: none;
}

.input-field.validated ~ .validation-icon,
.input-field.invalid ~ .validation-icon {
    opacity: 1;
}

.validation-icon.success {
    color: var(--success);
}

.validation-icon.error {
    color: var(--danger);
}

.input-field.validated {
    border-color: var(--success);
}

.input-field.invalid {
    border-color: var(--danger);
}

.password-wrapper .validation-icon {
    left: auto;      
    right: 12px;     
    top: 50%;
    transform: translateY(-50%);
}

.consent-group.invalid label {
    color: var(--danger);
    font-weight: 600;
}
.consent-group.invalid input[type="checkbox"] {
    outline: 2px solid var(--danger);
    outline-offset: 2px;
    border-radius: 2px;
}

.btn:disabled {
    background: #ccc;
    color: #888;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 0.6;
}

.btn:disabled:hover {
    background: #ccc;
    transform: none;
    box-shadow: none;
}

.consent-group {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    margin-top: 0.4rem;
    text-align: right;
}

.consent-group label {
    font-size: 0.8rem;
    line-height: 1.4;
    color: var(--text-color);
    opacity: 0.8;
    cursor: pointer;
}

.consent-group input[type="checkbox"] {
    margin-top: 3px;
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

.input-wrapper {
    position: relative; 
}

.input-wrapper .validation-icon {
    top: 50%;
    right: 1.5rem; 
    transform: translateY(-50%);
}


#email-suggestion,
#email-validation-message {
  display: none;
  margin: 0;
  padding: 0;
}

#email-suggestion:not(:empty),
#email-validation-message:not(:empty) {
  display: block; 
}

.vocabulary-list-container {
    padding: 2rem 1rem;
    max-width: 900px;
    margin: auto;
}

.vocabulary-theme-title {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary);
}

.vocabulary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.vocabulary-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.vocab-word-malagasy {
    font-weight: bold;
    font-size: 1.2rem;
    color: var(--text-color);
}

.vocab-word-arabic {
    font-weight: bold;
    font-size: 1.3rem;
    color: var(--primary);
}

.vocab-word-note {
    font-size: 0.9rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    padding-top: 0.5rem;
    margin-top: 0.5rem;
}

.video-modal-content {
    width: 90vw; 
    max-width: 850px; 
    padding: 1.5rem;
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative; 
    animation: modal-fade-in 0.3s ease-out; 
}

#video-modal-title {
    margin: 0 0 1.5rem 0;
    padding-left: 2.5rem; 
    color: var(--primary);
    font-size: 1.4rem;
    font-weight: 700;
}

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; 
    background-color: #000; 
    border-radius: var(--border-radius-md);
    overflow: hidden; 
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none; 
}

#close-video-modal {
    position: absolute;
    top: 0.75rem;
    left: 1rem; 
    font-size: 2.5rem;
    font-weight: bold;
    line-height: 1;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s ease;
}

#close-video-modal:hover {
    color: var(--danger);
}

@keyframes modal-fade-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse-glow {
  0% {
    opacity: 0.7;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.03);
  }
  100% {
    opacity: 0.7;
    transform: scale(1);
  }
}

.flip-instruction.animated {
  animation: pulse-glow 2.5s infinite ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
    20%, 40%, 60%, 80% { transform: translateX(4px); }
}

.shake-animation {
    animation: shake 0.4s cubic-bezier(.36,.07,.19,.97) both;
}

.consent-group.shake-animation {
    border: 1px solid var(--danger);
    background-color: rgba(231, 111, 81, 0.05); 
    border-radius: var(--border-radius-xs);
    padding: 8px; 
}

/* --- OPTIMISATIONS TELEGRAM MINI APP --- */
body {
    overscroll-behavior-y: none;
    touch-action: manipulation;
    background-color: var(--tg-theme-bg-color, var(--background));
    color: var(--tg-theme-text-color, var(--text-color));
}

.container {
    padding-top: calc(clamp(2rem, 5vw, 4rem) + env(safe-area-inset-top));
    padding-bottom: calc(clamp(2rem, 5vw, 4rem) + env(safe-area-inset-bottom));
}

header {
    padding-top: calc(clamp(1rem, 2vw, 1.5rem) + env(safe-area-inset-top));
}

footer {
    padding-bottom: calc(2rem + env(safe-area-inset-bottom));
}

.floating-home-btn {
    display: none !important;
}

.btn, button, a {
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

main {
    padding-bottom: 20px; 
}

.auth-separator {
    display: flex;
    align-items: center;
    margin: 1.5rem 0 1rem 0;
    color: var(--secondary);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
}

.auth-separator::before,
.auth-separator::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

.auth-separator span {
    padding: 0 10px;
}

.btn-google {
    background: white;
    color: #333;
    border: 1px solid rgba(0,0,0,0.2);
    width: 100%;
    margin-bottom: 0.5rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: 'Tajawal', sans-serif; /* Important pour l'arabe */
}

.btn-google:hover {
    background: #f8f9fa;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.btn-google svg {
    flex-shrink: 0;
}

body.dark-mode .btn-google {
    background: #eee;
    color: #333;
    border: none;
}
body.dark-mode .btn-google:hover {
    background: #fff;
}

@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 600px) {
    #auth-screen.active {
        justify-content: center; 
        padding: 1rem 0.5rem;  
        overflow-y: auto;       
    }

    .auth-screen-wrapper {
        width: 100%;
        max-width: 100%;
        gap: 1rem; 
    }

    .card-container {
        padding: 1.5rem 1.2rem !important; 
    }

    body {
        font-size: 15px; 
    }

    .input-field {
        padding: 0.9rem 1.1rem !important;
        font-size: 16px; 
    }
    
    .btn {
        padding: 0.9rem !important;
        font-size: 1rem;
    }
    
    .auth-form {
        gap: 0.9rem !important;
    }

    .consent-group label, 
    .remember-me-group label {
        font-size: 0.8rem !important; /* Assez petit pour ne pas prendre trop de place */
    }

    .auth-separator {
        margin: 1rem 0 !important;
    }
}

@media (max-width: 420px) {
    .auth-form {
        gap: 0.7rem !important;
    }
    .input-field, .btn {
        padding: 0.8rem 1rem !important;
    }
    .auth-separator {
        margin: 0.8rem 0 !important;
    }
}