/* ===================================
   Study Syns - Main Stylesheet
   ================================== */

/* CSS Custom Properties (Unified Blue Theme) */
:root {
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --secondary-color: #3b82f6;
    --accent-color: #2563eb;
    --bg-primary: #FFFFFF;
    --bg-secondary: #f8fafc;
    --bg-card: #FFFFFF;
    --bg-input: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --text-inverse: #FFFFFF;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #06b6d4;
    --study-color: #3b82f6;
    --work-color: #f59e0b;
    --break-color: #10b981;
    --other-color: #60a5fa;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(37, 99, 235, 0.1);
    --shadow-lg: 0 8px 24px rgba(37, 99, 235, 0.15);
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --font-family: 'Cairo', sans-serif;
    --z-dropdown: 100;
    --z-modal: 200;
    --z-toast: 300;
    --z-nav: 50;
}

[data-theme="dark"] {
    --bg-primary: #0a1929;
    --bg-secondary: #0a1929;
    --bg-card: #1e3a5f;
    --bg-input: #132f4c;
    --text-primary: #e3f2fd;
    --text-secondary: #bbdefb;
    --text-light: #7da8c9;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    min-height: 100vh;
    direction: rtl;
    padding-bottom: 80px;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    color: var(--text-main) !important;
}

::placeholder {
    color: var(--text-muted) !important;
    opacity: 0.8;
}

ul,
ol {
    list-style: none;
}

/* Header */
.main-header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 24px;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color) !important;
    background: none !important;
    -webkit-text-fill-color: initial !important;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.theme-toggle:hover {
    background: var(--primary-light);
    color: var(--text-inverse);
}

.api-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-input);
    border-radius: var(--radius-full);
    font-size: 14px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1
    }

    50% {
        opacity: 0.5
    }
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
}

.back-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.back-btn:hover {
    background: var(--bg-input);
}

.page-title {
    font-size: 18px;
    font-weight: 600;
}

.header-spacer {
    width: 40px;
}

/* Hero */
.hero {
    background: var(--primary-gradient);
    color: var(--text-inverse);
    padding: var(--spacing-2xl) var(--spacing-md);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 14px;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, #FFD54F, #FFA726);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 16px;
    opacity: 0.9;
}

.floating-icon {
    position: absolute;
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
    opacity: 0.6;
}

.icon-1 {
    top: 10%;
    left: 10%;
}

.icon-2 {
    top: 20%;
    right: 15%;
    animation-delay: 0.5s;
}

.icon-3 {
    bottom: 20%;
    left: 5%;
    animation-delay: 1s;
}

.icon-4 {
    bottom: 10%;
    right: 10%;
    animation-delay: 1.5s;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0)
    }

    50% {
        transform: translateY(-15px)
    }
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

.page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

/* Cards */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.feature-card {
    position: relative;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.card-chat .card-icon-wrapper {
    background: rgba(103, 58, 183, 0.1);
}

.card-add .card-icon-wrapper {
    background: rgba(76, 175, 80, 0.1);
}

.card-schedule .card-icon-wrapper {
    background: rgba(33, 150, 243, 0.1);
}

.card-icon {
    font-size: 2rem;
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.card-arrow {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.feature-card:hover .card-arrow {
    background: var(--primary-color);
    color: var(--text-inverse);
}

/* Stats */
.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Bottom Nav */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    z-index: var(--z-nav);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xs);
    color: var(--text-secondary);
    min-width: 60px;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-icon {
    font-size: 1.25rem;
    margin-bottom: 2px;
}

.nav-label {
    font-size: 12px;
}

.nav-add {
    transform: translateY(-15px);
}

.nav-add .nav-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-size: 1.5rem;
    box-shadow: var(--shadow-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    min-height: 44px;
    transition: var(--transition-normal);
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-inverse);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-input);
    color: var(--text-primary);
}

.btn-danger {
    background: var(--error-color);
    color: var(--text-inverse);
}

/* Forms */
.form-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.required {
    color: var(--error-color);
}

.optional {
    color: var(--text-light);
    font-weight: 400;
    font-size: 14px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--bg-input);
    border-radius: var(--radius-md);
    background: var(--bg-input);
    transition: var(--transition-normal);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-primary);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-error {
    display: none;
    color: var(--error-color);
    font-size: 14px;
    margin-top: var(--spacing-xs);
}

.form-group.error .form-error {
    display: block;
}

.form-group.error .form-input {
    border-color: var(--error-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.form-slider {
    flex-grow: 1;
    -webkit-appearance: none;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--bg-input);
}

.form-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-gradient);
    cursor: pointer;
}

.duration-value {
    color: var(--primary-color);
    font-weight: 700;
}

.duration-presets {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.preset-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    background: var(--bg-input);
    font-size: 14px;
}

.preset-btn.active {
    background: var(--primary-color);
    color: var(--text-inverse);
}

/* Task Types */
.task-types {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.type-option {
    cursor: pointer;
}

.type-option input {
    display: none;
}

.type-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--bg-input);
    background: var(--bg-input);
}

.type-option input:checked+.type-card {
    border-color: var(--primary-color);
    background: rgba(103, 58, 183, 0.1);
}

.type-icon {
    font-size: 1.5rem;
}

.type-name {
    font-size: 14px;
    font-weight: 500;
}

/* Toggle */
.toggle-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
}

.toggle-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 28px;
}

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

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--text-light);
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: white;
    top: 3px;
    left: 3px;
    transition: var(--transition-normal);
}

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

.toggle-switch input:checked+.toggle-slider::before {
    transform: translateX(22px);
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
}

/* Reminder Options */
.reminder-section {
    margin-top: var(--spacing-sm);
}

.reminder-toggle {
    margin-bottom: var(--spacing-md);
}

.reminder-options {
    padding: var(--spacing-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-sm);
}

.sub-label {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.reminder-time-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.reminder-option {
    cursor: pointer;
}

.reminder-option input {
    display: none;
}

.reminder-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    background: var(--bg-card);
    border: 2px solid transparent;
    font-size: 13px;
    transition: var(--transition-normal);
}

.reminder-option:hover .reminder-badge {
    border-color: var(--primary-light);
}

.reminder-option input:checked+.reminder-badge {
    background: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
}

.custom-reminder-time {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-md);
}

.custom-reminder-time .form-input {
    width: 120px;
    padding: var(--spacing-sm);
}

.custom-time-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    padding: var(--spacing-md);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 100%;
    text-align: center;
    transform: scale(0.9);
    transition: var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.modal-content h3 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: var(--z-toast);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.toast.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast-success {
    border-right: 4px solid var(--success-color);
}

.toast-error {
    border-right: 4px solid var(--error-color);
}

/* Loading */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-2xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-input);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 24px;
    }

    .cards-container {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .task-types {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

    .floating-icon {
        display: none;
    }
}