/* ===== 2025 Modern Design - NADE ===== */

/* CSS Variables */
:root {
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

    /* Light theme - Clean neutral gray/white/black */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e5e5e5;
    --bg-elevated: #ffffff;

    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-tertiary: #999999;

    --border-primary: #e0e0e0;
    --border-secondary: #cccccc;

    --accent-primary: #1e293b;
    --accent-hover: #0f172a;
    --accent-light: #f1f5f9;

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --crisis: #dc2626;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15);

    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    --sidebar-width: 280px;
    --header-height: 64px;

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #020617;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --bg-elevated: #0f172a;
    --bg-hover: #0a0f1e;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;

    --border-primary: #1e293b;
    --border-secondary: #334155;

    --accent-primary: #cbd5e1;
    --accent-hover: #f1f5f9;
    --accent-light: #334155;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.7);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.8);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    overflow-x: hidden;
    transition: background var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; font-weight: 700; }
h2 { font-size: 2rem; font-weight: 600; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p { margin-bottom: 1rem; }

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-hover);
}

/* Top Header Bar */
.top-header {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--header-height);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    gap: 1rem;
    z-index: 90;
    transition: left var(--transition-base);
}

.header-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    align-items: center;
    justify-content: center;
}

.header-menu-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .header-menu-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.header-title {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-elevated);
    border-right: 1px solid var(--border-primary);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-base);
}

.sidebar-header {
    height: var(--header-height);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-primary);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.75rem;
}

.sidebar-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .sidebar-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: left;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: 0.25rem;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

[data-theme="dark"] .nav-item.active {
    background: var(--accent-light);
    color: var(--accent-primary);
}

.nav-icon {
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-primary);
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    transition: margin-left var(--transition-base);
}

.page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page Header */
.page-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-primary);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.03em;
}

.page-intro {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 1rem;
    padding-left: 1rem;
    border-left: 3px solid var(--accent-primary);
}

.page-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.page-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* Cards */
.card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: 1.25rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Behavior Items */
.behavior-section {
    margin-bottom: 2.5rem;
}

.behavior-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.behavior-grid {
    display: grid;
    gap: 1rem;
}

.behavior-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    transition: all var(--transition-base);
    position: relative;
}

.behavior-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

.behavior-card.checked {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--bg-elevated) 100%);
    border-color: var(--accent-primary);
}

.behavior-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.behavior-ref {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
}

.behavior-text {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.behavior-description {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-style: italic;
}

.behavior-example {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0.25rem;
}

.behavior-example strong {
    color: var(--accent-primary);
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.behavior-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.action-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
    margin: 0 0.5rem 0 0;
}

.action-icon:hover {
    color: var(--text-primary);
}

.action-icon.active {
    color: var(--accent-primary);
}

.action-icon svg {
    flex-shrink: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--border-secondary);
}

[data-theme="dark"] .btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-primary);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-success {
    background: var(--success);
    color: white;
}

.icon-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
}

.icon-btn:hover {
    color: var(--text-primary);
}

.icon-btn.crisis-btn:hover {
    color: var(--crisis);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--danger);
    color: white;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Modals */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.show {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

.modal-dialog {
    position: relative;
    width: 100%;
    max-width: 500px;
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-large .modal-dialog {
    max-width: 700px;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-primary);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

textarea,
input[type="text"],
select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

textarea:focus,
input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-light);
}

/* Theme Toggle */
.theme-selector {
    display: flex;
    gap: 0.5rem;
}

.theme-option {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border: 1px solid var(--border-primary);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-option:hover {
    border-color: var(--accent-primary);
}

.theme-option.active {
    background: var(--accent-light);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.theme-icon.hidden {
    display: none;
}

/* Settings */
.settings-section {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-primary);
}

.settings-section:last-child {
    border-bottom: none;
}

.settings-section h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.help-text {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
}

/* Crisis Resources */
.crisis-content {
    max-height: 60vh;
}

.crisis-section {
    margin-bottom: 2rem;
}

.crisis-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.crisis-card {
    background: var(--bg-secondary);
    border-left: 3px solid var(--crisis);
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
}

.crisis-card strong {
    display: block;
    margin-bottom: 0.5rem;
}

.crisis-card a {
    color: var(--accent-primary);
    font-weight: 600;
}

.alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-top: 1rem;
}

.alert-warning {
    background: #fef3c7;
    border: 1px solid #f59e0b;
    color: #78350f;
}

[data-theme="dark"] .alert-warning {
    background: #78350f;
    border: 1px solid #f59e0b;
    color: #fef3c7;
}

/* Notes & Videos */
.note-card,
.video-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.note-header,
.video-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.note-date {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.note-text {
    white-space: pre-wrap;
    line-height: 1.6;
}

.delete-btn {
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.delete-btn:hover {
    background: #dc2626;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-base);
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--success);
    color: white;
}

.toast.error {
    background: var(--danger);
    color: white;
}

/* Spinner */
.spinner-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.spinner-overlay.hidden {
    display: none;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Home Page Specific Styles */
.home-hero {
    text-align: left;
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.home-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.home-hero h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    margin-top: 2rem;
}

.home-hero p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.home-hero ul,
.home-hero ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.home-hero li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.home-hero hr {
    margin: 2rem 0;
    border: none;
    border-top: 1px solid var(--border-primary);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all var(--transition-base);
}

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

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    z-index: 90;
    transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

[data-theme="dark"] .mobile-menu-btn:hover {
    background: var(--bg-hover);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Responsive */
@media (max-width: 968px) {
    .top-header {
        left: 0;
    }

    .header-menu-btn {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        box-shadow: none;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }

    .sidebar-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
    }

    .page {
        padding: 1.5rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .home-hero h1 {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .page {
        padding: 1rem;
    }

    .page-title {
        font-size: 1.75rem;
    }

    .sidebar-footer {
        flex-wrap: nowrap;
        gap: 0.75rem;
    }

    .modal-dialog {
        margin: 0.5rem;
    }

    .toast {
        bottom: 1rem;
        right: 1rem;
        left: 1rem;
    }

    .action-icon {
        margin: 0 0.35rem 0 0;
    }

    .behavior-actions {
        gap: 0.5rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}