/* ==========================================================================
   SeenLabs Premium Design System (Local - Solution Match Quiz)
   Glassmorphism, Gradients, and Micro-interactions
   ========================================================================== */

:root {
    /* Brand Gradients (Aurora) */
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #4f46e5 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
    --gradient-glass: linear-gradient(145deg, rgba(255,255,255,0.7), rgba(255,255,255,0.3));
    --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    
    /* Colors */
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #0ea5e9;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --bg-body: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    
    /* Spacing & Layout */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --container-max: 1000px;
    
    /* Effects */
    --shadow-sm: 0 4px 6px -1px rgba(0,0,0,0.05);
    --shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --blur: blur(12px);
    --anim-fast: 0.2s ease;
    --anim-med: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Layout Utilities */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 1.5rem; }
.text-center { text-align: center; }
.hidden { display: none !important; }
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: 1fr; }
@media(min-width: 768px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

/* ==========================================================================
   Components
   ========================================================================== */

/* Hero Section (Premium Mesh) */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: 6rem 1.5rem;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}
@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.hero p {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Cards (Glassmorphism) */
.card {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: transform var(--anim-med), box-shadow var(--anim-med);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-glass {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: var(--shadow-glass);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--anim-fast);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    letter-spacing: 0.01em;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* Quiz Options (Interactive Cards) */
.option-btn {
    width: 100%;
    text-align: left;
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    cursor: pointer;
    transition: all var(--anim-fast);
    position: relative;
    overflow: hidden;
}
.option-btn:hover {
    border-color: var(--primary);
    background: #fdfcff;
    transform: scale(1.02);
    box-shadow: var(--shadow-sm);
}
.option-btn span {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-main);
    display: block;
}
.option-btn .sub-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-top: 0.25rem;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease;
}
.modal-overlay.active {
    display: flex;
}
.modal-content {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-glass);
    text-align: center;
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-input {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    margin: 1rem 0;
    font-size: 1rem;
    transition: border-color 0.2s;
}
.modal-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Dark Mode Overrides */
[data-theme="dark"] {
    --bg-body: #0f172a;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --surface: #1e293b;
    --border: #334155;
    --primary: #818cf8; /* Lighter indigo for dark mode */
}

[data-theme="dark"] .option-btn {
    background: #334155;
    border-color: #475569;
}

[data-theme="dark"] .option-btn:hover {
    border-color: var(--primary);
    background: #1e293b;
}

[data-theme="dark"] .option-btn.selected {
    background: rgba(129, 140, 248, 0.2);
    border-color: var(--primary);
}
[data-theme="dark"] .option-btn span {
    color: var(--text-main);
}
[data-theme="dark"] .option-btn .sub-text {
    color: var(--text-muted);
}
[data-theme="dark"] .modal {
    background: var(--surface);
    border: 1px solid var(--border);
}

[data-theme="dark"] .form-input {
    background: #0f172a;
    border-color: #334155;
    color: var(--text-main);
}

[data-theme="dark"] .result-card {
    background: var(--surface);
    border-color: var(--border);
}

[data-theme="dark"] .recommendation-badge {
    background: rgba(129, 140, 248, 0.2);
    color: #c7d2fe;
}

/* Header Dark Mode fixes */
[data-theme="dark"] .header {
    background: var(--surface);
    border-bottom-color: var(--border);
}

[data-theme="dark"] .header__logo-img {
    filter: brightness(0) invert(1);
}

[data-theme="dark"] .header__brand {
    color: var(--text-main);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .btn--icon:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   Standard Header & Modals (Added Phase 7)
   ========================================================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.header__logo { display: flex; align-items: center; gap: 1rem; text-decoration: none; }
.header__logo-img { width: 36px; height: 36px; border-radius: 6px; }
.header__title-group { display: flex; flex-direction: column; gap: 2px; }
.header__brand { font-size: 0.6875rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.header__title { font-size: 1rem; font-weight: 700; color: var(--primary); }

.header__actions { display: flex; gap: 0.5rem; align-items: center; }

.btn--icon {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    border-radius: 6px; border: 1px solid var(--border);
    background: transparent; color: var(--text-muted);
    cursor: pointer; transition: all 0.2s;
}
.btn--icon:hover { background: var(--bg-body); color: var(--primary); border-color: var(--primary); }

.theme-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 40px; height: 40px;
    border-radius: 6px; background: transparent;
    border: 1px solid var(--border);
    cursor: pointer; transition: all 0.2s; color: var(--text-muted);
}
.theme-toggle:hover { background: var(--bg-body); color: var(--primary); transform: rotate(15deg); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun { display: none; }

[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

/* Content Modals (FAQ/Methodology) - Extends .modal-content */
.modal {
    background: var(--surface);
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 100%; max-width: 600px;
    max-height: 85vh;
    display: flex; flex-direction: column;
    position: relative;
    border: 1px solid var(--border);
    animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal__close {
    position: absolute; top: 1rem; right: 1rem;
    background: transparent; border: none;
    font-size: 1.5rem; color: var(--text-muted);
    cursor: pointer; padding: 0.5rem;
    line-height: 1; z-index: 10;
}
.modal__close:hover { color: var(--danger); }

.modal__title {
    padding: 1.5rem 1.5rem 1rem;
    font-size: 1.5rem; font-weight: 700;
    border-bottom: 1px solid var(--border);
    color: var(--text-main);
}

.faq-modal__content, .methodology-modal__content {
    padding: 1.5rem;
    overflow-y: auto;
}

.faq__item { margin-bottom: 1rem; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.faq__question {
    padding: 1rem; background: var(--bg-body);
    font-weight: 600; cursor: pointer; user-select: none;
    list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq__question::after { content: '+'; font-size: 1.2rem; color: var(--text-muted); }
details[open] .faq__question::after { content: '-'; }
.faq__answer { padding: 1rem; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

.methodology-section { margin-bottom: 1.5rem; }
.methodology-section h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--primary); }
.methodology-section p, .methodology-section li { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }
.methodology-section ul { padding-left: 1.5rem; }
.methodology-section li { margin-bottom: 0.5rem; }

/* Dark Mode Overrides for Header */
[data-theme="dark"] .header { background: rgba(30, 41, 59, 0.8); border-color: var(--border); }
[data-theme="dark"] .modal { background: #1e293b; border-color: #334155; }
[data-theme="dark"] .faq__question { background: #0f172a; }