/* ChooSolv - Shared Styles */
/* Dark theme design system */

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

:root {
    --bg-dark: #0a0a0f;
    --bg-card: #13131a;
    --bg-card-hover: #1a1a24;
    --accent: #ff6b35;
    --accent-hover: #ff8255;
    --accent-glow: rgba(255, 107, 53, 0.15);
    --accent-glow-strong: rgba(255, 107, 53, 0.25);
    --text-primary: #f0f0f5;
    --text-secondary: #8a8a9a;
    --text-muted: #5a5a6a;
    --border: #1e1e2a;
    --border-hover: #2e2e3a;
    --success: #10b981;
    --info: #3b82f6;
    --warning: #f59e0b;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 100px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --max-width: 1100px;
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    border-radius: var(--radius-full);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    text-decoration: none;
    line-height: 1.2;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 28px rgba(255, 107, 53, 0.4);
    transform: translateY(-1px);
}

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

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

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 0.6rem 1.4rem;
    font-size: 0.9rem;
}

/* ============================================================
   NAVIGATION
   ============================================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 2rem;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo-icon {
    width: 28px;
    height: 28px;
    background: var(--accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-links a {
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
    text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
    padding: 0.5rem 1.25rem;
    background: var(--accent);
    color: #fff !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.85rem;
    transition: background var(--transition-fast);
}

.nav-cta:hover {
    background: var(--accent-hover) !important;
}

.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}

.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.nav-mobile {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
    z-index: 999;
}

.nav-mobile.open {
    display: block;
}

.nav-mobile a {
    display: block;
    padding: 0.85rem 1rem;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-mobile a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* ============================================================
   SECTIONS
   ============================================================ */

.section {
    padding: 6rem 2rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-family: 'Space Grotesk', sans-serif;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    max-width: 600px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    max-width: 520px;
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    background: var(--bg-card);
}

.hero-badge span {
    color: var(--accent);
    font-weight: 500;
}

.hero h1 {
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    max-width: 800px;
    letter-spacing: -0.03em;
}

.hero h1 em {
    font-style: normal;
    color: var(--accent);
}

.hero-sub {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 520px;
    margin-top: 1.5rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* ============================================================
   STATS BAR
   ============================================================ */

.stats-bar {
    display: flex;
    justify-content: center;
    gap: 3rem;
    padding: 2.5rem 2rem;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

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

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.4rem;
}

/* ============================================================
   STEPS / HOW IT WORKS
   ============================================================ */

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.step-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    position: relative;
    transition: border-color var(--transition-base);
}

.step-card:hover {
    border-color: var(--accent);
}

.step-num {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 1rem;
}

.step-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================================
   CATEGORIES
   ============================================================ */

.cat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.cat-item {
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--bg-card);
    position: relative;
    overflow: hidden;
    transition: border-color var(--transition-base);
}

.cat-item:hover {
    border-color: var(--border-hover);
}

.cat-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.cat-item.home::after { background: #ff6b35; }
.cat-item.auto::after { background: #3b82f6; }
.cat-item.org::after { background: #10b981; }

.cat-icon {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.cat-item h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cat-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.cat-examples {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.cat-tag {
    padding: 0.3rem 0.7rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

/* ============================================================
   CTA SECTIONS
   ============================================================ */

.cta-section {
    padding: 5rem 2rem;
    text-align: center;
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.cta-section h2 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    max-width: 700px;
    margin: 0 auto 1rem;
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.6;
}

.cta-section .btn {
    margin-top: 2rem;
}

/* ============================================================
   CARDS (general purpose)
   ============================================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: border-color var(--transition-base);
}

.card:hover {
    border-color: var(--border-hover);
}

/* ============================================================
   FOOTER
   ============================================================ */

footer {
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.footer-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--text-secondary);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-hamburger {
        display: flex;
    }

    .hero {
        min-height: 85vh;
        padding: 5rem 1.5rem 3rem;
    }

    .steps-grid,
    .cat-grid {
        grid-template-columns: 1fr;
    }

    .stats-bar {
        flex-direction: column;
        gap: 1.5rem;
        padding: 2rem;
    }

    .section {
        padding: 4rem 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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