/* ==========================================================================
   MyShopMetrics — Industrial Design System
   Dark-first, steel cyan accent, blueprint-inspired
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Fonts */
    --msm-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --msm-font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;

    /* Layout */
    --msm-container: 1200px;
    --msm-radius: 8px;
    --msm-radius-sm: 6px;
    --msm-radius-lg: 12px;
    --msm-side-pad: clamp(20px, 5vw, 60px);
    --msm-transition: 0.15s ease;

    /* Accent (shared across themes) */
    --msm-accent: #3b82f6;
    --msm-accent-hover: #2563eb;
    --msm-accent-subtle: rgba(6, 182, 212, 0.10);
    --msm-accent-glow: 0 0 20px rgba(6, 182, 212, 0.15);
    --msm-success: #22c55e;
    --msm-success-subtle: rgba(34, 197, 94, 0.10);
    --msm-warning: #f59e0b;
    --msm-danger: #ef4444;
}

/* Light mode only */
:root {
    --msm-bg: #ffffff;
    --msm-bg-raised: #f8f9fa;
    --msm-bg-card: #ffffff;
    --msm-bg-card-hover: #f8f9fa;
    --msm-bg-input: #f8fafc;
    --msm-bg-header: rgba(255, 255, 255, 0.95);
    --msm-border: #e2e8f0;
    --msm-border-accent: #d1d5db;
    --msm-text: #2c3e50;
    --msm-text-secondary: #4b5563;
    --msm-text-muted: #9ca3af;
    --msm-shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.08);
    --msm-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --msm-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
}

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

/* ---------- Base ---------- */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--msm-font);
    background: var(--msm-bg);
    color: var(--msm-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

/* ---------- Container ---------- */
.msm-container {
    max-width: var(--msm-container);
    margin: 0 auto;
    padding: 0 var(--msm-side-pad);
}

/* ---------- Navigation ---------- */
.msm-nav {
    background: white;
    padding: 18px 0;
    box-shadow: var(--msm-shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.msm-nav .container {
    max-width: var(--msm-container);
    margin: 0 auto;
    padding: 0 var(--msm-side-pad);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.msm-nav .logo {
    font-size: 26px;
    font-weight: 700;
    color: var(--msm-text);
}

.msm-nav .logo-accent {
    color: var(--msm-accent);
}

.msm-nav ul {
    list-style: none;
    display: flex;
    gap: 28px;
    align-items: center;
}

.msm-nav a {
    color: var(--msm-text);
    font-weight: 500;
    transition: color 0.2s;
}

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

@media (max-width: 768px) {
    .msm-nav .container {
        flex-wrap: wrap;
        gap: 8px;
    }

    .msm-nav ul {
        gap: 12px;
        font-size: 14px;
        flex-wrap: wrap;
    }

    .msm-nav .logo {
        font-size: 20px;
    }
}

/* ---------- Footer ---------- */
.msm-footer {
    border-top: 1px solid var(--msm-border);
    padding: 48px var(--msm-side-pad) 32px;
    margin-top: 60px;
}

.msm-footer__inner {
    max-width: var(--msm-container);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 40px;
}

.msm-footer__brand-name {
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: var(--msm-text);
}

.msm-footer__brand-name .accent {
    color: var(--msm-accent);
}

.msm-footer__tagline {
    font-size: 0.85rem;
    color: var(--msm-text-muted);
    font-style: italic;
    margin-bottom: 12px;
}

.msm-footer__col-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--msm-text-muted);
    margin-bottom: 14px;
}

.msm-footer__col ul {
    list-style: none;
}

.msm-footer__col li {
    margin-bottom: 8px;
}

.msm-footer__col a {
    font-size: 0.85rem;
    color: var(--msm-text-secondary);
    transition: color var(--msm-transition);
}

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

.msm-footer__bottom {
    max-width: var(--msm-container);
    margin: 32px auto 0;
    padding-top: 20px;
    border-top: 1px solid var(--msm-border);
    text-align: center;
    font-size: 0.78rem;
    color: var(--msm-text-muted);
}

@media (max-width: 768px) {
    .msm-footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .msm-footer__inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* ---------- Buttons ---------- */
.msm-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--msm-font);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    border-radius: var(--msm-radius-sm);
    cursor: pointer;
    transition: background var(--msm-transition), box-shadow var(--msm-transition);
}

.msm-btn--primary {
    background: var(--msm-accent);
    color: #fff;
}

.msm-btn--primary:hover {
    background: var(--msm-accent-hover);
    box-shadow: var(--msm-accent-glow);
}

.msm-btn--outline {
    background: transparent;
    color: var(--msm-accent);
    border: 1px solid var(--msm-accent);
}

.msm-btn--outline:hover {
    background: var(--msm-accent-subtle);
}

/* ---------- Section ---------- */
.msm-section {
    padding: 48px 0;
}

.msm-section__title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--msm-accent);
    margin-bottom: 8px;
}

.msm-section__heading {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
    color: var(--msm-text);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.msm-section__desc {
    font-size: 1rem;
    color: var(--msm-text-secondary);
    max-width: 600px;
}

/* ---------- Cards ---------- */
.msm-card {
    background: var(--msm-bg-card);
    border: 1px solid var(--msm-border);
    border-radius: var(--msm-radius);
    padding: 20px;
    transition: border-color var(--msm-transition), box-shadow var(--msm-transition);
}

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

.msm-card--interactive:hover {
    border-color: var(--msm-accent);
    box-shadow: 0 0 0 1px var(--msm-accent), var(--msm-accent-glow);
}

/* ---------- Utility ---------- */
.msm-mono { font-family: var(--msm-font-mono); font-variant-numeric: tabular-nums; }
.msm-label { font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--msm-text-muted); }
.msm-divider { border: none; border-top: 1px solid var(--msm-border); margin: 24px 0; }