/* =============================================
   PAX SYSTEMIC — Global Design System
   Light / Professional / Microsoft-Store style
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;900&family=Space+Grotesk:wght@400;500;700&display=swap');

:root {
    /* ── Color Tokens ───────────────────── */
    --paper:       #FFFFFF;
    --mist:        #F4F6FB;
    --surface:     #FFFFFF;

    --ink:         #0F1729;
    --slate:       #5B6478;
    --fog:         #97A1B5;

    --line:        #E8EBF2;
    --line-strong: #D0D5E3;

    /* Brand — Software (blue) */
    --blue:        #2454FF;
    --blue-ink:    #1535CC;
    --blue-soft:   rgba(36, 84, 255, 0.08);
    --blue-line:   rgba(36, 84, 255, 0.28);

    /* Brand — Games (violet) */
    --violet:      #7A3FE0;
    --violet-ink:  #4D24A6;
    --violet-soft: rgba(122, 63, 224, 0.08);
    --violet-line: rgba(122, 63, 224, 0.28);

    /* ── Typography ─────────────────────── */
    --font-display: 'Space Grotesk', system-ui, sans-serif;
    --font-body:    'Inter', system-ui, sans-serif;
    --font-mono:    'SF Mono', 'Fira Code', 'Consolas', monospace;

    /* ── Elevation ──────────────────────── */
    --shadow-sm:   0 1px 4px rgba(15, 23, 41, 0.06), 0 2px 8px rgba(15, 23, 41, 0.04);
    --shadow-md:   0 4px 16px rgba(15, 23, 41, 0.10), 0 1px 4px rgba(15, 23, 41, 0.06);
    --shadow-lg:   0 16px 48px rgba(15, 23, 41, 0.14), 0 4px 16px rgba(15, 23, 41, 0.08);

    /* ── Shape ──────────────────────────── */
    --radius-sm:   6px;
    --radius-md:   12px;
    --radius-lg:   20px;
    --radius-xl:   32px;
}

/* ── Reset ────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background-color: var(--paper);
    color: var(--ink);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Layout ───────────────────────────── */
.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ── Header ───────────────────────────── */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 0 40px;
    height: 64px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

/* Logo */
.logo {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: opacity 0.2s;
    flex-shrink: 0;
}
.logo:hover { opacity: 0.7; }
.logo em { color: var(--blue); font-style: normal; }

/* Logo mark — small PS monogram */
.logo-mark {
    width: 28px;
    height: 28px;
    background: var(--ink);
    border-radius: 7px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 900;
    color: #fff;
    letter-spacing: 0;
    flex-shrink: 0;
}
.logo-mark::after { content: 'PS'; }

/* Nav */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--slate);
    padding: 6px 14px;
    border-radius: 30px;
    transition: all 0.18s;
}
.nav-link:hover { color: var(--ink); background: var(--mist); }
.nav-link.is-active-blue   { color: var(--blue);   background: var(--blue-soft); }
.nav-link.is-active-violet { color: var(--violet); background: var(--violet-soft); }

/* Header right area */
.header-right { display: flex; align-items: center; gap: 10px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-body);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.18s;
    border: none;
}
.btn-sm  { font-size: 0.82rem; padding: 8px 16px; }
.btn-md  { font-size: 0.9rem;  padding: 12px 24px; }
.btn-lg  { font-size: 1rem;    padding: 15px 36px; }

.btn-primary {
    background: var(--blue);
    color: #fff;
    box-shadow: 0 8px 24px var(--blue-soft);
}
.btn-primary:hover { background: var(--blue-ink); transform: translateY(-1px); }

.btn-secondary {
    background: var(--violet);
    color: #fff;
    box-shadow: 0 8px 24px var(--violet-soft);
}
.btn-secondary:hover { background: var(--violet-ink); transform: translateY(-1px); }

.btn-ghost {
    background: var(--paper);
    color: var(--slate);
    border: 1px solid var(--line-strong);
    box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink); }

/* Eyebrow label */
.eyebrow {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--fog);
    margin-bottom: 14px;
}
.eyebrow.is-blue   { color: var(--blue); }
.eyebrow.is-violet { color: var(--violet); }

/* ── Footer ───────────────────────────── */
.site-footer {
    background: var(--ink);
    color: rgba(255,255,255,0.65);
    padding: 64px 0 32px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 52px;
}

.footer-brand .logo { color: rgba(255,255,255,0.9); margin-bottom: 16px; }
.footer-brand .logo em { color: #6B9FFF; }
.footer-brand .logo-mark { background: rgba(255,255,255,0.12); }
.footer-brand p {
    font-size: 0.84rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.4);
    max-width: 260px;
}

.footer-col h5 {
    font-family: var(--font-display);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: rgba(255,255,255,0.35);
    margin-bottom: 16px;
}
.footer-col a {
    display: block;
    font-size: 0.88rem;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.18s;
}
.footer-col a:hover { color: #fff; }

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 28px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 0.8rem;
    color: rgba(255,255,255,0.28);
}

/* ── Animations ───────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ── Scrollbar ────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--mist); }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 3px; }

/* ── Mobile ───────────────────────────── */
@media (max-width: 900px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
    .site-header { padding: 0 20px; }
    .container { padding: 0 20px; }
    .main-nav { display: none; }
}
@media (max-width: 540px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}