/* ============================================================
   NodeMini — Design System Core CSS
   "Dark Matter" — v2.0
   ============================================================ */

/* ── Base ── */
html {
    scrollbar-width: thin;
    scrollbar-color: #333 #030303;
    scroll-behavior: smooth;
    overflow-x: hidden;
}
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #030303; }
::-webkit-scrollbar-thumb { background: #2a2a2a; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #444; }

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-font-smoothing: antialiased;
    background-color: #030303;
    color: #ffffff;
    overflow-x: hidden;
    max-width: 100%;
}

/* ── CSS Variables (Design Tokens) ── */
:root {
    --background:                #030303;
    --surface:                   #0d0d0d;
    --surface-container-lowest:  #0a0a0a;
    --surface-container-low:     #111111;
    --surface-container:         #1a1a1a;
    --surface-container-high:    #222222;
    --surface-container-highest: #2a2a2a;
    --surface-dim:               #333333;

    --primary:           #4d9fff;
    --primary-container: #0071e3;
    --on-primary:        #ffffff;

    --on-surface:         #ffffff;
    --on-surface-variant: #a0a0a0;
    --outline:            #444444;
    --outline-variant:    #2a2a2a;

    --tertiary:           #00e38b;
    --tertiary-fixed-dim: #00b56e;
    --error:              #ff4d4d;
}

/* ============================================================
   TYPOGRAPHY UTILITIES
   ============================================================ */
.label-cap {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--on-surface-variant);
}
.headline-section {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
}
.display-xl {
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.95;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
    background: linear-gradient(135deg, #0059b5 0%, #0071e3 100%);
    color: #ffffff;
    cursor: pointer;
    transition: box-shadow 0.2s ease, transform 0.15s ease;
}
.btn-primary:hover  { box-shadow: 0 8px 32px rgba(0,113,227,.4); transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
    background: var(--surface-container);
    color: #ffffff;
    border: 1px solid var(--outline-variant);
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease;
}
.btn-secondary:hover { background: var(--surface-container-high); border-color: var(--outline); }

/* ============================================================
   ELEVATION — dark ambient shadows
   ============================================================ */
.card-lift  { box-shadow: 0 0 40px 0 rgba(0,0,0,.4); }
.card-hover { transition: box-shadow 0.3s ease, transform 0.3s ease; }
.card-hover:hover {
    box-shadow: 0 12px 48px 0 rgba(0,0,0,.6);
    transform: translateY(-3px);
}

.ghost-border { border: 1px solid rgba(255,255,255,.08); }

/* ============================================================
   GLASS HEADER
   ============================================================ */
.glass-header {
    background: rgba(3,3,3,.85);
    backdrop-filter: saturate(180%) blur(40px);
    -webkit-backdrop-filter: saturate(180%) blur(40px);
    border-bottom: 1px solid rgba(255,255,255,.06);
}

/* ============================================================
   LANGUAGE SELECTOR
   ============================================================ */
.lang-selector { position: relative; }

.lang-trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.45);
    padding: 6px 12px;
    border-radius: 999px;
    background: transparent;
    transition: all 0.25s ease;
    white-space: nowrap;
    border: none;
}
.lang-trigger:hover {
    color: #ffffff;
    background: var(--surface-container);
}
.lang-trigger svg { transition: transform 0.3s ease; }
.lang-selector.open .lang-trigger .lang-chevron { transform: rotate(180deg); }

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: rgba(13,13,13,.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 20px;
    padding: 8px;
    min-width: 168px;
    box-shadow: 0 20px 60px rgba(0,0,0,.6), 0 4px 16px rgba(0,0,0,.4);
    opacity: 0;
    transform: translateY(-8px) scale(0.97);
    pointer-events: none;
    transition: all 0.22s cubic-bezier(0.19,1,0.22,1);
    z-index: 200;
}
.lang-selector.open .lang-dropdown {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 12px;
    cursor: pointer;
    transition: background 0.15s ease;
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255,255,255,.45);
    letter-spacing: 0.02em;
}
.lang-option:hover { background: var(--surface-container); color: #ffffff; }
.lang-option.active { background: #ffffff; color: #030303; }
.lang-option .lang-code {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    opacity: 0.45;
    min-width: 28px;
    text-transform: uppercase;
}
.lang-option.active .lang-code { opacity: 0.5; }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.9s cubic-bezier(.2,0,0,1), transform 0.9s cubic-bezier(.2,0,0,1);
}
.reveal.active { opacity: 1; transform: translateY(0); }
.d1 { transition-delay: 0.10s; }
.d2 { transition-delay: 0.20s; }
.d3 { transition-delay: 0.30s; }
.d4 { transition-delay: 0.40s; }

/* ============================================================
   STATUS DOT — Emerald pulse
   ============================================================ */
@keyframes pulse-ring {
    0%,100% { box-shadow: 0 0 0 0 rgba(0,227,139,.5); }
    50%      { box-shadow: 0 0 0 6px rgba(0,227,139,.0); }
}
.status-dot { animation: pulse-ring 2.4s ease-in-out infinite; }

/* ============================================================
   TAG CHIPS
   ============================================================ */
.chip {
    display: inline-block;
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    border-radius: 999px;
    padding: 3px 10px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: rgba(255,255,255,.45);
}

/* ============================================================
   INPUT FIELDS
   ============================================================ */
.input-field {
    width: 100%;
    background: var(--surface-container-low);
    border: 1.5px solid var(--outline-variant);
    border-radius: 14px;
    padding: 14px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #ffffff;
    transition: all 0.2s ease;
    outline: none;
    font-family: inherit;
}
.input-field::placeholder { color: rgba(255,255,255,.2); }
.input-field:focus {
    background: var(--surface-container);
    border-color: rgba(77,159,255,.4);
    box-shadow: 0 0 0 3px rgba(77,159,255,.08);
}
.input-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: rgba(255,255,255,.35);
    margin-bottom: 8px;
}

/* ============================================================
   MARQUEE
   ============================================================ */
@keyframes marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}
.marquee-track { animation: marquee 36s linear infinite; }
.marquee-wrap:hover .marquee-track { animation-play-state: paused; }

/* ============================================================
   FLOATING ANIMATION
   ============================================================ */
@keyframes float {
    0%,100% { transform: translateY(0); }
    50%      { transform: translateY(-16px); }
}
.floating { animation: float 7s ease-in-out infinite; }

/* ============================================================
   FOOTER RESPONSIVE GRID
   ============================================================ */
.footer-cols {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

@media (max-width: 1023px) {
    .footer-cols {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 639px) {
    .footer-cols {
        grid-template-columns: 1fr 1fr;
        gap: 2rem 1.5rem;
    }
    .footer-cols > :first-child {
        grid-column: span 2;
    }
}