/* ---------------------------------------------------------
   SPECTRA NEXUS UI SYSTEM — SN‑UI 2050/2077 (A+B MIX)
--------------------------------------------------------- */

/* COLOR SYSTEM */
:root {
    --sn-bg-dark: #020617;
    --sn-bg-panel: rgba(255,255,255,0.05);

    --sn-neon-purple: #a78bfa;
    --sn-neon-cyan: #22d3ee;
    --sn-neon-blue: #3b82f6;
    --sn-neon-pink: #ec4899;

    --sn-text-light: #e2e8f0;
    --sn-text-dim: #94a3b8;

    --sn-glow-strong: 0 0 35px rgba(167,139,250,0.8);
    --sn-glow-soft: 0 0 20px rgba(167,139,250,0.4);
}

/* TYPOGRAPHY */
.sn-title-xl {
    font-size: 52px;
    font-weight: 700;
    color: var(--sn-neon-purple);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.sn-title-lg {
    font-size: 36px;
    font-weight: 600;
    color: var(--sn-neon-blue);
}

.sn-title-md {
    font-size: 24px;
    font-weight: 600;
    color: var(--sn-neon-cyan);
}

.sn-text {
    font-size: 16px;
    color: var(--sn-text-light);
    opacity: 0.85;
}

.sn-label {
    font-size: 12px;
    color: var(--sn-neon-pink);
    letter-spacing: 1px;
}

/* BUTTONS */
.sn-btn {
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: 0.25s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Neon Purple */
.sn-btn-purple {
    background: var(--sn-neon-purple);
    color: #0f0f1a;
    box-shadow: var(--sn-glow-strong);
}
.sn-btn-purple:hover {
    transform: scale(1.05);
    box-shadow: 0 0 45px var(--sn-neon-purple);
}

/* Cyberpunk Pink */
.sn-btn-pink {
    background: var(--sn-neon-pink);
    color: #0f0f1a;
    box-shadow: 0 0 35px var(--sn-neon-pink);
}
.sn-btn-pink:hover {
    transform: scale(1.05);
    box-shadow: 0 0 45px var(--sn-neon-pink);
}

/* Glass Button */
.sn-btn-glass {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    color: var(--sn-text-light);
}
.sn-btn-glass:hover {
    background: rgba(255,255,255,0.15);
    transform: scale(1.05);
}

/* CARDS */
.sn-card {
    background: var(--sn-bg-panel);
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(12px);
    padding: 25px;
    border-radius: 16px;
    box-shadow: var(--sn-glow-soft);
    transition: 0.3s ease;
}

.sn-card:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: var(--sn-glow-strong);
}

/* GRIDS */
.sn-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.sn-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.sn-grid-center {
    display: grid;
    place-items: center;
}

/* SECTIONS */
.sn-section {
    padding: 80px 40px;
}

.sn-section-dark {
    background: var(--sn-bg-dark);
}

.sn-section-glass {
    background: rgba(255,255,255,0.03);
    backdrop-filter: blur(8px);
}

/* UTILITIES */
.sn-flex {
    display: flex;
    align-items: center;
}

.sn-flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.sn-text-center {
    text-align: center;
}

.sn-mt-20 { margin-top: 20px; }
.sn-mt-40 { margin-top: 40px; }
.sn-mb-20 { margin-bottom: 20px; }
.sn-mb-40 { margin-bottom: 40px; }

/* MOTION */
.sn-pulse {
    animation: snPulse 2.5s infinite ease-in-out;
}

@keyframes snPulse {
    0% { opacity: 0.7; }
    50% { opacity: 1; }
    100% { opacity: 0.7; }
}

.sn-flicker {
    animation: snFlicker 4s infinite;
}

@keyframes snFlicker {
    0%, 100% { opacity: 1; }
    45% { opacity: 0.85; }
    50% { opacity: 0.6; }
    55% { opacity: 0.85; }
}