/* ==========================================================================
   NEURAL DESIGN SYSTEM — Shared Foundation
   Extracted from NeuroGen special.html for reuse across public pages.
   ========================================================================== */

/* ── Tokens ──────────────────────────────────────────────────────────────── */

:root {
    --neural-void: #0f1419;
    --neural-deep: #15202b;
    --neural-surface: #192734;
    --neural-elevated: #22303c;
    --neural-border: rgba(136, 153, 166, 0.15);
    --neural-border-strong: rgba(136, 153, 166, 0.28);

    --accent-primary: #8ab4f8;
    --accent-primary-bright: #aecbfa;
    --accent-primary-glow: rgba(138, 180, 248, 0.12);
    --accent-secondary: #669df6;

    --data-positive: #81c995;
    --data-negative: #f28b82;
    --data-warning: #fdd663;
    --data-highlight: #fbbf24;

    --synapse-cyan: #8ab4f8;
    --synapse-teal: #78d9ec;
    --synapse-emerald: #81c995;
    --synapse-amber: #fdd663;
    --synapse-rose: #f28b82;
    --synapse-violet: #c58af9;

    --text-primary: #e7e9ea;
    --text-secondary: #8899a6;
    --text-tertiary: #6e7681;

    --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-data: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'SF Mono', 'Menlo', 'Monaco', monospace;

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Base ────────────────────────────────────────────────────────────────── */

body.neurogen-dark {
    background: var(--neural-void) !important;
    font-family: var(--font-display);
}

.neurogen-header {
    background: rgba(15, 20, 25, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--neural-border);
}

.neurogen-main {
    padding: 0 !important;
}

.neurogen-main > .container-fluid {
    padding: 0 !important;
    max-width: 100% !important;
}

/* ── Buttons ─────────────────────────────────────────────────────────────── */

.btn-neural-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--synapse-cyan) 0%, var(--synapse-teal) 100%);
    color: var(--neural-void);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    border-radius: 12px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
    box-shadow: 0 4px 20px rgba(138, 180, 248, 0.3);
}

.btn-neural-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(138, 180, 248, 0.4);
    color: var(--neural-void);
    text-decoration: none;
}

.btn-neural-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--neural-border-strong);
    border-radius: 12px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
}

.btn-neural-outline:hover {
    border-color: var(--accent-primary);
    background: var(--accent-primary-glow);
    color: var(--text-primary);
    text-decoration: none;
    transform: translateY(-2px);
}

/* ── Section Headers ─────────────────────────────────────────────────────── */

.section-header-neural {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
    background: rgba(138, 180, 248, 0.1);
    color: var(--synapse-cyan);
    border: 1px solid rgba(138, 180, 248, 0.2);
}

.section-tag-rose { background: rgba(242, 139, 130, 0.1); color: var(--synapse-rose); border-color: rgba(242, 139, 130, 0.2); }
.section-tag-emerald { background: rgba(129, 201, 149, 0.1); color: var(--synapse-emerald); border-color: rgba(129, 201, 149, 0.2); }
.section-tag-amber { background: rgba(253, 214, 99, 0.1); color: var(--synapse-amber); border-color: rgba(253, 214, 99, 0.2); }
.section-tag-violet { background: rgba(197, 138, 249, 0.1); color: var(--synapse-violet); border-color: rgba(197, 138, 249, 0.2); }

.section-title-neural {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 12px;
}

.section-subtitle-neural {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.6;
}

.gradient-text {
    background: linear-gradient(135deg, var(--synapse-cyan) 0%, var(--synapse-teal) 40%, var(--synapse-violet) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Cards ───────────────────────────────────────────────────────────────── */

.neural-card {
    background: var(--neural-surface);
    border: 1px solid var(--neural-border);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s var(--ease-out-expo);
}

.neural-card:hover {
    border-color: var(--neural-border-strong);
    transform: translateY(-2px);
}

/* ── Animations ──────────────────────────────────────────────────────────── */

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes neuralPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .neural-card {
        padding: 20px;
        border-radius: 12px;
    }

    .btn-neural-primary,
    .btn-neural-outline {
        padding: 12px 20px;
        font-size: 0.88rem;
        width: 100%;
        justify-content: center;
    }

    .section-header-neural {
        margin-bottom: 32px;
    }

    .section-subtitle-neural {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .neural-card {
        padding: 16px;
        border-radius: 10px;
    }

    .section-title-neural {
        font-size: 1.5rem;
    }

    .section-tag {
        font-size: 0.72rem;
        padding: 4px 12px;
    }
}