/* ============================================================
   NEREO DESIGN SYSTEM — OceanIA
   Concepto: Océano profundo + Inteligencia Artificial
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ── Variables ─────────────────────────────────────────────── */
:root {
    /* Fondos */
    --nereo-bg-deep:        #060c1a;
    --nereo-bg-dark:        #0a1628;
    --nereo-bg-mid:         #0d1f3c;
    --nereo-bg-card:        rgba(13, 31, 60, 0.6);

    /* Accent IA */
    --nereo-cyan:           #00e5ff;
    --nereo-cyan-dim:       rgba(0, 229, 255, 0.12);
    --nereo-cyan-glow:      0 0 24px rgba(0, 229, 255, 0.45);
    --nereo-purple:         #7c3aed;
    --nereo-purple-dim:     rgba(124, 58, 237, 0.15);
    --nereo-purple-glow:    0 0 24px rgba(124, 58, 237, 0.5);

    /* Accent marino */
    --nereo-teal:           #00ffd5;
    --nereo-teal-dim:       rgba(0, 255, 213, 0.1);
    --nereo-blue-sci:       #0ea5e9;

    /* Texto */
    --nereo-text-primary:   #e2e8f0;
    --nereo-text-secondary: #94a3b8;
    --nereo-text-muted:     #475569;

    /* Glassmorphism */
    --nereo-glass-bg:       rgba(255, 255, 255, 0.05);
    --nereo-glass-border:   rgba(0, 229, 255, 0.15);
    --nereo-glass-blur:     blur(16px);

    /* Tipografía */
    --nereo-font-heading:   'Space Grotesk', system-ui, sans-serif;
    --nereo-font-body:      'Inter', system-ui, sans-serif;

    /* Espaciado */
    --nereo-section-py:     clamp(4rem, 9vw, 8rem);
    --nereo-section-px:     clamp(1.25rem, 5vw, 3.5rem);
    --nereo-container:      1280px;
    --nereo-container-wide: 1440px;

    /* Bordes */
    --nereo-radius-sm:      8px;
    --nereo-radius-md:      16px;
    --nereo-radius-lg:      24px;
    --nereo-radius-xl:      32px;
    --nereo-radius-full:    9999px;

    /* Transiciones */
    --nereo-transition:      all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --nereo-transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset básico ───────────────────────────────────────────── */
.nereo-site *,
.nereo-site *::before,
.nereo-site *::after {
    box-sizing: border-box;
}

/* ── Contenedor ─────────────────────────────────────────────── */
.nereo-container {
    max-width: var(--nereo-container);
    margin-inline: auto;
    padding-inline: var(--nereo-section-px);
    width: 100%;
}

.nereo-container--wide {
    max-width: var(--nereo-container-wide);
}

/* ── Glassmorphism ──────────────────────────────────────────── */
.nereo-glass {
    background: var(--nereo-glass-bg);
    backdrop-filter: var(--nereo-glass-blur);
    -webkit-backdrop-filter: var(--nereo-glass-blur);
    border: 1px solid var(--nereo-glass-border);
    border-radius: var(--nereo-radius-md);
}

/* ── Tipografía ─────────────────────────────────────────────── */
.nereo-page h1,
.nereo-page h2,
.nereo-page h3,
.nereo-page h4 {
    font-family: var(--nereo-font-heading);
    line-height: 1.15;
    font-weight: 600;
    color: var(--nereo-text-primary);
    margin: 0;
}

.nereo-page p,
.nereo-page li,
.nereo-page a {
    font-family: var(--nereo-font-body);
    line-height: 1.7;
}

.nereo-page p {
    color: var(--nereo-text-secondary);
    margin: 0;
}

/* ── Utilidades de color ────────────────────────────────────── */
.nereo-text-glow {
    color: var(--nereo-cyan);
    text-shadow: 0 0 20px rgba(0, 229, 255, 0.5);
}

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

.nereo-gradient-text--alt {
    background: linear-gradient(135deg, var(--nereo-teal) 0%, var(--nereo-cyan) 50%, var(--nereo-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Badge / etiqueta ───────────────────────────────────────── */
.nereo-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.3rem 0.875rem;
    font-family: var(--nereo-font-heading);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--nereo-cyan);
    background: var(--nereo-cyan-dim);
    border: 1px solid rgba(0, 229, 255, 0.25);
    border-radius: var(--nereo-radius-full);
}

/* ── Botones ────────────────────────────────────────────────── */
.nereo-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.875rem;
    background: linear-gradient(135deg, var(--nereo-cyan) 0%, var(--nereo-blue-sci) 100%);
    color: var(--nereo-bg-deep);
    font-family: var(--nereo-font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    border: none;
    border-radius: var(--nereo-radius-full);
    cursor: pointer;
    text-decoration: none;
    transition: var(--nereo-transition);
    white-space: nowrap;
}

.nereo-btn-primary:hover {
    box-shadow: var(--nereo-cyan-glow);
    transform: translateY(-2px);
    color: var(--nereo-bg-deep);
    text-decoration: none;
}

.nereo-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.875rem;
    background: transparent;
    color: var(--nereo-text-primary);
    font-family: var(--nereo-font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    border: 1px solid var(--nereo-glass-border);
    border-radius: var(--nereo-radius-full);
    cursor: pointer;
    text-decoration: none;
    transition: var(--nereo-transition);
    white-space: nowrap;
}

.nereo-btn-secondary:hover {
    border-color: var(--nereo-cyan);
    color: var(--nereo-cyan);
    background: var(--nereo-cyan-dim);
    text-decoration: none;
}

.nereo-btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.85rem;
}

/* ── Reveal on scroll ───────────────────────────────────────── */
.nereo-reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.nereo-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ── Secciones ──────────────────────────────────────────────── */
.nereo-section {
    padding-block: var(--nereo-section-py);
    position: relative;
    overflow: hidden;
}

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

.nereo-section__header {
    text-align: center;
    margin-bottom: clamp(2.5rem, 5vw, 4rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.nereo-section__title {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 700;
    max-width: 800px;
}

.nereo-section__subtitle {
    color: var(--nereo-text-secondary);
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    max-width: 620px;
    text-align: center;
}

/* ── Grid 2 columnas ────────────────────────────────────────── */
.nereo-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(2rem, 4vw, 4rem);
    align-items: center;
}

@media (max-width: 768px) {
    .nereo-grid-2 {
        grid-template-columns: 1fr;
    }
}

/* ── Scan overlay (efecto línea de escaneo) ─────────────────── */
.nereo-scan-overlay {
    position: relative;
    overflow: hidden;
    border-radius: var(--nereo-radius-md);
}

.nereo-scan-overlay::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--nereo-cyan) 50%, transparent 100%);
    animation: nereo-scan 3.5s linear infinite;
    pointer-events: none;
}

/* ── Divider decorativo ─────────────────────────────────────── */
.nereo-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--nereo-glass-border), transparent);
    margin-block: 0;
}