/* ==========================================================================
   APEX // BRAKE LAB — Página principal (index.html)
   ========================================================================== */

:root {
    --bg-dark: #0a0a0d;
    --card-bg: #121217;
    --red-eva: #e60012;
    --orange-accent: #ff8c00;
    --yellow-eva: #ffc700;
    --purple-eva: #8b5cf6;
    --green-eva: #10b981;
    --text-main: #f3f4f6;
    --text-muted: #a1a1aa;
    --font-head: 'Rajdhani', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

section[id] {
    scroll-margin-top: 5rem; /* la barra superior es fija */
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
}

:focus-visible {
    outline: 2px solid var(--yellow-eva);
    outline-offset: 3px;
}

/* ---------- Navbar ---------- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
    background-color: rgba(18, 18, 23, 0.95);
    border-bottom: 1px solid rgba(230, 0, 18, 0.5);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.logo {
    font-family: var(--font-head);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 0 0 8px rgba(230, 0, 18, 0.6);
}

.logo .accent {
    color: var(--red-eva);
}

.nav-links a {
    position: relative;
    margin-left: 1.8rem;
    color: var(--text-main);
    text-decoration: none;
    font-family: var(--font-head);
    font-weight: 600;
    font-size: 1.05rem;
    text-transform: uppercase;
    transition: all 0.25s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background-color: var(--green-eva);
    transition: width 0.25s ease;
}

.nav-links a:hover {
    color: var(--yellow-eva);
    text-shadow: 0 0 10px rgba(255, 199, 0, 0.8);
}

.nav-links a:hover::after {
    width: 100%;
}

/* ---------- Hero ---------- */
.hero {
    padding: 6.5rem 1rem;
    text-align: center;
    background-color: var(--bg-dark);
    background-image:
        linear-gradient(rgba(230, 0, 18, 0.18) 1.5px, transparent 1.5px),
        linear-gradient(90deg, rgba(230, 0, 18, 0.18) 1.5px, transparent 1.5px);
    background-size: 32px 32px;
    border-bottom: 1px solid rgba(230, 0, 18, 0.3);
}

.hero h1 {
    font-family: var(--font-head);
    font-size: 3.4rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 20px rgba(230, 0, 18, 0.6);
}

.hero p {
    color: var(--text-muted);
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
}

/* ---------- Botones (corte biselado) ---------- */
.btn {
    display: inline-block;
    padding: 0.85rem 2.2rem;
    border: none;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.15rem;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--red-eva), #99000c);
    color: #fff;
    box-shadow: 0 0 18px rgba(230, 0, 18, 0.5);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--orange-accent), var(--yellow-eva));
    color: #000;
    transform: scale(1.04);
    filter: drop-shadow(0 0 14px rgba(255, 199, 0, 0.9));
}

.btn-card {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* ---------- Secciones ---------- */
.container {
    max-width: 1000px;
    margin: 4rem auto;
    padding: 0 1rem;
}

.section-title {
    font-family: var(--font-head);
    text-align: center;
    font-size: 2.1rem;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
}

.title-accent {
    color: var(--red-eva);
}

.info-section {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 4rem;
}

.section-intro {
    max-width: 750px;
    margin: 0 auto 3rem auto;
    text-align: center;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.8rem;
}

.info-card {
    background-color: var(--card-bg);
    padding: 1.8rem;
    border-left: 3px solid var(--red-eva);
    border-radius: 2px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    border-left-color: var(--yellow-eva);
}

.info-icon {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}

.info-card h3 {
    font-family: var(--font-head);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.info-card p {
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* ---------- Tarjetas de módulos ---------- */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.card {
    background-color: var(--card-bg);
    padding: 2.2rem;
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
    transition: all 0.3s ease;
}

.card h3 {
    font-family: var(--font-head);
    font-size: 1.4rem;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.98rem;
    margin-bottom: 1.8rem;
}

.card:hover {
    transform: translateY(-6px);
}

.card-red {
    border: 1px solid var(--red-eva);
}

.card-red:hover {
    border-color: var(--orange-accent);
    filter: drop-shadow(0 0 12px rgba(230, 0, 18, 0.5));
}

.card-red .btn-card:hover {
    background-color: var(--red-eva);
    color: #fff;
    border-color: var(--yellow-eva);
    box-shadow: 0 0 12px rgba(230, 0, 18, 0.6);
}

.card-purple {
    border: 1px solid var(--purple-eva);
}

.card-purple:hover {
    border-color: var(--green-eva);
    filter: drop-shadow(0 0 12px rgba(139, 92, 246, 0.6));
}

.card-purple .btn-card:hover {
    background-color: var(--purple-eva);
    color: #fff;
    border-color: var(--green-eva);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.7);
}

/* ---------- Footer y aviso ---------- */
.footer {
    padding: 2.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 2rem;
    transform: translate(-50%, 20px);
    padding: 0.8rem 1.6rem;
    background-color: var(--card-bg);
    border: 1px solid var(--purple-eva);
    color: var(--text-main);
    font-family: var(--font-head);
    letter-spacing: 1px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
    z-index: 200;
}

.toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* ---------- Móvil ---------- */
@media (max-width: 640px) {
    .navbar { padding: 1rem; }
    .logo { font-size: 1.25rem; }
    .nav-links a { margin-left: 0.9rem; font-size: 0.95rem; }
    .hero { padding: 4rem 1rem; }
    .hero h1 { font-size: 2.2rem; }
    .section-title { font-size: 1.6rem; }
    .modules-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
}