/* ============================================================
   LOG IN COMPUTACIÓN — styles.css
   Estética retro CGA/DOS. Variables de color al principio
   para que sea fácil retocar la paleta.
   ============================================================ */

:root {
    --bg: #0a0a12;
    --bg-alt: #12121e;
    --fg: #e8e8e8;
    --accent: #55ff55;   /* verde CGA */
    --accent-2: #ff55ff; /* magenta CGA */
    --accent-3: #55ffff; /* cyan CGA */
    --border: #333349;
    --card-bg: #14141f;
    --font-display: 'Press Start 2P', monospace;
    --font-mono: 'Share Tech Mono', monospace;
}

[data-theme="light"] {
    --bg: #f0f0e8;
    --bg-alt: #ffffff;
    --fg: #101018;
    --accent: #007700;
    --accent-2: #aa00aa;
    --accent-3: #007777;
    --border: #ccccc0;
    --card-bg: #ffffff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: var(--font-mono);
    font-size: 18px;
    line-height: 1.6;
    transition: background .2s, color .2s;
}

h1, h2, h3, .logo, .btn, .card-icon { font-family: var(--font-display); }

h1 { font-size: 1.6rem; line-height: 1.5; margin: 0 0 1rem; }
h2 { font-size: 1.2rem; margin: 0 0 .75rem; }
h3 { font-size: .95rem; margin: 0 0 .5rem; color: var(--accent); }

a { color: var(--accent-3); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }

/* --- Header --- */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: var(--bg-alt);
    border-bottom: 2px solid var(--border);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.25rem;
}
.logo { font-size: .8rem; color: var(--accent); }
.logo-bracket { color: var(--accent-2); }
.cursor { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.site-nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.site-nav a { color: var(--fg); font-size: .95rem; }
.site-nav a:hover { color: var(--accent); text-decoration: none; }

.menu-toggle {
    display: none; background: none; border: 2px solid var(--border);
    color: var(--fg); font-size: 1.2rem; padding: .25rem .6rem; cursor: pointer;
}

#theme-toggle {
    position: fixed; top: 1rem; right: 1rem; z-index: 60;
    background: var(--card-bg); border: 2px solid var(--border);
    color: var(--fg); padding: .4rem .6rem; cursor: pointer; border-radius: 4px;
}

/* --- Hero --- */
.hero {
    padding: 4rem 0 3rem;
    border-bottom: 2px solid var(--border);
    background:
        linear-gradient(var(--bg-alt), var(--bg-alt)),
        repeating-linear-gradient(45deg, var(--border) 0 1px, transparent 1px 40px);
    background-blend-mode: normal;
}
.eyebrow { color: var(--accent-2); font-size: .85rem; letter-spacing: .05em; }
.hero-desc { max-width: 620px; opacity: .9; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* --- Botones --- */
.btn {
    display: inline-block; padding: .8rem 1.4rem; font-size: .75rem;
    border: 2px solid var(--accent); color: var(--accent);
    background: transparent; cursor: pointer; border-radius: 4px;
}
.btn:hover { background: var(--accent); color: var(--bg); text-decoration: none; }
.btn-primary { border-color: var(--accent); color: var(--accent); }
.btn-secondary { border-color: var(--accent-3); color: var(--accent-3); }
.btn-secondary:hover { background: var(--accent-3); color: var(--bg); }

/* --- Secciones --- */
.section { padding: 3.5rem 0; }
.section-alt { background: var(--bg-alt); }
.section-lead { opacity: .85; margin-bottom: 2rem; }
.page-header { border-bottom: 2px solid var(--border); padding-bottom: 2.5rem; }

/* --- Grids --- */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* --- Cards --- */
.card {
    display: flex; flex-direction: column; gap: .5rem;
    background: var(--card-bg); border: 2px solid var(--border);
    border-radius: 6px; padding: 1.5rem; color: var(--fg);
    transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-3px); text-decoration: none; }
.card-icon { font-size: 1.8rem; }
.card p { flex-grow: 1; opacity: .85; font-size: .95rem; }
.card-link { color: var(--accent); font-size: .85rem; }

.feature { padding: 1rem 0; }

/* --- Formulario --- */
.form { display: flex; flex-direction: column; gap: .35rem; }
.form label { font-size: .85rem; margin-top: .75rem; color: var(--accent-3); }
.form input, .form textarea {
    background: var(--card-bg); border: 2px solid var(--border);
    color: var(--fg); padding: .7rem; font-family: var(--font-mono);
    font-size: 1rem; border-radius: 4px;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form button { margin-top: 1.25rem; align-self: flex-start; }

.alert { padding: .8rem 1rem; border-radius: 4px; font-size: .9rem; }
.alert-ok { background: rgba(85,255,85,.12); border: 2px solid var(--accent); }
.alert-error { background: rgba(255,85,85,.12); border: 2px solid #ff5555; }

.mapa { margin-top: 1.5rem; border: 2px solid var(--border); border-radius: 6px; overflow: hidden; }

/* --- Footer --- */
.site-footer { background: var(--bg-alt); border-top: 2px solid var(--border); padding: 3rem 0 0; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.footer-col h4 { color: var(--accent); font-size: .85rem; margin-bottom: .75rem; }
.footer-col a { display: block; margin-bottom: .4rem; color: var(--fg); opacity: .85; }
.footer-bottom {
    margin-top: 2rem; padding: 1.25rem; text-align: center;
    font-size: .8rem; opacity: .7; border-top: 1px solid var(--border);
}
@media (max-width: 700px) {
    .footer-inner { grid-template-columns: 1fr; }
}

/* --- WhatsApp flotante --- */
.whatsapp-float {
    position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 60;
    width: 56px; height: 56px; border-radius: 50%;
    background: var(--accent); color: var(--bg);
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 10px rgba(0,0,0,.4);
}
.whatsapp-float:hover { filter: brightness(1.1); }

/* --- Responsive nav --- */
@media (max-width: 720px) {
    .menu-toggle { display: block; }
    .site-nav {
        display: none; flex-direction: column; width: 100%;
        position: absolute; top: 100%; left: 0;
        background: var(--bg-alt); border-bottom: 2px solid var(--border);
        padding: 1rem 1.25rem;
    }
    .site-nav.open { display: flex; }
}