/* =========================================================
   Pantone Snorkel Blue (19-4049) – portfolio de proyectos
   Soporta tema claro y oscuro con toggle manual + preferencia
   del sistema. Variables semánticas para mantener cohesión.
   ========================================================= */

:root {
    /* Snorkel Blue oficial y derivados */
    --snorkel-50:  #eaf2f8;
    --snorkel-100: #c9dcec;
    --snorkel-200: #9bbed7;
    --snorkel-300: #6a9fc1;
    --snorkel-400: #3a7fa9;
    --snorkel-500: #034F84; /* Pantone Snorkel Blue */
    --snorkel-600: #033f6a;
    --snorkel-700: #022f50;
    --snorkel-800: #021f36;
    --snorkel-900: #01111d;

    /* Tema claro (por defecto) */
    --bg: #f6f9fc;
    --bg-alt: #ffffff;
    --surface: #ffffff;
    --surface-2: #f0f5fa;
    --border: rgba(3, 79, 132, 0.12);
    --border-strong: rgba(3, 79, 132, 0.24);
    --text: #0a1f33;
    --text-muted: #4a6178;
    --text-soft: #6b7f93;
    --accent: var(--snorkel-500);
    --accent-hover: var(--snorkel-600);
    --accent-soft: rgba(3, 79, 132, 0.08);
    --shadow-sm: 0 1px 2px rgba(2, 31, 54, 0.06);
    --shadow-md: 0 8px 24px rgba(2, 31, 54, 0.08);
    --shadow-lg: 0 24px 60px rgba(2, 31, 54, 0.12);
    --gradient-hero: radial-gradient(circle at 20% 0%, rgba(3, 79, 132, 0.18), transparent 55%),
                     radial-gradient(circle at 80% 30%, rgba(58, 127, 169, 0.18), transparent 50%);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-xl: 32px;

    --transition-fast: 150ms ease;
    --transition-medium: 280ms cubic-bezier(0.2, 0.8, 0.2, 1);

    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

[data-theme="dark"] {
    --bg: #04111e;
    --bg-alt: #061a2c;
    --surface: #0a223a;
    --surface-2: #0d2a47;
    --border: rgba(155, 190, 215, 0.12);
    --border-strong: rgba(155, 190, 215, 0.28);
    --text: #e8f1fa;
    --text-muted: #9bbed7;
    --text-soft: #6a8aa8;
    --accent: #5fa8d6;
    --accent-hover: #87c1e3;
    --accent-soft: rgba(95, 168, 214, 0.14);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.6);
    --gradient-hero: radial-gradient(circle at 20% 0%, rgba(95, 168, 214, 0.22), transparent 55%),
                     radial-gradient(circle at 80% 30%, rgba(3, 79, 132, 0.45), transparent 50%);
}

/* Si el usuario aún no ha elegido tema y prefiere oscuro */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        --bg: #04111e;
        --bg-alt: #061a2c;
        --surface: #0a223a;
        --surface-2: #0d2a47;
        --border: rgba(155, 190, 215, 0.12);
        --border-strong: rgba(155, 190, 215, 0.28);
        --text: #e8f1fa;
        --text-muted: #9bbed7;
        --text-soft: #6a8aa8;
        --accent: #5fa8d6;
        --accent-hover: #87c1e3;
        --accent-soft: rgba(95, 168, 214, 0.14);
        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
        --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.5);
        --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.6);
        --gradient-hero: radial-gradient(circle at 20% 0%, rgba(95, 168, 214, 0.22), transparent 55%),
                         radial-gradient(circle at 80% 30%, rgba(3, 79, 132, 0.45), transparent 50%);
    }
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition-medium), color var(--transition-medium);
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover { color: var(--accent-hover); }

.container {
    width: min(1120px, calc(100% - 2.5rem));
    margin-inline: auto;
}

/* ----- Decoración del fondo ----- */
.bg-decoration {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(110px);
    opacity: 0.55;
    transition: opacity var(--transition-medium);
}
.blob-1 {
    width: 520px; height: 520px;
    background: var(--snorkel-500);
    top: -160px; left: -120px;
    opacity: 0.18;
}
.blob-2 {
    width: 420px; height: 420px;
    background: var(--snorkel-300);
    top: 30%; right: -160px;
    opacity: 0.18;
}
.blob-3 {
    width: 480px; height: 480px;
    background: var(--snorkel-700);
    bottom: -200px; left: 40%;
    opacity: 0.14;
}
[data-theme="dark"] .blob-1 { opacity: 0.30; }
[data-theme="dark"] .blob-2 { opacity: 0.28; }
[data-theme="dark"] .blob-3 { opacity: 0.40; }

/* ----- Header ----- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.9rem 0;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--text);
    font-weight: 700;
    letter-spacing: -0.01em;
}
.brand-mark {
    width: 32px; height: 32px;
    display: block;
    border-radius: 8px;
    object-fit: cover;
    box-shadow: 0 4px 12px var(--accent-soft);
}
.brand-text { font-size: 1.05rem; }

.site-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}
.site-nav a {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}
.site-nav a:hover { color: var(--text); }
.site-nav a::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -6px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-fast);
}
.site-nav a:hover::after { transform: scaleX(1); }

.theme-toggle {
    width: 40px; height: 40px;
    display: inline-grid;
    place-items: center;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover {
    background: var(--accent-soft);
    border-color: var(--border-strong);
    transform: translateY(-1px);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ----- Hero ----- */
.hero {
    padding: clamp(4rem, 10vw, 7rem) 0 clamp(3rem, 7vw, 5rem);
    background: var(--gradient-hero);
}
.hero-title {
    margin: 0 0 1.25rem;
    font-size: clamp(2.5rem, 5.6vw, 4.4rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.025em;
    max-width: 18ch;
}
.hero-highlight {
    background: linear-gradient(120deg, var(--snorkel-500), var(--snorkel-300));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    white-space: nowrap;
}
[data-theme="dark"] .hero-highlight {
    background: linear-gradient(120deg, #87c1e3, #c9dcec);
    -webkit-background-clip: text;
    background-clip: text;
}
.hero-lede {
    margin: 0 0 2rem;
    max-width: 60ch;
    color: var(--text-muted);
    font-size: 1.125rem;
}
.hero-cta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* ----- Botones ----- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.4rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.97rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 10px 24px var(--accent-soft);
}
.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 14px 32px var(--accent-soft);
}
.btn-ghost {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}
.btn-ghost:hover {
    border-color: var(--border-strong);
    color: var(--accent);
    transform: translateY(-2px);
}

/* ----- Sección de proyectos ----- */
.projects {
    padding: clamp(3rem, 8vw, 6rem) 0;
}
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}
.section-header h2 {
    margin: 0 0 0.5rem;
    font-size: clamp(1.85rem, 3.5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}
.section-header p {
    margin: 0;
    color: var(--text-muted);
    font-size: 1.05rem;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.project-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium), border-color var(--transition-medium);
    overflow: hidden;
}
.project-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-soft), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-medium);
    pointer-events: none;
}
.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-strong);
}
.project-card:hover::before { opacity: 1; }

.card-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: color-mix(in srgb, var(--card-accent, var(--accent)) 14%, transparent);
    color: var(--card-accent, var(--accent));
    border: 1px solid color-mix(in srgb, var(--card-accent, var(--accent)) 28%, transparent);
}
.card-icon svg { width: 22px; height: 22px; }

.card-body { flex: 1; }
.card-body h3 {
    margin: 0 0 0.4rem;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}
.card-body p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.97rem;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
}
.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    font-size: 0.93rem;
    color: var(--text-muted);
    padding: 0.4rem 0.6rem;
    border-radius: 8px;
    transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}
.card-link svg { width: 14px; height: 14px; }
.card-link:hover {
    color: var(--accent);
    background: var(--accent-soft);
}
.card-link.primary { color: var(--accent); }
.card-link.primary:hover { transform: translateX(2px); }

/* ----- About ----- */
.about {
    padding: clamp(3rem, 7vw, 5rem) 0;
    border-top: 1px solid var(--border);
    background: var(--bg-alt);
}
.about-inner {
    max-width: 720px;
    text-align: center;
}
.about-text h2 {
    margin: 0 0 1rem;
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    letter-spacing: -0.02em;
}
.about-text p {
    margin: 0 0 1rem;
    color: var(--text);
    font-size: 1.05rem;
}
.about-text .muted {
    color: var(--text-muted);
    font-size: 0.97rem;
}

/* ----- Footer ----- */
.site-footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    color: var(--text-soft);
    font-size: 0.9rem;
}
.footer-inner a {
    color: var(--text-soft);
    display: inline-grid;
    place-items: center;
    width: 36px; height: 36px;
    border-radius: 50%;
    transition: background var(--transition-fast), color var(--transition-fast);
}
.footer-inner a:hover {
    color: var(--accent);
    background: var(--accent-soft);
}
.footer-inner svg { width: 18px; height: 18px; }
.footer-inner .heart {
    width: 14px; height: 14px;
    color: var(--accent);
    vertical-align: -2px;
    margin: 0 1px;
    transition: transform var(--transition-fast);
}
.footer-inner .heart:hover { transform: scale(1.2); }

/* ----- Responsive ----- */
@media (max-width: 640px) {
    .site-nav { display: none; }
    .header-inner { padding: 0.75rem 0; }
    .hero { padding-top: 3rem; }
    .project-card { padding: 1.5rem; }
}

/* ----- Reduced motion ----- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}