/* ═══════════════════════════════════════════════════════════════════
   DESIGN SYSTEM — Jonnathan Ospina Portfolio
   Single source of truth for all shared styles across pages.
   Page-specific rules live in each HTML file's <style> block.
   ═══════════════════════════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
    --bg:       #0a0a0f;
    --surface:  #111118;
    --elevated: #1a1a24;
    --accent:   #6ee7f7;
    --accent2:  #a78bfa;
    --text:     #f0f0f5;
    --muted:    #6b7280;
    --border:   rgba(110, 231, 247, 0.1);
}

/* ── RESET ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ── BASE ── */
body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ── BACKGROUND CANVAS (shared by subpages) ── */
#bg-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ── NAVIGATION ── */
.nav-container {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 200;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.1rem 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.08em;
    text-decoration: none;
    opacity: 0.8;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    background: transparent;
    border: none;
    border-bottom: 1px solid transparent;
    color: var(--muted);
    padding: 0.4rem 1rem;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all 0.2s ease;
}

.nav-btn:hover {
    color: var(--text);
    border-bottom-color: var(--accent);
}

.nav-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* ── LANG SWITCHER ── */
.lang-switcher {
    display: flex;
    gap: 0;
    margin-left: 1.5rem;
    border: 1px solid var(--border);
}

.lang-btn {
    background: transparent;
    border: none;
    border-right: 1px solid var(--border);
    color: var(--muted);
    padding: 0.35rem 0.65rem;
    font-size: 0.68rem;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: color 0.2s, background 0.2s;
    line-height: 1;
}

.lang-btn:last-child { border-right: none; }

.lang-btn:hover { color: var(--text); background: var(--surface); }

.lang-btn.active {
    color: var(--accent);
    background: rgba(110, 231, 247, 0.07);
}

/* ── BUTTONS ── */
.btn-primary {
    padding: 0.75rem 2rem;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    transition: all 0.25s ease;
    display: inline-block;
}

.btn-primary:hover {
    background: rgba(110, 231, 247, 0.08);
    box-shadow: 0 0 28px rgba(110, 231, 247, 0.15);
}

.btn-ghost {
    padding: 0.75rem 2rem;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    transition: all 0.25s ease;
    display: inline-block;
}

.btn-ghost:hover {
    border-color: var(--muted);
    color: var(--text);
}

/* ── PAGE HEADER (subpages) ── */
.page-header {
    margin-bottom: 3.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.page-header-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    opacity: 0.6;
    margin-bottom: 0.8rem;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.page-header .subtitle {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--muted);
    letter-spacing: 0.04em;
}

/* ── STATUS BAR ── */
.status-bar {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: rgba(17, 17, 24, 0.97);
    border-top: 1px solid var(--border);
    padding: 0.45rem 1.5rem;
    font-size: 0.7rem;
    font-family: 'JetBrains Mono', monospace;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--muted);
}

.status-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 6px;
    height: 6px;
    background: #34d399;
    border-radius: 50%;
    animation: pulse 2.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.5; transform: scale(1.3); }
}

/* ── FOOTER ── */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 2.5rem 2rem 4rem;
    color: var(--muted);
    position: relative;
    z-index: 10;
}

.footer a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s;
}

.footer a:hover { color: var(--accent); }

.footer-mono {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    margin-top: 0.8rem;
    opacity: 0.4;
    letter-spacing: 0.06em;
}

/* ── CARD ACCENT BAR (shared hover effect) ── */
.skill-card,
.experience-item,
.education-item,
.project-card,
.blog-post {
    position: relative;
    overflow: hidden;
}

.skill-card::before,
.experience-item::before,
.education-item::before,
.project-card::before,
.blog-post::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px;
    height: 0;
    transition: height 0.3s ease;
}

.skill-card::before   { background: var(--accent); }
.experience-item::before,
.education-item::before { background: var(--accent); }
.project-card::before { background: var(--accent2); }
.blog-post::before    { background: var(--accent2); }

.skill-card:hover::before,
.experience-item:hover::before,
.education-item:hover::before,
.project-card:hover::before,
.blog-post:hover::before { height: 100%; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
    .navbar { padding: 1rem 1.5rem; }
    .nav-logo { display: none; }
}