/* ==========================================================================
   Kaspian Fuad — kaspianfuad.com
   Dark theme, purple accents — matching LinkedIn branding
   ========================================================================== */

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

:root {
  --color-bg: #0a0a0f;
  --color-bg-elevated: #111118;
  --color-bg-card: #181823;
  --color-text: #e4e4ec;
  --color-text-muted: #9494a8;
  --color-text-bright: #ffffff;
  --color-primary: #8b5cf6;
  --color-primary-hover: #7c3aed;
  --color-primary-glow: rgba(139, 92, 246, 0.15);
  --color-primary-subtle: rgba(139, 92, 246, 0.08);
  --color-accent: #a78bfa;
  --color-success: #34d399;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(139, 92, 246, 0.3);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container: 1120px;
  --container-narrow: 720px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.15);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }
::selection { background: var(--color-primary); color: white; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.site-logo { font-size: 1.15rem; font-weight: 700; color: var(--color-text-bright); letter-spacing: -0.02em; }
.site-logo:hover { color: var(--color-accent); }
.nav-links { list-style: none; display: flex; gap: 2rem; }
.nav-links a { color: var(--color-text-muted); font-size: 0.9rem; font-weight: 500; transition: color var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--color-accent); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--color-text-bright); }

/* Hero */
.hero {
  padding: 6rem 0 5rem; text-align: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}
.hero > .container { position: relative; z-index: 1; }
.hero h1 { font-size: 3.25rem; font-weight: 800; letter-spacing: -0.04em; color: var(--color-text-bright); line-height: 1.1; margin-bottom: 0.25rem; }
.hero-title { font-size: 1.25rem; color: var(--color-accent); font-weight: 600; margin-bottom: 1.25rem; }
.hero-tagline { font-size: 1.1rem; color: var(--color-text-muted); max-width: 580px; margin: 0 auto 2.5rem; line-height: 1.65; }

.hero-stats { display: flex; justify-content: center; gap: 1.5rem; margin-bottom: 2.5rem; }
.stat {
  text-align: center; padding: 1.25rem 1.5rem; min-width: 150px;
  background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.stat:hover { border-color: var(--color-border-hover); box-shadow: var(--shadow-glow); }
.stat-number { display: block; font-size: 1.75rem; font-weight: 800; color: var(--color-text-bright); letter-spacing: -0.03em; }
.stat-label { font-size: 0.72rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600; margin-top: 0.25rem; }

.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Buttons */
.btn { display: inline-block; padding: 0.8rem 1.75rem; border-radius: var(--radius-sm); font-size: 0.95rem; font-weight: 600; transition: all var(--transition); cursor: pointer; border: 2px solid transparent; }
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3); }
.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); color: #fff; box-shadow: 0 6px 25px rgba(139, 92, 246, 0.4); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--color-accent); border-color: rgba(139, 92, 246, 0.3); }
.btn-outline:hover { background: var(--color-primary-subtle); border-color: var(--color-primary); color: var(--color-text-bright); }
.btn-secondary { background: var(--color-bg-card); color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { border-color: var(--color-border-hover); color: var(--color-accent); }
.text-link { font-weight: 600; font-size: 0.95rem; color: var(--color-accent); }
.text-link:hover { color: var(--color-primary); }

/* Sections */
.section { padding: 5rem 0; }
.section:nth-child(even) { background: var(--color-bg-elevated); }
.section h2 { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: 1.5rem; color: var(--color-text-bright); }
.section-intro { color: var(--color-text-muted); margin-bottom: 2rem; font-size: 1.05rem; }
.section-cta { margin-top: 2.5rem; text-align: center; }

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }

/* Cards */
.card {
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 2rem;
  transition: all var(--transition); position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0; transition: opacity var(--transition);
}
.card:hover { border-color: var(--color-border-hover); box-shadow: var(--shadow-glow); transform: translateY(-2px); }
.card:hover::before { opacity: 1; }
.card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.75rem; color: var(--color-text-bright); }
.card p { color: var(--color-text-muted); font-size: 0.92rem; line-height: 1.65; }

/* Highlight Card */
.highlight-card {
  background: linear-gradient(135deg, var(--color-bg-card) 0%, rgba(139, 92, 246, 0.05) 100%);
  border: 1px solid var(--color-border-hover); border-radius: var(--radius);
  padding: 3rem; text-align: center; position: relative; overflow: hidden;
}
.highlight-metric { margin-bottom: 1.5rem; }
.metric-value {
  display: block; font-size: 2.5rem; font-weight: 800; letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent), var(--color-success));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.metric-label { font-size: 0.9rem; color: var(--color-text-muted); margin-top: 0.25rem; }
.highlight-card > p { max-width: 600px; margin: 0 auto 1.5rem; color: var(--color-text-muted); line-height: 1.7; }

/* Blog Posts */
.post-card { padding: 1.75rem 0; border-bottom: 1px solid var(--color-border); }
.post-card:last-child { border-bottom: none; }
.post-card h2, .post-card h3 { margin-bottom: 0.25rem; }
.post-card h2 a, .post-card h3 a { color: var(--color-text-bright); }
.post-card h2 a:hover, .post-card h3 a:hover { color: var(--color-accent); }
.post-card time { font-size: 0.8rem; color: var(--color-text-muted); display: block; margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.04em; }
.post-card p { color: var(--color-text-muted); font-size: 0.95rem; margin-bottom: 0.5rem; }

/* Blog Single */
.blog-post { padding: 3rem 0; }
.post-header { margin-bottom: 2.5rem; }
.post-header h1 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1.25; margin-bottom: 0.75rem; color: var(--color-text-bright); }
.post-meta { color: var(--color-text-muted); font-size: 0.9rem; }
.post-meta strong { color: var(--color-accent); }
.post-body h2 { font-size: 1.5rem; margin-top: 3rem; margin-bottom: 0.75rem; color: var(--color-text-bright); }
.post-body h3 { font-size: 1.15rem; margin-top: 2rem; margin-bottom: 0.5rem; color: var(--color-text-bright); }
.post-body p { margin-bottom: 1.25rem; }
.post-body strong { color: var(--color-text-bright); }
.post-body ul, .post-body ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
.post-body li { margin-bottom: 0.5rem; }
.post-body code { background: var(--color-bg-card); padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.88rem; color: var(--color-accent); border: 1px solid var(--color-border); }
.post-body pre { background: var(--color-bg-card); border: 1px solid var(--color-border); color: var(--color-text); padding: 1.5rem; border-radius: var(--radius); overflow-x: auto; margin-bottom: 1.5rem; }
.post-body pre code { background: none; padding: 0; color: inherit; border: none; }
.post-body blockquote { border-left: 3px solid var(--color-primary); padding-left: 1.25rem; margin: 1.5rem 0; color: var(--color-text-muted); font-style: italic; }

/* FAQ */
.faq-section { margin-top: 3rem; padding-top: 2.5rem; border-top: 1px solid var(--color-border); }
.faq-item { margin-bottom: 1.5rem; padding: 1.5rem; background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-sm); transition: border-color var(--transition); }
.faq-item:hover { border-color: var(--color-border-hover); }
.faq-item h3 { font-size: 1.05rem; margin-bottom: 0.5rem; color: var(--color-text-bright); }
.faq-item p { color: var(--color-text-muted); font-size: 0.95rem; line-height: 1.65; }

/* Author Bio */
.author-bio { display: flex; gap: 1.5rem; padding: 2rem; background: var(--color-bg-card); border-radius: var(--radius); border: 1px solid var(--color-border); margin-top: 3rem; }
.author-photo { border-radius: 50%; flex-shrink: 0; object-fit: cover; border: 2px solid var(--color-border-hover); }
.author-info h4 { font-size: 1rem; margin-bottom: 0.5rem; color: var(--color-text-bright); }
.author-info p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.65; margin-bottom: 0.75rem; }
.author-links { display: flex; gap: 0.75rem; }
.author-links a { font-size: 0.85rem; font-weight: 600; color: var(--color-accent); padding: 0.3rem 0.7rem; border-radius: 6px; border: 1px solid var(--color-border); transition: all var(--transition); }
.author-links a:hover { border-color: var(--color-border-hover); background: var(--color-primary-subtle); }

/* Page Content */
.page-content { padding: 3.5rem 0; }
.page-content h1 { font-size: 2.25rem; font-weight: 800; margin-bottom: 1.5rem; letter-spacing: -0.03em; color: var(--color-text-bright); }
.page-content h2 { font-size: 1.5rem; margin-top: 3rem; margin-bottom: 0.75rem; color: var(--color-text-bright); }
.page-content h3 { font-size: 1.15rem; margin-top: 2rem; margin-bottom: 0.5rem; color: var(--color-text-bright); }
.page-content p { margin-bottom: 1.25rem; }
.page-content strong { color: var(--color-text-bright); }
.page-content ul, .page-content ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
.page-content li { margin-bottom: 0.5rem; }
.page-content hr { border: none; border-top: 1px solid var(--color-border); margin: 2.5rem 0; }

/* Contact Form */
.contact-form { max-width: 520px; margin-top: 1.5rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 0.4rem; color: var(--color-text); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.95rem; background: var(--color-bg-card); color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--color-text-muted); }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-glow); }
.form-group textarea { min-height: 140px; resize: vertical; }
.form-group select option { background: var(--color-bg-card); color: var(--color-text); }

/* Footer */
.site-footer { background: var(--color-bg-elevated); border-top: 1px solid var(--color-border); color: var(--color-text-muted); padding: 3.5rem 0 1.5rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2.5rem; margin-bottom: 2rem; }
.site-footer h3 { color: var(--color-text-bright); font-size: 0.95rem; margin-bottom: 0.75rem; font-weight: 700; }
.site-footer p, .site-footer li { font-size: 0.88rem; line-height: 1.7; }
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 0.4rem; }
.site-footer a { color: var(--color-text-muted); }
.site-footer a:hover { color: var(--color-accent); }
.footer-bottom { border-top: 1px solid var(--color-border); padding-top: 1.5rem; font-size: 0.8rem; color: rgba(148, 148, 168, 0.5); }

/* Blog List */
.blog-list { padding: 3.5rem 0; }
.blog-list h1 { font-size: 2.25rem; font-weight: 800; letter-spacing: -0.03em; color: var(--color-text-bright); margin-bottom: 0.5rem; }

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 4rem 0 3rem; }
  .hero h1 { font-size: 2.25rem; }
  .hero-stats { gap: 0.75rem; }
  .stat { min-width: auto; padding: 1rem; }
  .stat-number { font-size: 1.35rem; }
  .section { padding: 3.5rem 0; }
  .section h2 { font-size: 1.5rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .nav-toggle { display: flex; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(10, 10, 15, 0.98); backdrop-filter: blur(16px); border-bottom: 1px solid var(--color-border); flex-direction: column; padding: 1rem 1.5rem; gap: 0.75rem; }
  .nav-links.open { display: flex; }
  .author-bio { flex-direction: column; align-items: center; text-align: center; }
  .author-links { justify-content: center; flex-wrap: wrap; }
  .post-header h1 { font-size: 1.65rem; }
  .highlight-card { padding: 2rem; }
  .metric-value { font-size: 2rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.85rem; }
  .hero-stats { flex-direction: column; gap: 0.75rem; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; text-align: center; }
  .card { padding: 1.5rem; }
}