/* =========================================
   krase.cloud — Design System
   Dark · Fluid · Intentional
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- Variables --- */
:root {
  --bg:           #080808;
  --surface:      #0f0f0f;
  --surface-2:    #141414;
  --border:       #1a1a1a;
  --border-hover: #2a2a2a;
  --accent:       #00C2FF;
  --accent-hover: #00E5FF;
  --accent-glow:  rgba(0, 194, 255, 0.15);
  --accent-dim:   rgba(0, 194, 255, 0.06);
  --text:         #F0F0F0;
  --text-muted:   #666666;
  --text-dim:     #333333;

  --font-title:   'Space Grotesk', sans-serif;
  --font-body:    'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;

  --radius:       8px;
  --radius-lg:    16px;
  --transition:   0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  cursor: none;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: none; font-family: inherit; }

/* --- Custom Cursor --- */
#cursor {
  position: fixed;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width var(--transition-fast), height var(--transition-fast), background var(--transition-fast);
  mix-blend-mode: normal;
}

#cursor-ring {
  position: fixed;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(0, 194, 255, 0.4);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.4s ease;
}

body:has(a:hover) #cursor,
body:has(button:hover) #cursor {
  width: 6px;
  height: 6px;
  background: var(--accent-hover);
}

body:has(a:hover) #cursor-ring,
body:has(button:hover) #cursor-ring {
  width: 50px;
  height: 50px;
  border-color: rgba(0, 229, 255, 0.5);
}

/* --- Grid Background --- */
#grid-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
}

/* --- Layout --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}

/* --- Nav --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 20px 0;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition), padding var(--transition);
}

nav.scrolled {
  background: rgba(8, 8, 8, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  padding: 14px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color var(--transition);
}

.nav-logo span {
  color: var(--accent);
}

.nav-logo:hover { color: var(--accent-hover); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--text);
}

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

/* --- Hero --- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
}

.hero-content {
  max-width: 760px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
  opacity: 0;
}

.hero-tag::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: var(--font-title);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 24px;
  opacity: 0;
}

.hero-title .accent {
  color: var(--accent);
  position: relative;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 48px;
  opacity: 0;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-1px);
}

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

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--text-dim);
  transform: translateY(-1px);
}

/* --- Section --- */
section {
  padding: 100px 0;
  position: relative;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-label::after {
  content: '';
  flex: 1;
  max-width: 40px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.section-title {
  font-family: var(--font-title);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 480px;
  margin-bottom: 56px;
  line-height: 1.7;
}

/* --- Project Cards --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
}

.project-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, var(--accent-dim), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.project-card:hover {
  border-color: rgba(0, 194, 255, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 194, 255, 0.1);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
}

.project-status {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid;
}

.project-status.published  { color: #00C2FF; border-color: rgba(0,194,255,0.3); background: rgba(0,194,255,0.06); }
.project-status.development { color: #f59e0b; border-color: rgba(245,158,11,0.3); background: rgba(245,158,11,0.06); }
.project-status.planning   { color: #a855f7; border-color: rgba(168,85,247,0.3); background: rgba(168,85,247,0.06); }
.project-status.archived   { color: var(--text-dim); border-color: var(--border); background: transparent; }

.project-featured-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.7;
}

.project-name {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.project-description {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--surface-2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  letter-spacing: 0.04em;
}

.project-card-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.project-link {
  font-size: 0.8rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.project-link:hover {
  color: var(--accent-hover);
  gap: 8px;
}

.project-link svg {
  width: 14px;
  height: 14px;
}

/* --- Empty state --- */
.projects-empty {
  text-align: center;
  padding: 80px 0;
  color: var(--text-dim);
}

.projects-empty .mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 12px;
}

/* --- About --- */
#about {
  border-top: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color var(--transition);
}

.stat-card:hover {
  border-color: var(--border-hover);
}

.stat-number {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.footer-logo span { color: var(--accent); }

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-dim);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--text-muted); }

/* --- Divider line --- */
.line-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 30%, var(--border) 70%, transparent);
  margin: 0;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

/* --- Selection --- */
::selection { background: var(--accent-glow); color: var(--accent-hover); }

/* --- Responsive --- */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .nav-links { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .projects-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .hero-cta { flex-direction: column; align-items: flex-start; }
}