/* ===== Vectoora Design System ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --surface-glass: rgba(255,255,255,0.05);
  --border-subtle: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);
  --text-primary: #e8e8f0;
  --text-secondary: #8888a0;
  --text-tertiary: #5a5a72;
  --accent-1: #7c3aed;
  --accent-2: #06b6d4;
  --accent-3: #ec4899;
  --accent-4: #10b981;
  --gradient-hero: linear-gradient(135deg, #7c3aed, #06b6d4);
  --gradient-accent: linear-gradient(135deg, #7c3aed, #ec4899);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 0 40px rgba(124,58,237,0.15);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }
* { scrollbar-width: thin; scrollbar-color: var(--bg-tertiary) var(--bg-primary); }

a { color: var(--accent-2); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-1); }

/* ===== Header ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; height: 64px;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 1.25rem; font-weight: 700;
  color: var(--text-primary); text-decoration: none;
}
.logo svg { width: 28px; height: 28px; }
.logo span {
  background: var(--gradient-hero);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav { display: flex; gap: 0.25rem; }
.main-nav a {
  padding: 0.5rem 0.75rem; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.875rem; font-weight: 500;
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--text-primary); background: var(--surface-glass);
}

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.lang-btn {
  display: flex; align-items: center; gap: 0.35rem;
  padding: 0.4rem 0.75rem; border-radius: var(--radius-sm);
  background: var(--surface-glass); border: 1px solid var(--border-subtle);
  color: var(--text-secondary); cursor: pointer;
  font-size: 0.8rem; font-weight: 500; font-family: var(--font-body);
  transition: var(--transition);
}
.lang-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 0.5rem;
}
.hamburger span {
  display: block; width: 22px; height: 2px; background: var(--text-secondary);
  transition: var(--transition);
}

/* ===== Mobile Nav ===== */
@media (max-width: 768px) {
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0;
    flex-direction: column; padding: 1rem;
    background: rgba(10,10,15,0.95); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-120%); transition: transform 0.3s ease;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav a { padding: 0.75rem 1rem; font-size: 1rem; }
  .hamburger { display: flex; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.25rem; border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.875rem; font-weight: 500;
  cursor: pointer; border: none; transition: var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-hero); color: #fff;
  box-shadow: 0 2px 12px rgba(124,58,237,0.25);
}
.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}
.btn-secondary:hover {
  border-color: var(--border-hover); background: var(--surface-glass);
}
.btn-icon {
  padding: 0.5rem; background: var(--surface-glass);
  border: 1px solid var(--border-subtle); color: var(--text-secondary);
  border-radius: var(--radius-sm); cursor: pointer;
  transition: var(--transition);
}
.btn-icon:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 90vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; overflow: hidden; padding-top: 64px;
}
.hero-bg {
  position: absolute; bottom: 0; left: 0; right: 0;
  width: 100%; pointer-events: none;
}
.hero-bg svg { width: 100%; display: block; }
.hero-content { position: relative; z-index: 2; padding: 2rem; }
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem; line-height: 1.1;
}
.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary); max-width: 540px;
  margin: 0 auto 2rem;
}

@keyframes waveFloat1 { 0%,100%{transform:translateX(0)} 50%{transform:translateX(-25px)} }
@keyframes waveFloat2 { 0%,100%{transform:translateX(0)} 50%{transform:translateX(20px)} }
@keyframes waveFloat3 { 0%,100%{transform:translateX(0)} 50%{transform:translateX(-15px)} }
.wave-layer-1 { animation: waveFloat1 8s ease-in-out infinite; opacity: 0.3; }
.wave-layer-2 { animation: waveFloat2 10s ease-in-out infinite; opacity: 0.2; }
.wave-layer-3 { animation: waveFloat3 12s ease-in-out infinite; opacity: 0.15; }

/* ===== Tools Grid ===== */
.section { padding: 5rem 2rem; max-width: 1200px; margin: 0 auto; }
.section-title {
  font-size: 2rem; font-weight: 700; text-align: center; margin-bottom: 0.75rem;
}
.section-subtitle {
  text-align: center; color: var(--text-secondary); margin-bottom: 3rem;
  font-size: 1.05rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.tool-card {
  display: flex; flex-direction: column; gap: 1rem; padding: 1.75rem;
  background: var(--surface-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer; transition: var(--transition);
  text-decoration: none; color: inherit;
}
.tool-card:hover {
  border-color: var(--accent-1);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.tool-card-icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(6,182,212,0.15));
}
.tool-card-icon svg { width: 24px; height: 24px; }
.tool-card h3 { font-size: 1.1rem; font-weight: 600; }
.tool-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.5; }

/* ===== Features ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem; margin-top: 2rem;
}
.feature-item { text-align: center; padding: 2rem 1.5rem; }
.feature-icon {
  font-size: 2.5rem; margin-bottom: 1rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.feature-item h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; }
.feature-item p { color: var(--text-secondary); font-size: 0.9rem; }

/* ===== Tool Page Layout ===== */
.tool-page { padding-top: 64px; min-height: 100vh; display: flex; flex-direction: column; }
.tool-header {
  padding: 2rem; border-bottom: 1px solid var(--border-subtle);
  text-align: center;
}
.tool-header h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.25rem; }
.tool-header p { color: var(--text-secondary); font-size: 0.9rem; }

.tool-layout {
  display: grid; grid-template-columns: 320px 1fr;
  flex: 1; overflow: hidden;
}

.tool-sidebar {
  padding: 1.5rem; overflow-y: auto;
  border-right: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.tool-main {
  display: flex; flex-direction: column; overflow: hidden;
}

.tool-preview {
  flex: 1; display: flex; align-items: center; justify-content: center;
  background: var(--bg-primary);
  background-image: radial-gradient(circle, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  padding: 2rem; overflow: auto; position: relative;
}

.tool-actions {
  display: flex; gap: 0.75rem; padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .tool-layout { grid-template-columns: 1fr; }
  .tool-sidebar {
    border-right: none; border-bottom: 1px solid var(--border-subtle);
    max-height: 40vh; overflow-y: auto;
  }
}

/* ===== Controls ===== */
.control-group { margin-bottom: 1.25rem; }
.control-label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.8rem; font-weight: 500; color: var(--text-secondary);
  margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.05em;
}
.control-value {
  font-variant-numeric: tabular-nums; color: var(--text-tertiary);
}

/* Range slider */
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 3px;
  background: var(--bg-tertiary); outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff; cursor: pointer;
  box-shadow: 0 0 8px rgba(124,58,237,0.4);
  border: 2px solid var(--accent-1);
}
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff; cursor: pointer;
  box-shadow: 0 0 8px rgba(124,58,237,0.4);
  border: 2px solid var(--accent-1);
}

/* Color picker */
.color-picker-wrap {
  display: flex; align-items: center; gap: 0.5rem;
}
input[type="color"] {
  -webkit-appearance: none; appearance: none;
  width: 36px; height: 36px; border: 2px solid var(--border-subtle);
  border-radius: var(--radius-sm); cursor: pointer;
  background: transparent; padding: 2px;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch {
  border: none; border-radius: 4px;
}

/* Segmented control */
.segmented {
  display: flex; border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle); overflow: hidden;
}
.segmented label {
  flex: 1; text-align: center; padding: 0.5rem 0.75rem;
  font-size: 0.8rem; font-weight: 500; cursor: pointer;
  color: var(--text-secondary); transition: var(--transition);
  border-right: 1px solid var(--border-subtle);
}
.segmented label:last-child { border-right: none; }
.segmented input { display: none; }
.segmented input:checked + label,
.segmented label.active {
  background: var(--gradient-hero); color: #fff;
}

/* Toggle switch */
.toggle-wrap { display: flex; align-items: center; gap: 0.75rem; }
.toggle {
  position: relative; width: 44px; height: 24px;
  background: var(--bg-tertiary); border-radius: 12px;
  cursor: pointer; transition: var(--transition);
  border: 1px solid var(--border-subtle);
}
.toggle input { display: none; }
.toggle .slider {
  position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--text-secondary); transition: var(--transition);
}
.toggle input:checked ~ .slider {
  transform: translateX(20px); background: var(--accent-2);
}
.toggle input:checked ~ .toggle-bg {
  background: rgba(6,182,212,0.2);
}

/* Text input */
.text-input {
  width: 100%; padding: 0.5rem 0.75rem;
  background: var(--bg-tertiary); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-family: var(--font-body); font-size: 0.875rem;
  outline: none; transition: var(--transition);
}
.text-input:focus { border-color: var(--accent-1); }

textarea.text-input {
  min-height: 80px; resize: vertical;
  font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.8rem;
}

/* ===== Toast ===== */
.toast {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(100px);
  padding: 0.75rem 1.5rem; border-radius: var(--radius-sm);
  background: rgba(18,18,26,0.9); backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle); color: var(--text-primary);
  font-size: 0.875rem; font-weight: 500;
  box-shadow: var(--shadow-card); z-index: 9999;
  opacity: 0; transition: all 0.3s ease; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Footer ===== */
.site-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.5rem 2rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-tertiary); font-size: 0.8rem;
}
.site-footer nav { display: flex; gap: 1.5rem; }
.site-footer a { color: var(--text-tertiary); }
.site-footer a:hover { color: var(--text-secondary); }

@media (max-width: 768px) {
  .site-footer { flex-direction: column; gap: 0.75rem; text-align: center; }
}

/* ===== Content Pages ===== */
.content-page {
  padding: calc(64px + 3rem) 2rem 3rem;
  max-width: 720px; margin: 0 auto; min-height: 80vh;
}
.content-page h1 {
  font-size: 2rem; font-weight: 700; margin-bottom: 1.5rem;
  background: var(--gradient-hero);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.content-page h2 {
  font-size: 1.25rem; font-weight: 600; margin: 2rem 0 0.75rem;
  color: var(--text-primary);
}
.content-page p {
  color: var(--text-secondary); margin-bottom: 1rem; line-height: 1.7;
}
.content-page ul {
  list-style: none; padding: 0; margin-bottom: 1.5rem;
}
.content-page ul li {
  padding: 0.5rem 0; padding-left: 1.5rem; position: relative;
  color: var(--text-secondary);
}
.content-page ul li::before {
  content: ''; position: absolute; left: 0; top: 0.9rem;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--gradient-hero);
}

/* ===== Pattern Type Grid ===== */
.pattern-type-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem;
}
.pattern-type-btn {
  aspect-ratio: 1; border-radius: var(--radius-sm);
  border: 2px solid var(--border-subtle);
  background: var(--bg-tertiary); cursor: pointer;
  transition: var(--transition); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.pattern-type-btn:hover { border-color: var(--border-hover); }
.pattern-type-btn.active { border-color: var(--accent-1); box-shadow: 0 0 12px rgba(124,58,237,0.2); }
.pattern-type-btn svg { width: 100%; height: 100%; }

/* ===== Gradient Presets ===== */
.preset-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.5rem;
}
.preset-swatch {
  aspect-ratio: 1.5; border-radius: var(--radius-sm);
  cursor: pointer; border: 2px solid transparent;
  transition: var(--transition);
}
.preset-swatch:hover { border-color: var(--border-hover); transform: scale(1.05); }

/* ===== Color Stops ===== */
.color-stops-list { display: flex; flex-direction: column; gap: 0.5rem; }
.color-stop-row {
  display: flex; align-items: center; gap: 0.5rem;
}
.color-stop-row .remove-stop {
  width: 24px; height: 24px; border-radius: 50%;
  background: none; border: 1px solid var(--border-subtle);
  color: var(--text-tertiary); cursor: pointer; font-size: 0.75rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.color-stop-row .remove-stop:hover {
  border-color: var(--accent-3); color: var(--accent-3);
}

/* ===== Path Editor ===== */
.path-toolbar {
  display: flex; gap: 0.5rem; padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-secondary); flex-wrap: wrap;
}
.path-toolbar .btn-icon.active {
  background: var(--gradient-hero); color: #fff;
  border-color: transparent;
}
.path-canvas-area {
  flex: 1; position: relative; cursor: crosshair; overflow: hidden;
}
.path-canvas-area svg {
  width: 100%; height: 100%; display: block;
}

/* ===== Angle Presets ===== */
.angle-presets {
  display: flex; gap: 0.35rem; flex-wrap: wrap;
}
.angle-preset-btn {
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  background: var(--bg-tertiary); border: 1px solid var(--border-subtle);
  color: var(--text-secondary); cursor: pointer; font-size: 0.85rem;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.angle-preset-btn:hover { border-color: var(--border-hover); color: var(--text-primary); }

/* ===== Utility ===== */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.gap-sm { gap: 0.5rem; }
.flex-row { display: flex; align-items: center; }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px); z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.modal-overlay.show { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 2rem;
  max-width: 500px; width: 90%;
}
.modal h2 { font-size: 1.1rem; margin-bottom: 1rem; }
.modal-actions { display: flex; gap: 0.75rem; margin-top: 1.5rem; justify-content: flex-end; }