:root {
  --bg: #0a0a0a;
  --surface: #1a1a1a;
  --text: #f5f5f5;
  --text-secondary: #9ca3af;
  --accent: #00fafa;
  --accent-hover: #00a1bd;
  --border: #2a2a2a;
  --shadow: rgba(0, 0, 0, 0.5);
  --header-blur: rgba(10, 10, 10, 0.8);
  --hero-bg: url("assets/background.webp");
  --ai-bg: url("assets/background.webp");
  --success: #34d399;
}

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

html {
  overflow-y: auto;
  scroll-behavior: smooth;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition:
    background 0.3s ease,
    color 0.3s ease;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--header-blur);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo img {
  display: block;
  height: 42px;
  width: auto;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 0;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
}

.nav-btn::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}
.nav-btn:hover {
  color: var(--accent);
}

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-image: var(--hero-bg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  transition: background-image 0.3s ease;
  padding: 40px 0 80px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--bg);
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  width: 100%;
}

.hero-left h1 {
  font-family: "Righteous", sans-serif;
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-left p {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-right {
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 104px);
  overflow-y: auto;
}

.editor-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 4px 20px var(--shadow);
  transition: all 0.3s ease;
}

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: var(--bg);
}

.upload-zone.dragover {
  border-color: var(--accent);
  background: var(--accent);
  opacity: 0.1;
}

.upload-zone svg {
  color: var(--accent);
  margin-bottom: 16px;
}

.upload-text {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.svg-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  max-height: 200px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 20px;
  overflow: hidden;
}

.svg-preview svg {
  max-width: 100%;
  max-height: 180px;
  width: auto;
  height: auto;
}

.control-section {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.control-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}

.control-section h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.type-select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  margin-bottom: 12px;
  transition: all 0.2s ease;
}

.type-select:focus {
  outline: none;
  border-color: var(--accent);
}

.sub-controls {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.color-input-group {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
  position: relative;
}

.color-input-group label {
  font-size: 12px;
  color: var(--text-secondary);
  min-width: 50px;
}

.color-input-group input[type="color"] {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  background: transparent;
}

.color-input-group input[type="text"] {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 12px;
  font-family: "Courier New", monospace;
  transition: all 0.2s ease;
}

.color-input-group input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.color-input-group .remove-color {
  width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.color-input-group .remove-color:hover {
  background: #ef4444;
  border-color: #ef4444;
  color: white;
}

.gradient-colors {
  margin-bottom: 12px;
  max-height: 300px;
  overflow-y: auto;
}

.btn-add-color {
  width: 100%;
  padding: 8px;
  background: transparent;
  border: 1px dashed var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-bottom: 12px;
  transition: all 0.2s ease;
}

.btn-add-color:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--surface);
}

.angle-control,
.stroke-width-control {
  margin-bottom: 10px;
}

.angle-control label,
.stroke-width-control label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.angle-control input[type="range"],
.stroke-width-control input[type="range"] {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  -webkit-appearance: none;
}

.angle-control input[type="range"]::-webkit-slider-thumb,
.stroke-width-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: all 0.2s ease;
}

.angle-control input[type="range"]::-webkit-slider-thumb:hover,
.stroke-width-control input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.angle-control input[type="range"]::-moz-range-thumb,
.stroke-width-control input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

.action-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr 42px 42px;
  gap: 8px;
  margin-top: 20px;
}

.btn-primary,
.btn-secondary {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--accent);
}

.btn-secondary.copied {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.btn-icon {
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--bg);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-icon#resetBtn:hover {
  transform: rotate(-180deg);
}

.btn-icon#clearBtn:hover {
  background: #ef4444;
  border-color: #ef4444;
  color: white;
}

.how-it-works {
  padding: 120px 0;
  background: var(--surface);
}
.how-it-works h2 {
  font-family: "Righteous", sans-serif;
  text-align: center;
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 64px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.step {
  text-align: center;
  padding: 32px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.3s ease;
}

.step:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 24px var(--shadow);
}

.step-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border-radius: 16px;
  color: var(--accent);
  transition: all 0.3s ease;
}

.step:hover .step-icon {
  background: var(--accent);
  color: white;
}

.step h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ai-enhancer {
  padding: 100px 0;
  background-image: var(--ai-bg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  overflow: hidden;
}

.ai-enhancer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  opacity: 0.95;
}

.ai-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.ai-text h2 {
  font-family: "Righteous", sans-serif;
  font-size: 40px;
  font-weight: 700;
  color: rgb(0, 0, 0);
  margin-bottom: 16px;
}

.ai-text p {
  font-size: 18px;
  color: rgba(0, 0, 0, 0.9);
  line-height: 1.7;
}

.btn-try-now {
  padding: 16px 40px;
  background: white;
  color: var(--accent-hover);
  font-size: 16px;
  font-weight: 600;
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.2s ease;
  display: inline-block;
}

.btn-try-now:hover {
  background: #0a0a0a;
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

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

.footer-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.powered-by {
  display: flex;
  align-items: center;
  gap: 8px;
}

.powered-by span {
  color: var(--text-secondary);
  font-size: 12px;
}

.powered-by img {
  height: 20px;
  width: auto;
}
.powered-by a {
  display: flex;
  align-items: center;
  transition: opacity 0.2s ease;
}

.powered-by a:hover {
  opacity: 0.7;
}

.footer-content p {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 0;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

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

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-right {
    position: static;
    max-height: none;
    overflow-y: visible;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ai-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .nav-btn {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 80px 0 60px;
  }

  .hero-grid {
    padding: 0;
  }

  .hero-left h1 {
    font-size: 36px;
  }

  .hero-left p {
    font-size: 16px;
  }

  .editor-card {
    padding: 20px;
  }

  .upload-zone {
    padding: 40px 20px;
  }

  .how-it-works {
    padding: 80px 0;
  }

  .how-it-works h2 {
    font-size: 32px;
    margin-bottom: 48px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .ai-enhancer {
    padding: 60px 0;
  }

  .ai-text h2 {
    font-size: 32px;
  }

  .ai-text p {
    font-size: 16px;
  }

  .footer-content {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-left {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .header-content {
    justify-content: center;
    height: 64px;
  }

  .hero-left h1 {
    font-size: 28px;
  }

  .editor-card {
    padding: 16px;
  }

  .action-buttons {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 10px 12px;
    font-size: 12px;
    gap: 4px;
  }

  .btn-primary svg,
  .btn-secondary svg {
    width: 14px;
    height: 14px;
  }
}