@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --bg: #0f0f13;
  --card: #1a1a2e;
  --card-hover: #222240;
  --border: #2a2a3e;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --accent-1: #06b6d4;
  --accent-2: #0891b2;
  --accent-3: #0e7490;
  --gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-3));
  --gradient-text: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
  --font: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

/* -- Nav -- */
nav {
  background: rgba(15, 15, 19, .9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.logo-icon {
  font-size: 1.5rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 500;
  transition: color .2s, background .2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-1);
  background: rgba(6, 182, 212, .08);
}

/* -- Hero -- */
.hero {
  text-align: center;
  padding: 60px 0 20px;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* -- Ad Slot -- */
.ad-slot {
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: .85rem;
  margin: 24px 0;
}

/* -- Tool Card -- */
.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

/* -- Upload Area -- */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .3s, background .3s, box-shadow .3s;
  position: relative;
}

.upload-area:hover {
  border-color: var(--accent-1);
  background: rgba(6, 182, 212, .04);
  box-shadow: 0 0 24px rgba(6, 182, 212, .1);
}

.upload-area.dragover {
  border-color: var(--accent-1);
  background: rgba(6, 182, 212, .08);
  box-shadow: 0 0 32px rgba(6, 182, 212, .15);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.upload-area p {
  color: var(--text-muted);
  margin-bottom: 4px;
}

.upload-hint {
  font-size: .8rem;
  color: var(--text-muted);
  opacity: .7;
  margin-top: 8px !important;
}

.upload-area input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

/* -- File Info -- */
.file-info {
  display: none;
  align-items: center;
  gap: 12px;
  background: rgba(6, 182, 212, .06);
  border: 1px solid rgba(6, 182, 212, .2);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 20px;
}

.file-info.show {
  display: flex;
}

.file-icon {
  font-size: 1.5rem;
}

.file-details {
  flex: 1;
  min-width: 0;
}

.file-name {
  font-weight: 600;
  font-size: .95rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  color: var(--text-muted);
  font-size: .8rem;
}

.file-remove {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color .2s;
}

.file-remove:hover {
  color: #ef4444;
}

/* -- Options -- */
.options-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

.option-group {
  flex: 1;
  min-width: 200px;
}

.option-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: .9rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: border-color .2s;
}

select:focus {
  outline: none;
  border-color: var(--accent-1);
}

/* -- Buttons -- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform .15s, box-shadow .2s, opacity .2s;
}

.btn:active {
  transform: scale(.97);
}

.btn:disabled {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  width: 100%;
  background: var(--gradient);
  color: #000;
  padding: 14px 28px;
  font-size: 1.05rem;
  box-shadow: 0 4px 16px rgba(6, 182, 212, .25);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: 0 6px 24px rgba(6, 182, 212, .35);
  transform: translateY(-1px);
}

/* -- Progress Bar -- */
.progress-bar {
  display: none;
  width: 100%;
  height: 6px;
  background: var(--bg);
  border-radius: 3px;
  margin-top: 20px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
  width: 0%;
  transition: width .3s ease;
}

/* -- Status Messages -- */
.status-msg {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  margin-top: 16px;
}

.status-msg.show {
  display: flex;
}

.status-msg.loading {
  background: rgba(6, 182, 212, .08);
  border: 1px solid rgba(6, 182, 212, .2);
  color: var(--accent-1);
}

.status-msg.success {
  background: rgba(34, 197, 94, .08);
  border: 1px solid rgba(34, 197, 94, .2);
  color: #22c55e;
}

.status-msg.error {
  background: rgba(239, 68, 68, .08);
  border: 1px solid rgba(239, 68, 68, .2);
  color: #ef4444;
}

/* -- Spinner -- */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(6, 182, 212, .3);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  flex-shrink: 0;
}

/* -- Result Area -- */
.result-area {
  display: none;
  margin-top: 24px;
}

.result-area.show {
  display: block;
}

.result-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  text-align: center;
  padding: 16px;
}

.result-card canvas {
  display: block;
  margin: 0 auto 16px;
}

.result-info {
  display: flex;
  justify-content: center;
  gap: 24px;
  padding: 12px 16px;
  font-size: .9rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.result-info strong {
  color: var(--accent-1);
}

.btn-download {
  padding: 10px 24px;
  background: var(--gradient);
  color: #000;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: box-shadow .2s, transform .15s;
  margin-top: 8px;
}

.btn-download:hover {
  box-shadow: 0 4px 16px rgba(6, 182, 212, .25);
  transform: translateY(-1px);
}

/* -- How-to Section -- */
.how-to {
  padding: 48px 0;
  text-align: center;
}

.how-to h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 32px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: border-color .2s, transform .2s;
}

.step:hover {
  border-color: var(--accent-1);
  transform: translateY(-2px);
}

.step-number {
  width: 44px;
  height: 44px;
  background: var(--gradient);
  color: #000;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.step h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.step p {
  color: var(--text-muted);
  font-size: .9rem;
}

/* -- Features -- */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 20px 0 48px;
}

.feature {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .2s, transform .2s;
}

.feature:hover {
  border-color: var(--accent-1);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature p {
  color: var(--text-muted);
  font-size: .9rem;
}

/* -- FAQ -- */
.faq {
  padding: 20px 0 48px;
}

.faq h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--card);
}

.faq-q {
  padding: 16px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: .95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color .2s;
  user-select: none;
}

.faq-q::after {
  content: '\25BC';
  font-size: .7rem;
  color: var(--text-muted);
  transition: transform .3s;
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-q:hover {
  color: var(--accent-1);
}

.faq-item.open .faq-q::after {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
}

.faq-item.open .faq-a {
  max-height: 200px;
  padding: 0 20px 16px;
}

.faq-a p {
  color: var(--text-muted);
  font-size: .9rem;
  line-height: 1.6;
}

/* -- Footer -- */
footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: rgba(15, 15, 19, .9);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  color: var(--text-muted);
  font-size: .85rem;
}

.footer-links {
  display: flex;
  list-style: none;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: .85rem;
  transition: color .2s;
}

.footer-links a:hover {
  color: var(--accent-1);
}

/* -- Content Pages -- */
.page-content {
  padding: 48px 0;
}

.page-content h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--accent-1);
}

.page-content p {
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.page-content ul {
  color: var(--text-muted);
  margin-bottom: 16px;
  padding-left: 24px;
}

.page-content li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

/* -- Contact Form -- */
.contact-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 600px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: .9rem;
  transition: border-color .2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-1);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}

.form-success.show {
  display: block;
}

.form-success .success-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.form-success h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.form-success p {
  color: var(--text-muted);
}

/* -- Responsive -- */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 12px 20px;
  }

  .nav-links.open {
    display: flex;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: .95rem;
  }

  .tool-card {
    padding: 20px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .result-info {
    flex-direction: column;
    gap: 8px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 40px 0 16px;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .tool-card {
    padding: 16px;
  }

  .upload-area {
    padding: 32px 16px;
  }

  .upload-icon {
    font-size: 2.5rem;
  }

  .btn-primary {
    padding: 12px 20px;
    font-size: .95rem;
  }

  .contact-form {
    padding: 20px;
  }
}