/* ============================================
   ToolFlow — Design System
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* --- Custom Properties --- */
:root {
  --primary: #0f4c75;
  --primary-dark: #0b3954;
  --primary-light: #3282b8;
  --primary-ultra-light: #bbe1fa;
  --accent-gradient: linear-gradient(135deg, #0f4c75 0%, #3282b8 50%, #0f4c75 100%);
  --accent-gradient-hover: linear-gradient(135deg, #3282b8 0%, #0f4c75 50%, #3282b8 100%);
  --surface: #ffffff;
  --background: #f7f9fc;
  --background-alt: #eef2f7;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --border: #e5e7eb;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --shadow-sm: 0 1px 3px rgba(15,76,117,0.06);
  --shadow-md: 0 4px 16px rgba(15,76,117,0.08);
  --shadow-lg: 0 8px 32px rgba(15,76,117,0.12);
  --shadow-xl: 0 16px 48px rgba(15,76,117,0.16);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 720px;
  --nav-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; font-family: inherit; }
input, textarea { font-family: inherit; }

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-size: 1.35rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.navbar-links a {
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--primary);
  background: var(--background);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Main App Container --- */
#app {
  margin-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
}

.page-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 60px;
}

/* --- View Transitions --- */
.view-enter {
  animation: viewIn 0.35s ease forwards;
}

@keyframes viewIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Hero Section --- */
.hero {
  text-align: center;
  padding: 48px 0 40px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--primary-ultra-light);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}

.hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 14px;
  letter-spacing: -1px;
}

.hero h1 span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

/* --- Featured Upload Area --- */
.featured-upload {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.featured-upload::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}

.featured-upload:hover,
.featured-upload.drag-over {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
}

.featured-upload.drag-over::before { opacity: 0.04; }

.featured-upload-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.featured-upload h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.featured-upload p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --- Search Bar --- */
.search-wrapper {
  position: relative;
  margin-bottom: 24px;
}

.search-bar {
  width: 100%;
  padding: 14px 20px 14px 48px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
  background: var(--surface);
  font-size: 0.95rem;
  color: var(--text);
  transition: var(--transition);
  outline: none;
}

.search-bar:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(50,130,184,0.1);
}

.search-bar::placeholder { color: var(--text-light); }

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 1.1rem;
  pointer-events: none;
}

/* --- Category Filters --- */
.category-filters {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-pill {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--surface);
  color: var(--text-muted);
  border: 1.5px solid var(--border);
  transition: var(--transition-fast);
}

.filter-pill:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.filter-pill.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* --- Tool Cards --- */
.tool-cards-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tool-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}

.tool-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--primary-ultra-light);
}

.tool-card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  background: var(--background);
  transition: var(--transition);
}

.tool-card:hover .tool-card-icon {
  background: var(--primary-ultra-light);
  transform: scale(1.08);
}

.tool-card-info { flex: 1; min-width: 0; }

.tool-card-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text);
}

.tool-card-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.tool-card-btn {
  padding: 10px 22px;
  background: var(--accent-gradient);
  background-size: 200% 200%;
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  transition: var(--transition);
  flex-shrink: 0;
}

.tool-card-btn:hover {
  background-position: 100% 0;
  box-shadow: 0 4px 16px rgba(15,76,117,0.3);
  transform: scale(1.04);
}

.category-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary-light);
  margin-bottom: 12px;
  margin-top: 24px;
  padding-left: 4px;
}

.no-results {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-muted);
}

.no-results span { font-size: 2.5rem; display: block; margin-bottom: 12px; }

/* --- Tool View --- */
.tool-view { padding: 32px 0; }

.tool-view-header {
  text-align: center;
  margin-bottom: 32px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 24px;
  transition: var(--transition-fast);
}

.back-btn:hover { color: var(--primary); border-color: var(--primary-light); }

.tool-view-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.tool-view-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.tool-view-header p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* --- Upload Zone --- */
.upload-zone {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  margin-bottom: 24px;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--primary-light);
  background: rgba(50,130,184,0.03);
}

.upload-zone-icon { font-size: 2.5rem; margin-bottom: 12px; display: block; }

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

.upload-zone p { font-size: 0.85rem; color: var(--text-muted); }

.upload-zone input[type="file"] { display: none; }

/* Text input area for text tools */
.text-input-area {
  width: 100%;
  min-height: 200px;
  padding: 20px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--surface);
  resize: vertical;
  outline: none;
  transition: var(--transition);
  margin-bottom: 16px;
}

.text-input-area:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(50,130,184,0.1);
}

.text-input-area::placeholder { color: var(--text-light); }

/* QR / URL input */
.tool-input {
  width: 100%;
  padding: 14px 20px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: var(--transition);
  margin-bottom: 16px;
}

.tool-input:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 4px rgba(50,130,184,0.1);
}

/* Options row (e.g. resize dimensions) */
.options-row {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.options-row .tool-input { flex: 1; min-width: 120px; }

/* --- Buttons --- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent-gradient);
  background-size: 200% 200%;
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  min-height: 48px;
}

.btn-primary:hover {
  background-position: 100% 0;
  box-shadow: 0 6px 24px rgba(15,76,117,0.3);
  transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0) scale(0.98); }

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--surface);
  color: var(--primary);
  border: 1.5px solid var(--primary-light);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
  min-height: 48px;
}

.btn-secondary:hover {
  background: var(--primary-ultra-light);
}

/* --- Processing State --- */
.processing-state {
  text-align: center;
  padding: 48px 20px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.processing-state p {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* --- Result Area --- */
.result-area {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-top: 24px;
}

.result-area h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 8px;
}

.result-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.result-stat {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-stat strong {
  color: var(--text);
  font-weight: 600;
}

.result-preview {
  background: var(--background);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 20px;
  max-height: 300px;
  overflow: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
}

.result-preview img {
  max-width: 100%;
  max-height: 250px;
  margin: 0 auto;
  border-radius: var(--radius-sm);
}

.result-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  top: calc(var(--nav-height) + 12px);
  right: 16px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.35s ease forwards;
  max-width: 360px;
}

.toast.success { background: var(--success); }
.toast.error { background: var(--error); }
.toast.warning { background: var(--warning); color: var(--text); }

.toast.removing { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateX(40px); } }

/* --- Ad Placeholder --- */
.ad-placeholder {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  color: var(--text-light);
  font-size: 0.8rem;
  margin: 32px 0;
  background: var(--background-alt);
}

/* --- Footer --- */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 20px 24px;
  margin-top: 60px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 10px;
  transition: var(--transition-fast);
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.8rem;
}

/* --- About & Contact Pages --- */
.static-page { padding: 48px 0; }

.static-page h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.static-page p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.contact-form { max-width: 500px; }

.contact-form .tool-input,
.contact-form .text-input-area { margin-bottom: 12px; }

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
  .navbar-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }

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

  .navbar-links a {
    padding: 14px 16px;
    font-size: 1rem;
    width: 100%;
    border-radius: var(--radius-md);
    text-align: center;
  }

  .hamburger { display: flex; }

  .hero { padding: 32px 0 24px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; margin-bottom: 24px; }

  .tool-card {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 16px;
    padding: 20px;
  }
  
  .tool-card-icon {
    margin: 0 auto;
    width: 64px;
    height: 64px;
    font-size: 2rem;
  }

  .tool-card-btn {
    width: 100%;
    text-align: center;
    padding: 12px;
  }

  .featured-upload { padding: 36px 20px; }
  .upload-zone { padding: 40px 20px; }
  
  .result-stats { flex-direction: column; gap: 8px; align-items: flex-start; }
  .result-actions { flex-direction: column; width: 100%; }
  .result-actions button { width: 100%; margin-left: 0; }

  .footer { padding: 40px 20px 20px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; text-align: center; }
  .footer-col h4 { margin-bottom: 12px; }
  
  .options-row { flex-direction: column; gap: 12px; }
  .options-row .tool-input { width: 100%; }
}

@media (max-width: 480px) {
  .page-container { padding: 16px 16px 40px; }
  .hero h1 { font-size: 1.6rem; }
  .hero p { font-size: 0.9rem; }
  .category-filters { gap: 8px; justify-content: center; }
  .filter-pill { padding: 8px 16px; font-size: 0.85rem; flex: 1; text-align: center; min-width: 45%; }
  
  .toast-container { right: 16px; left: 16px; align-items: center; }
  .toast { max-width: none; width: 100%; text-align: center; }
  
  @keyframes toastIn { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
  @keyframes toastOut { to { opacity: 0; transform: translateY(-20px); } }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Utility --- */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }