/* ============================================
   gdrive-linkgenerator.com - Main Stylesheet
   ============================================ */

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --secondary: #34a853;
  --accent: #fbbc04;
  --danger: #ea4335;
  --dark: #202124;
  --gray-900: #3c4043;
  --gray-700: #5f6368;
  --gray-500: #9aa0a6;
  --gray-300: #dadce0;
  --gray-100: #f1f3f4;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(60,64,67,0.1);
  --shadow-md: 0 4px 12px rgba(60,64,67,0.15);
  --shadow-lg: 0 8px 24px rgba(60,64,67,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1200px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--gray-100);
  color: var(--dark);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Navigation */
.header {
  background: var(--white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--dark);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--gray-700);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray-700);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #4285f4 50%, var(--secondary) 100%);
  color: var(--white);
  padding: 64px 24px;
  text-align: center;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto;
}

/* Ad Slots */
.ad-slot {
  background: var(--white);
  border: 1px dashed var(--gray-300);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-500);
  font-size: 0.85rem;
  margin: 24px auto;
  max-width: var(--max-width);
}

.ad-slot.banner {
  height: 90px;
}

.ad-slot.rectangle {
  height: 280px;
  max-width: 336px;
}

.ad-slot.leaderboard {
  height: 90px;
}

/* Main Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Tool Section */
.tool-section {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 40px;
  margin: -40px auto 40px;
  position: relative;
  z-index: 10;
  max-width: 900px;
}

.tool-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  border-bottom: 2px solid var(--gray-100);
  padding-bottom: 2px;
}

.tab-btn {
  padding: 12px 24px;
  border: none;
  background: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab-btn:hover {
  color: var(--primary);
  background: var(--gray-100);
}

.tab-btn.active {
  color: var(--primary);
  background: var(--gray-100);
  border-bottom: 3px solid var(--primary);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

/* Form Elements */
.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--gray-900);
  font-size: 0.95rem;
}

.input-hint {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.text-input,
.textarea-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font);
  transition: border-color 0.2s, box-shadow 0.2s;
  background: var(--white);
}

.text-input:focus,
.textarea-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.1);
}

.textarea-input {
  min-height: 180px;
  resize: vertical;
}

.btn {
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-900);
}

.btn-secondary:hover {
  background: var(--gray-300);
}

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

.btn-success:hover {
  background: #2d8a47;
}

.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Results */
.result-box {
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 20px;
  margin-top: 24px;
  border-left: 4px solid var(--secondary);
}

.result-box h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.result-url {
  background: var(--white);
  padding: 14px;
  border-radius: var(--radius-sm);
  font-family: 'SF Mono', monospace;
  font-size: 0.9rem;
  word-break: break-all;
  border: 1px solid var(--gray-300);
  margin-bottom: 12px;
  color: var(--primary);
}

.result-list {
  list-style: none;
}

.result-list li {
  background: var(--white);
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-300);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.result-list .url-text {
  font-family: 'SF Mono', monospace;
  font-size: 0.85rem;
  color: var(--primary);
  word-break: break-all;
  flex: 1;
}

.result-list .file-name {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-bottom: 4px;
}

.copy-btn {
  padding: 8px 16px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.status-success {
  background: #e6f4ea;
  color: #1e8e3e;
}

.status-error {
  background: #fce8e8;
  color: #d93025;
}

.hidden {
  display: none !important;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--dark);
  color: var(--white);
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Content Sections */
.content-section {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 48px;
  margin-bottom: 32px;
}

.content-section h2 {
  font-size: 1.85rem;
  color: var(--dark);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--gray-100);
}

.content-section h3 {
  font-size: 1.3rem;
  color: var(--gray-900);
  margin: 28px 0 14px;
}

.content-section h4 {
  font-size: 1.1rem;
  color: var(--gray-900);
  margin: 20px 0 10px;
}

.content-section p {
  margin-bottom: 16px;
  color: var(--gray-700);
  font-size: 1.02rem;
}

.content-section ul,
.content-section ol {
  margin: 0 0 20px 24px;
  color: var(--gray-700);
}

.content-section li {
  margin-bottom: 10px;
  font-size: 1.02rem;
}

/* Feature Cards */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 32px 0;
}

.feature-card {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), #4285f4);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--white);
  font-size: 1.5rem;
}

.feature-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--dark);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--gray-700);
  margin: 0;
}

/* Steps */
.steps {
  display: flex;
  gap: 16px;
  margin: 28px 0;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 200px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}

.step-number {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 12px;
}

.step h4 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  font-size: 0.95rem;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--gray-300);
  padding: 20px 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--dark);
  margin-bottom: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
}

.faq-answer {
  color: var(--gray-700);
  padding-left: 32px;
}

/* Contact Page */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  margin-top: 0;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--gray-100);
  border-radius: var(--radius-sm);
}

.contact-item .icon {
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: var(--white);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item strong {
  display: block;
  color: var(--dark);
  margin-bottom: 2px;
}

.contact-item span {
  color: var(--gray-700);
  font-size: 0.95rem;
}

.contact-form .input-group {
  margin-bottom: 16px;
}

/* Footer */
.footer {
  background: var(--dark);
  color: var(--gray-500);
  padding: 48px 24px 24px;
  margin-top: auto;
}

.footer-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  margin-top: 12px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--gray-900);
  text-align: center;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 16px 24px;
    box-shadow: var(--shadow-md);
    gap: 0;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links li {
    border-bottom: 1px solid var(--gray-100);
  }
  .nav-links a {
    display: block;
    padding: 14px 0;
  }
  .nav-links a.active::after {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .hero h1 {
    font-size: 1.9rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .tool-section {
    padding: 24px;
    margin: -20px 16px 32px;
  }
  .content-section {
    padding: 28px;
  }
  .steps {
    flex-direction: column;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .ad-slot.banner,
  .ad-slot.leaderboard {
    height: auto;
    min-height: 60px;
  }
}

/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--gray-500);
}

.breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-500);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-700);
}