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

:root {
  --blue: #0c6dd5;
  --blue-dark: #0a5bb3;
  --blue-light: #e8f2fc;
  --blue-50: #f0f7ff;
  --dark: #171D3A;
  --gray-900: #1a1a2e;
  --gray-700: #4a4a6a;
  --gray-500: #888;
  --gray-400: #aaa;
  --gray-300: #ccc;
  --gray-200: #e5e5e5;
  --gray-100: #f0f0f0;
  --gray-50: #fafafa;
  --white: #fff;
  --green: #10b981;
  --green-light: #d1fae5;
  --orange: #f59e0b;
  --orange-light: #fef3c7;
  --red: #ef4444;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.1), 0 8px 24px rgba(0,0,0,0.06);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Urbanist', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

img { max-width: 100%; display: block; }

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

/* ===== Animations ===== */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.04);
  transition: var(--transition);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: var(--dark);
}

.logo-icon { color: var(--blue); }
.logo-text { letter-spacing: -0.3px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  transition: color var(--transition);
}

.nav-link:hover { color: var(--blue); }

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 16px;
  padding: 16px 24px 24px;
  border-top: 1px solid var(--gray-200);
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Urbanist', sans-serif;
  font-weight: 600;
  font-size: 15px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-nav {
  background: var(--blue);
  color: var(--white);
  padding: 8px 20px;
  border-radius: var(--radius-sm);
}

.btn-nav:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(12, 109, 213, 0.3);
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
  padding: 12px 28px;
}

.btn-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(12, 109, 213, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--gray-700);
  padding: 12px 28px;
  border: 1px solid var(--gray-200);
}

.btn-ghost:hover {
  border-color: var(--gray-300);
  background: var(--gray-50);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
  border-radius: var(--radius-md);
}

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

.btn-white:hover {
  background: var(--gray-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,255,255,0.3);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--blue-50) 0%, var(--white) 100%);
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.4;
  filter: blur(80px);
}

.shape-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(12, 109, 213, 0.15), transparent 70%);
  top: -200px;
  right: -100px;
}

.shape-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1), transparent 70%);
  bottom: -100px;
  left: -100px;
}

.shape-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(12, 109, 213, 0.08), transparent 70%);
  top: 50%;
  left: 40%;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}

.hero-title {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero-line { display: block; }

.hero-accent {
  background: linear-gradient(135deg, var(--blue) 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--gray-700);
  max-width: 480px;
  margin-bottom: 32px;
  line-height: 1.7;
}

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

/* ===== Hero Image Stack ===== */
.hero-image-stack {
  position: relative;
}

.hero-illustration {
  width: 110%;
  max-width: none;
  margin-left: -5%;
  margin-top: -40px;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 8px 24px rgba(0,0,0,0.08));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-app-screenshot {
  position: relative;
  z-index: 2;
  margin-top: -60px;
}

/* ===== App Preview (Hero) ===== */
.app-preview {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
}

.app-preview-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.app-preview-dots {
  display: flex;
  gap: 6px;
}

.app-preview-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.app-preview-dots span:nth-child(1) { background: #ff5f57; }
.app-preview-dots span:nth-child(2) { background: #febc2e; }
.app-preview-dots span:nth-child(3) { background: #28c840; }

.app-preview-url {
  font-size: 12px;
  color: var(--gray-500);
  background: var(--white);
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid var(--gray-200);
  flex: 1;
  text-align: center;
}

.app-preview-body {
  padding: 20px;
  background: var(--gray-50);
}

.hero-screenshot-img {
  width: 100%;
  border-radius: var(--radius-sm);
}

/* Demo App inside preview */
.app-demo {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 16px;
  min-height: 280px;
}

.demo-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.demo-sidebar-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.demo-sidebar-item.active {
  border-color: var(--blue);
  background: var(--blue-light);
}

.demo-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--blue-light);
  flex-shrink: 0;
}

.demo-sidebar-item.active .demo-icon {
  background: var(--blue);
}

.demo-text-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  padding-top: 4px;
}

.demo-text-line {
  height: 8px;
  border-radius: 4px;
  background: var(--gray-300);
}

.demo-text-line.light { background: var(--gray-200); }
.w-40 { width: 40%; }
.w-50 { width: 50%; }
.w-60 { width: 60%; }
.w-70 { width: 70%; }
.w-80 { width: 80%; }
.w-90 { width: 90%; }
.w-100 { width: 100%; }

.demo-main {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.demo-main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.demo-badge-row { display: flex; gap: 6px; }

.demo-badge {
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 10px;
  font-weight: 600;
}

.demo-badge.green { background: var(--green-light); color: var(--green); }
.demo-badge.blue { background: var(--blue-light); color: var(--blue); }

.demo-card {
  padding: 14px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.demo-card.accent {
  border-color: var(--blue);
  border-left: 3px solid var(--blue);
}

.demo-progress-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.demo-progress-bar {
  height: 6px;
  background: var(--gray-200);
  border-radius: 3px;
  overflow: hidden;
}

.demo-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--green));
  border-radius: 3px;
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 17px;
  color: var(--gray-700);
  line-height: 1.7;
}

/* ===== Problem Cards ===== */
.section-problem {
  background: var(--gray-50);
}

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

.problem-card {
  background: var(--white);
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
}

.problem-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
}

.problem-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--blue-light);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.problem-image {
  width: 100%;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--blue-50), #f5f0ff);
}

.problem-image img {
  max-width: 70%;
  max-height: 120px;
  object-fit: contain;
  transition: transform var(--transition);
  mix-blend-mode: multiply;
}

.problem-card:hover .problem-image img {
  transform: scale(1.05);
}

.problem-card h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}

.problem-card p {
  color: var(--gray-700);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== Feature Cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  position: relative;
  background: var(--white);
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}

.feature-number {
  font-family: 'Poppins', sans-serif;
  font-size: 48px;
  font-weight: 800;
  color: var(--blue-light);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -2px;
}

.feature-card:hover .feature-number {
  color: var(--blue);
  opacity: 0.2;
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--blue);
}

.feature-icon-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.feature-card h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--gray-700);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== Steps ===== */
.section-steps {
  background: var(--gray-50);
}

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

.step-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  transition: all var(--transition);
}

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

.step-visual {
  padding: 28px 20px;
  background: var(--blue-50);
  border-bottom: 1px solid var(--gray-200);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.step-screenshot {
  max-width: 95%;
  max-height: 300px;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.08));
  transition: transform var(--transition);
}

.step-card:hover .step-screenshot {
  transform: scale(1.03);
}

.step-content {
  padding: 28px 28px 32px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 14px;
}

.step-content h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-content p {
  color: var(--gray-700);
  font-size: 15px;
  line-height: 1.7;
}

/* Step mocks */
.step-mock {
  width: 100%;
}

.mock-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--gray-700);
}

.mock-item.fade { opacity: 0.5; }

.mock-upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px;
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--gray-500);
  font-size: 13px;
  margin-bottom: 12px;
}

.mock-file-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.file-chip {
  padding: 4px 10px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 100px;
  font-size: 11px;
  color: var(--gray-700);
}

.mock-answer-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
}

.mock-answer-row + .mock-answer-row {
  border-top: 1px solid var(--gray-200);
}

.mock-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
}

.mock-check.done { background: var(--green); }
.mock-check.pending {
  background: transparent;
  border: 2px solid var(--orange);
  animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.3); }
  50% { box-shadow: 0 0 0 6px rgba(245, 158, 11, 0); }
}

.mock-answer-text {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

/* ===== Preview Section ===== */
.section-preview {
  background: var(--white);
}

.preview-wrapper {
  max-width: 960px;
  margin: 0 auto;
}

.preview-frame {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.08);
}

.preview-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
}

.preview-open-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--blue-light);
  background: var(--white);
  transition: all var(--transition);
}

.preview-open-btn:hover {
  background: var(--blue-light);
}

/* ===== Mock App ===== */
.mock-app {
  background: var(--gray-50);
  min-height: 540px;
  display: flex;
  flex-direction: column;
  font-family: 'Urbanist', sans-serif;
}

.mock-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
}

.mock-header-demo {
  font-size: 11px;
  font-weight: 700;
  background: var(--blue-light);
  color: var(--blue);
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mock-profile-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mock-body {
  display: grid;
  grid-template-columns: 220px 1fr;
  flex: 1;
  min-height: 0;
}

.mock-sidebar {
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
}

.mock-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.mock-step:hover { background: var(--gray-50); }

.mock-step.active {
  background: var(--blue);
}

.mock-step.active .mock-step-label,
.mock-step.active .mock-step-name {
  color: var(--white);
}

.mock-step-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mock-step.active .mock-step-icon {
  background: rgba(255,255,255,0.2);
}

.mock-step-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.mock-step-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--dark);
}

.mock-sidebar-panel {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mock-panel-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-400);
  padding: 0 8px 6px;
}

.mock-panel-item {
  font-size: 13px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--gray-700);
  transition: all var(--transition);
}

.mock-panel-item:hover { background: var(--gray-50); }

.mock-panel-item.selected {
  background: var(--blue);
  color: var(--white);
  font-weight: 600;
}

/* Mock Content */
.mock-content {
  padding: 24px;
  overflow-y: auto;
  max-height: 490px;
}

.mock-content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 12px;
}

.mock-report-title {
  font-family: 'Urbanist', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: var(--dark);
}

.mock-grade-bar {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mock-grade-total {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--dark);
}

.mock-grade-dot {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: rgba(0,0,0,0.5);
}

.mock-kb-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  padding: 6px 12px;
  background: var(--blue-light);
  border-radius: 100px;
  margin-bottom: 20px;
}

/* Task Cards */
.mock-tasks {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-task {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  cursor: pointer;
  transition: all var(--transition);
}

.mock-task:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.mock-task.active {
  border-color: var(--blue);
  box-shadow: var(--shadow-md);
}

.mock-task-grade {
  width: 6px;
  min-height: 40px;
  border-radius: 3px;
  flex-shrink: 0;
  align-self: stretch;
}

.mock-task-body { flex: 1; min-width: 0; }

.mock-task-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}

.mock-task-summary {
  font-size: 12px;
  color: var(--gray-500);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.mock-task-info {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.mock-task:hover .mock-task-info { background: var(--blue); }
.mock-task:hover .mock-task-info svg { stroke: var(--white); }

/* Expanded Task Detail */
.mock-task-expanded {
  padding: 20px 20px 20px 34px;
  background: var(--white);
  border: 1px solid var(--blue);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  margin-top: -9px;
  animation: expandIn 0.3s ease;
}

@keyframes expandIn {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 500px; }
}

.mock-detail-section {
  margin-bottom: 16px;
}

.mock-detail-section:last-child { margin-bottom: 0; }

.mock-detail-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-400);
  margin-bottom: 6px;
}

.mock-detail-section p {
  font-size: 13px;
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: 8px;
}

.mock-detail-source {
  font-size: 12px;
  color: var(--blue);
  padding: 4px 0;
}

.mock-detail-section ul {
  list-style: none;
  padding: 0;
}

.mock-detail-section li {
  font-size: 12px;
  color: var(--gray-700);
  padding: 3px 0;
  padding-left: 16px;
  position: relative;
}

.mock-detail-section li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

/* Mock responsive */
@media (max-width: 700px) {
  .mock-body {
    grid-template-columns: 1fr;
  }
  .mock-sidebar {
    flex-direction: row;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--gray-200);
    padding: 8px;
    gap: 4px;
  }
  .mock-step { min-width: max-content; padding: 6px 10px; }
  .mock-step-text { display: none; }
  .mock-sidebar-panel { display: none !important; }
  .mock-content { max-height: 400px; padding: 16px; }
}

/* ===== Partners ===== */
.section-partners {
  padding: 60px 0;
  text-align: center;
}

.partners-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--gray-400);
  margin-bottom: 28px;
}

.partners-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.partner-logo {
  opacity: 0.5;
  transition: opacity var(--transition);
  display: flex;
  align-items: center;
}

.partner-logo:hover { opacity: 0.8; }

.partner-logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  transition: filter var(--transition);
}

.partner-logo:hover img {
  filter: grayscale(0%);
}

/* ===== CTA ===== */
.section-cta {
  padding: 40px 0 100px;
}

.cta-card {
  background: linear-gradient(135deg, var(--blue) 0%, #4f46e5 50%, #6366f1 100%);
  border-radius: var(--radius-xl);
  padding: 80px 60px;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
}

.cta-card::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
}

.cta-card h2 {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-card p {
  font-size: 17px;
  opacity: 0.85;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-card .btn {
  position: relative;
  z-index: 1;
}

/* ===== Footer ===== */
.footer {
  background: var(--gray-50);
  border-top: 1px solid var(--gray-200);
  padding: 60px 0 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand {
  max-width: 280px;
}

.footer-tagline {
  color: var(--gray-500);
  font-size: 14px;
  margin-top: 12px;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col strong {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--gray-500);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--gray-700);
  transition: color var(--transition);
}

.footer-col a:hover { color: var(--blue); }

.footer-bottom {
  border-top: 1px solid var(--gray-200);
  padding: 20px 0;
  font-size: 13px;
  color: var(--gray-400);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-content { text-align: center; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }

  .hero-illustration {
    width: 80%;
    margin-left: 10%;
    margin-top: 0;
  }

  .hero-app-screenshot {
    margin-top: -30px;
  }

  .problem-grid,
  .features-grid,
  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .preview-app {
    grid-template-columns: 1fr;
  }

  .preview-left {
    border-right: none;
    border-bottom: 1px solid var(--gray-200);
  }

  .app-demo {
    grid-template-columns: 1fr;
  }

  .demo-sidebar {
    flex-direction: row;
    overflow-x: auto;
  }

  .demo-sidebar-item { min-width: 160px; }

  .footer-inner {
    flex-direction: column;
  }

  .footer-links {
    gap: 40px;
    flex-wrap: wrap;
  }

  .cta-card {
    padding: 48px 32px;
  }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }

  .hero { padding: 120px 0 60px; }

  .section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }

  .hero-title { letter-spacing: -0.5px; }

  .partners-row { gap: 32px; }
}

/* ===== Legal / content pages (cookie policy, support) ===== */
.legal {
  padding: 140px 0 80px;
}
.legal .container {
  max-width: 820px;
}
.legal h1 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: clamp(32px, 4vw, 44px);
  letter-spacing: -1px;
  color: var(--dark);
  margin-bottom: 8px;
}
.legal .legal-updated {
  color: var(--gray-500);
  font-size: 14px;
  margin-bottom: 40px;
}
.legal h2 {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 22px;
  color: var(--dark);
  margin: 40px 0 12px;
}
.legal h3 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 17px;
  color: var(--dark);
  margin: 24px 0 8px;
}
.legal p,
.legal li {
  color: var(--gray-700);
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 14px;
}
.legal ul {
  padding-left: 22px;
  margin-bottom: 14px;
}
.legal a {
  color: var(--blue);
  text-decoration: none;
}
.legal a:hover {
  text-decoration: underline;
}
.legal .legal-card {
  background: var(--blue-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin: 24px 0;
}
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}
.legal th,
.legal td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--gray-200);
  font-size: 15px;
  color: var(--gray-700);
}
.legal th {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  color: var(--dark);
}
/* Support page contact cards */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 32px 0;
}
.support-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.support-card h3 {
  margin-top: 0;
}