/* ==========================================================================
   ToolVexa - Design System & Global Styles
   ========================================================================== */

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

:root {
  /* Color Palette */
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  --secondary: #06B6D4;
  --accent: #10B981;
  --accent-hover: #059669;

  /* Neutral Shades */
  --slate-50: #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-300: #CBD5E1;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1E293B;
  --slate-900: #0F172A;

  /* Dark Theme Surfaces */
  --bg-main: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F1F5F9;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --border-color: #E2E8F0;

  /* Focus & Shadow */
  --focus-ring: 0 0 0 3px rgba(79, 70, 229, 0.35);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Overrides (Optional Toggle Capability) */
body.dark-mode {
  --bg-main: #0F172A;
  --bg-card: #1E293B;
  --bg-card-hover: #334155;
  --text-main: #F8FAFC;
  --text-muted: #94A3B8;
  --border-color: #334155;
  --primary-light: #1E1B4B;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

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

a:hover {
  color: var(--primary-hover);
}

img, canvas, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.lead {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.35);
}

.btn-secondary {
  background-color: var(--slate-800);
  color: #FFFFFF;
}

.btn-secondary:hover {
  background-color: var(--slate-900);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-main);
}

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

.btn-success {
  background-color: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.btn-success:hover {
  background-color: var(--accent-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-danger {
  background-color: #EF4444;
  color: #FFFFFF;
}

.btn-danger:hover {
  background-color: #DC2626;
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.95rem 2rem;
  font-size: 1.1rem;
}

.btn-full {
  width: 100%;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Header & Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

body.dark-mode .header {
  background-color: rgba(15, 23, 42, 0.88);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--slate-900);
  letter-spacing: -0.03em;
}

body.dark-mode .logo {
  color: #FFFFFF;
}

.logo-icon {
  width: 2.3rem;
  height: 2.3rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

.logo-tag {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  margin-left: 0.25rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--slate-600);
  padding: 0.5rem 0;
  position: relative;
}

body.dark-mode .nav-link {
  color: var(--slate-300);
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text-main);
}

.hamburger svg {
  width: 26px;
  height: 26px;
}

/* Cards */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

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

/* Hero Section */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.12) 0%, rgba(6, 182, 212, 0) 70%);
  z-index: -1;
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.hero-title {
  max-width: 800px;
  margin: 0 auto 1.25rem;
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
}

.hero-subtitle {
  max-width: 640px;
  margin: 0 auto 2.25rem;
  font-size: 1.25rem;
  color: var(--text-muted);
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Section Common */
.section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 3rem;
}

.section-title {
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.feature-icon {
  width: 3.2rem;
  height: 3.2rem;
  border-radius: var(--radius-md);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

/* Tool Cards Grid */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.tool-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.tool-card-body {
  margin-bottom: 1.5rem;
}

.tool-card-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.tool-card-icon svg {
  width: 2rem;
  height: 2rem;
}

.tool-card-title {
  margin-bottom: 0.5rem;
}

.tool-card-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.tool-card-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
  background: #ECFDF5;
  color: #059669;
}

/* Process Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.step-card {
  position: relative;
  text-align: center;
  padding: 2rem 1.25rem;
}

.step-number {
  width: 2.75rem;
  height: 2.75rem;
  background: var(--primary);
  color: #FFFFFF;
  font-weight: 800;
  font-size: 1.2rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.3);
}

/* FAQ Accordion */
.faq-grid {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}

.faq-question svg {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.25rem;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
}

/* Footer */
.footer {
  background-color: var(--slate-900);
  color: var(--slate-300);
  padding: 4rem 0 2rem;
  margin-top: auto;
  border-top: 1px solid var(--slate-800);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--slate-400);
  margin: 1rem 0 1.5rem;
  font-size: 0.95rem;
  max-width: 320px;
}

.footer-logo {
  color: #FFFFFF;
}

.footer-title {
  color: #FFFFFF;
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--slate-400);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--slate-800);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--slate-400);
}

.disclaimer-banner {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--slate-800);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--slate-400);
  text-align: center;
}

/* Toast Notification */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 380px;
  background-color: var(--slate-900);
  color: #FFFFFF;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.9rem;
  animation: slideUp 0.3s ease forwards;
  border-left: 4px solid var(--primary);
}

.toast.success { border-left-color: var(--accent); }
.toast.error { border-left-color: #EF4444; }
.toast.info { border-left-color: var(--secondary); }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}

.input-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.input-prefix-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix {
  position: absolute;
  left: 1rem;
  color: var(--text-muted);
  font-weight: 600;
  pointer-events: none;
}

.input-prefix-group .form-control {
  padding-left: 2.2rem;
}