/* ============================================
   OUTILS-INTERACTIFS — Stylesheet principal
   Design moderne SaaS 2025
   ============================================ */

/* --- CSS Variables --- */
:root {
  /* Primary - indigo-violet spectrum */
  --color-primary: #6366F1;
  --color-primary-dark: #4F46E5;
  --color-primary-light: #A5B4FC;
  --color-primary-50: #EEF2FF;

  /* Secondary */
  --color-secondary: #0EA5E9;
  --color-secondary-light: #7DD3FC;

  /* Accent - coral/orange */
  --color-accent: #F97316;
  --color-accent-light: #FED7AA;

  --color-success: #10B981;
  --color-error: #EF4444;
  --color-warning: #F59E0B;

  /* Neutrals - slate undertone */
  --color-text: #0F172A;
  --color-text-light: #64748B;
  --color-text-muted: #94A3B8;
  --color-text-inverse: #FFFFFF;

  --color-bg: #FAFBFF;
  --color-bg-alt: #F1F5F9;
  --color-bg-dark: #020617;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.03);
  --shadow-glow: 0 4px 15px rgba(99, 102, 241, 0.3);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366F1, #8B5CF6);
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E1B4B 50%, #312E81 100%);

  --transition: 250ms ease;
  --max-width: 1200px;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: clamp(0.9375rem, calc(0.875rem + 0.25vw), 1.0625rem);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* --- Fluid Typography --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  line-height: 1.15;
}

h1 {
  font-size: clamp(2rem, calc(1.5rem + 2.5vw), 3.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.5rem, calc(1.2rem + 1.5vw), 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.125rem, calc(1rem + 0.5vw), 1.375rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}

p { margin-bottom: 1rem; }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 768px) {
  .container { padding: 0 2rem; }
}

.section {
  padding: 3rem 0;
}
@media (min-width: 768px) {
  .section { padding: 5rem 0; }
}

.section-alt {
  background: var(--color-bg-alt);
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 251, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-logo:hover { color: var(--color-primary-dark); }

.nav-links {
  display: none;
  list-style: none;
  gap: 1.5rem;
}
.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--color-primary); }

@media (min-width: 768px) {
  .nav-links { display: flex; }
}

.nav-cta { display: none; }
@media (min-width: 768px) {
  .nav-cta { display: block; }
}

/* Mobile menu toggle */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}
@media (min-width: 768px) {
  .nav-toggle { display: none; }
}

/* Mobile menu */
.nav-mobile {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-xl);
  padding: 0.5rem 1rem 1rem;
}
.nav-mobile.is-open { display: block; }
.nav-mobile a {
  display: block;
  padding: 1rem 1.25rem;
  min-height: 48px;
  color: var(--color-text);
  font-weight: 500;
  font-size: 1rem;
  border-radius: var(--radius-sm);
}
.nav-mobile a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 300ms ease;
  text-align: center;
  line-height: 1.4;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #4F46E5, #7C3AED);
  color: var(--color-text-inverse);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.45);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--color-accent);
  color: white;
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}
.btn-accent:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

@media (max-width: 639px) {
  .btn-lg {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
  }
}

/* --- Cards --- */
.card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(226, 232, 240, 0.6);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: transform 300ms ease, box-shadow 300ms ease;
}
.card:hover {
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

/* --- Hero section --- */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  color: var(--color-text-inverse);
}

/* Animated gradient orbs */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  z-index: 0;
  animation: float 8s ease-in-out infinite;
}
.hero::before {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #818CF8, #6366F1);
  top: -200px;
  right: -100px;
}
.hero::after {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #0EA5E9, #06B6D4);
  bottom: -150px;
  left: -100px;
  animation-delay: -4s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -20px) scale(1.05); }
}

.hero .container {
  position: relative;
  z-index: 1;
}

@media (min-width: 768px) {
  .hero { padding: 6rem 0 4rem; }
}

.hero h1 {
  color: #FFFFFF;
  max-width: 800px;
  margin: 0 auto 1.25rem;
}

.hero-subtitle {
  font-size: clamp(1rem, calc(0.9rem + 0.5vw), 1.25rem);
  color: #CBD5E1;
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}
@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }
}

.hero .btn-secondary {
  border-color: rgba(255,255,255,0.3);
  color: white;
}
.hero .btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.5);
  color: white;
}

/* Social proof bar */
.social-proof {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.social-proof-text {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Platform logo bar */
.platform-bar {
  padding: 2rem 0;
  text-align: center;
}
.platform-bar-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.platform-bar-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  opacity: 0.45;
  filter: grayscale(1);
}
.platform-bar-logos span {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
}

/* --- Grid --- */
.grid {
  display: grid;
  gap: 1.5rem;
}
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* --- Badge --- */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-primary {
  background: var(--color-primary-50);
  color: var(--color-primary);
}
.badge-success {
  background: #ECFDF5;
  color: var(--color-success);
}
.badge-accent {
  background: #FFF7ED;
  color: #C2410C;
}

/* --- Pricing cards --- */
.pricing-card {
  text-align: center;
  position: relative;
  overflow: hidden;
}
.pricing-card.popular {
  border: 2px solid var(--color-primary);
  background: linear-gradient(180deg, var(--color-primary-50) 0%, #FFFFFF 40%);
  box-shadow: 0 20px 40px rgba(99, 102, 241, 0.12);
  z-index: 1;
}
@media (min-width: 1024px) {
  .pricing-card.popular {
    transform: scale(1.04);
  }
}
.pricing-popular-badge {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.375rem 1.25rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.pricing-price {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 1rem 0 0.25rem;
}
.pricing-price-suffix {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-light);
}
.pricing-features {
  list-style: none;
  text-align: left;
  margin: 1.5rem 0;
}
.pricing-features li {
  padding: 0.5rem 0;
  padding-left: 1.75rem;
  position: relative;
  color: var(--color-text-light);
}
.pricing-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

/* --- FAQ / Accordion --- */
.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.accordion-item {
  border-bottom: 1px solid var(--color-border);
}
.accordion-item:last-child {
  border-bottom: none;
}
.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
  transition: background var(--transition);
}
.accordion-trigger:hover {
  background: var(--color-bg-alt);
}
.accordion-trigger::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 300;
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 1rem;
}
.accordion-item.is-open .accordion-trigger::after {
  transform: rotate(45deg);
}
.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}
.accordion-content-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- Footer --- */
.footer {
  background: var(--color-bg-dark);
  color: #CBD5E1;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2rem;
}
@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: white;
  margin-bottom: 0.75rem;
}
.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #94A3B8;
}

.footer h4 {
  color: white;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 0.5rem; }
.footer ul a {
  color: #94A3B8;
  font-size: 0.875rem;
  transition: color var(--transition);
}
.footer ul a:hover { color: white; }

.footer-bottom {
  border-top: 1px solid #1E293B;
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.8125rem;
  color: #64748B;
}

/* --- Cookie banner --- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-dark);
  color: #CBD5E1;
  padding: 1rem;
  z-index: 1000;
  transform: translateY(100%);
  transition: transform 300ms ease;
  box-shadow: 0 -4px 12px rgba(0,0,0,0.15);
}
.cookie-banner.is-visible { transform: translateY(0); }
.cookie-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}
@media (min-width: 640px) {
  .cookie-banner-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}
.cookie-banner p { font-size: 0.875rem; margin: 0; }
.cookie-banner a { color: var(--color-primary-light); }
.cookie-banner-actions { display: flex; gap: 0.5rem; flex-shrink: 0; }

/* --- Scroll animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Utility classes --- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-light { color: var(--color-text-light); }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mx-auto { margin-left: auto; margin-right: auto; }
.hidden { display: none !important; }

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--color-text-light); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb-sep::before { content: "›"; }

/* --- Iframe preview --- */
.tool-preview {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: white;
  box-shadow: var(--shadow-lg);
}
.tool-preview iframe {
  width: 100%;
  min-height: 400px;
  border: none;
  display: block;
}

/* --- Icon placeholders --- */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}