/* ============================================================
   CREASTACK.CSS — Base responsive mobile-first
   Projet : creastack.fr
   Auteur : Pierre Mick
   ============================================================ */

/* ============================================================
   RESET MODERNE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: 'Outfit', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.6;
  color: #222;
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   VARIABLES
   ============================================================ */
:root {
  --color-primary: #4b7bec;
  --color-primary-dark: #3867d6;
  --color-accent: #ff9f1c;
  --color-bg: #f9f9fb;
  --color-text: #222;
  --color-muted: #888;
  --color-border: #e0e0e0;

  --container-max: 1200px;
  --radius: 0.75rem;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
}

/* ============================================================
   TYPOGRAPHIE
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 0.5em;
  color: #111;
}

h1 { font-size: 3rem; }
p {
  margin-bottom: 1.2em;
  color: #444;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--color-primary-dark);
}

/* ============================================================
   LAYOUT GLOBAL
   ============================================================ */

section {
  padding: 4rem 1.5rem;
  background-color: var(--color-bg);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* ============================================================
   BOUTONS
   ============================================================ */
.btn {
  display: inline-block;
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
  text-align: center;
}
.btn:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
}
.btn:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn-outline:hover {
  background-color: var(--color-primary);
  color: #fff;
}

/* ============================================================
   FORMULAIRES — Minimal, responsive, Webflow-like
   ============================================================ */
form {
  display: grid;
  gap: 1.5rem;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

label {
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.3rem;
  display: block;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"],
input[type="number"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--color-text);
  background-color: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(75, 123, 236, 0.2);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

button[type="submit"],
input[type="submit"] {
  justify-self: start;
}

/* Form-floating */
.form-floating {
  position: relative;
}

.form-floating input,
.form-floating textarea,
.form-floating select {
  padding: 1.25rem 1rem 0.5rem 1rem;
}

.form-floating label {
  position: absolute;
  top: 0.9rem;
  left: 1rem;
  font-size: 1rem;
  color: var(--color-muted);
  pointer-events: none;
  transition: all 0.2s ease;
}

.form-floating input:focus + label,
.form-floating input:not(:placeholder-shown) + label,
.form-floating textarea:focus + label,
.form-floating textarea:not(:placeholder-shown) + label,
.form-floating select:focus + label,
.form-floating select:not([value=""]) + label {
  top: 0.3rem;
  left: 0.9rem;
  font-size: 0.75rem;
  color: var(--color-primary);
  background-color: #fff;
  padding: 0 0.25rem;
}

input[type="checkbox"],
input[type="radio"] {
  accent-color: var(--color-primary);
  margin-right: 0.5rem;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-message {
  font-size: 0.875rem;
  margin-top: 0.25rem;
}
.form-message.error { color: #d63031; }
.form-message.success { color: #00b894; }

@media (min-width: 768px) {
  form.two-columns {
    grid-template-columns: 1fr 1fr;
    gap: 2rem 1.5rem;
  }
  form.two-columns .full-width {
    grid-column: 1 / -1;
  }
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  text-align: center;
  padding: 6rem 1.5rem;
  background: linear-gradient(135deg, #4b7bec, #3867d6);
  color: #fff;
}
.hero h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.hero p {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.9);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background-color: #fff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}
nav .logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}
nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}
nav ul li a {
  font-weight: 500;
  color: var(--color-text);
}
nav ul li a:hover {
  color: var(--color-primary);
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  padding: 2rem 1.5rem;
  background-color: #111;
  color: #fff;
  text-align: center;
  font-size: 0.875rem;
}

/* ============================================================
   INTERACTIONS JS (dropdowns, modals, offcanvas)
   ============================================================ */
body.no-scroll { overflow: hidden; }

.dropdown { position: relative; display: inline-block; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%; left: 0;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  min-width: 180px;
  z-index: 20;
}
.dropdown.open .dropdown-menu { display: block; }

.modal {
  position: fixed;
  inset: 0;
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.modal.show { display: flex; }
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
}
.modal-content {
  position: relative;
  background: #fff;
  border-radius: var(--radius);
  padding: 2rem;
  z-index: 2;
  box-shadow: var(--shadow-md);
}

.offcanvas {
  position: fixed;
  top: 0; left: -100%;
  width: 80%;
  max-width: 300px;
  height: 100%;
  background: #fff;
  box-shadow: var(--shadow-md);
  transition: left 0.3s ease;
  z-index: 999;
}
.offcanvas.open { left: 0; }

/* ============================================================
   UTILITAIRES + ANIMATIONS
   ============================================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }
.hidden { display: none; }

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.6s ease forwards;
}
@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   MEDIA QUERIES
   ============================================================ */
@media (min-width: 600px) {
  .hero h1 { font-size: 2.5rem; }
}
@media (min-width: 900px) {
  .hero h1 { font-size: 3rem; }
}
@media (min-width: 768px) {
  section { padding: 6rem 2rem; }
}
@media (min-width: 1024px) {
  .container { padding: 0 2rem; }
}

/* ============================================================
   DARK MODE — Automatique + Manuel
   ============================================================ */
:root {
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --color-bg: #0f0f10;
    --color-text: #e6e6e6;
    --color-muted: #aaa;
    --color-border: #2a2a2a;
    --color-primary: #6ea8ff;
    --color-primary-dark: #3c79e8;
    --color-accent: #ffb347;
  }
  body {
    background-color: var(--color-bg);
    color: var(--color-text);
  }
  h1,h2,h3,h4,h5,h6 { color: #fff; }
  a { color: var(--color-primary); }
  a:hover { color: var(--color-primary-dark); }
  section { background-color: #151517; }
  input,textarea,select {
    background-color: #1b1b1d;
    border: 1px solid var(--color-border);
    color: var(--color-text);
  }
  input:focus,textarea:focus,select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(110,168,255,0.25);
  }
  .form-floating label { background-color: #1b1b1d; }
  .btn { background-color: var(--color-primary); color: #fff; }
  .btn:hover { background-color: var(--color-primary-dark); }
  .btn-outline {
    border-color: var(--color-primary);
    color: var(--color-primary);
  }
  .btn-outline:hover {
    background-color: var(--color-primary);
    color: #fff;
  }
  nav {
    background-color: #111;
    border-bottom: 1px solid var(--color-border);
  }
  nav ul li a { color: var(--color-text); }
  nav ul li a:hover { color: var(--color-primary); }
  footer {
    background-color: #0b0b0c;
    color: #ddd;
  }
  .dropdown-menu,
  .modal-content,
  .offcanvas {
    background-color: #1b1b1d;
    color: var(--color-text);
    border-color: var(--color-border);
  }
  .modal-overlay { background: rgba(0,0,0,0.75); }
  .hero { background: linear-gradient(135deg, #3c79e8, #1f53b5); }
}

/* Modes manuels */
.theme-light { color-scheme: light; }
.theme-dark {
  color-scheme: dark;
  --color-bg: #0f0f10;
  --color-text: #e6e6e6;
  --color-muted: #aaa;
  --color-border: #2a2a2a;
  --color-primary: #6ea8ff;
  --color-primary-dark: #3c79e8;
  --color-accent: #ffb347;
}
.theme-dark body,
.theme-dark section {
  background-color: var(--color-bg);
  color: var(--color-text);
}
.theme-dark nav {
  background-color: #111;
  border-bottom: 1px solid var(--color-border);
}
.theme-dark footer {
  background-color: #0b0b0c;
  color: #ddd;
}
.theme-dark input,
.theme-dark textarea,
.theme-dark select {
  background-color: #1b1b1d;
  color: var(--color-text);
  border-color: var(--color-border);
}
.theme-dark a:hover { color: var(--color-primary-dark); }