/* ===== Variables de thème ===== */
:root {
  color-scheme: light dark; /* scrollbars, champs natifs, etc. au bon thème */

  --bg: #ffffff;
  --bg-soft: #f4f4f5;
  --text: #18181b;
  --text-muted: #555;
  --border: #d4d4d8;
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-text: #ffffff;
  --error-bg: #fdd;
  --error-text: #7f1d1d;
}

/* Thème sombre : suit automatiquement la préférence du système / navigateur */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141417;
    --bg-soft: #1e1e23;
    --text: #e4e4e7;
    --text-muted: #a1a1aa;
    --border: #3f3f46;
    --accent: #a78bfa;
    --accent-hover: #c4b5fd;
    --accent-text: #141417;
    --error-bg: #450a0a;
    --error-text: #fca5a5;
  }
}

/* ===== Base ===== */
* { box-sizing: border-box; }

body {
  font-family: system-ui, sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  transition: background .2s ease, color .2s ease;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== Header ===== */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  max-width: 40rem;
  width: 100%;
  margin: 0 auto;
}

.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
}

/* ===== Conteneur responsive ===== */
.container {
  width: 100%;
  max-width: 34rem;
  margin: 0 auto;
  padding: 1rem;
  flex: 1;
}

h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }

/* ===== Formulaire ===== */
label {
  display: block;
  margin-top: 1rem;
  font-weight: 600;
}

small {
  display: block;
  color: var(--text-muted);
  font-weight: 400;
}

input {
  width: 100%;
  padding: .6rem;
  margin-top: .25rem;
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}
input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ===== Email Input Group ===== */
.email-input-group {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: .25rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color .2s ease;
}

.email-input-group:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.email-input-group input {
  flex: 1;
  border: none;
  background: transparent;
  padding: .6rem;
  margin: 0;
  margin-top: 0;
  outline: none;
}

.email-input-group input:focus {
  outline: none;
}

.email-separator {
  padding: 0 .5rem;
  font-weight: bold;
  color: var(--text-muted);
  background: var(--bg-soft);
  user-select: none;
}

.email-input-group select {
  border: none;
  padding: .6rem;
  background: var(--bg-soft);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  outline: none;
  min-width: 140px;
}

.email-input-group select:focus {
  outline: none;
}

.email-input-group select option {
  background: var(--bg);
  color: var(--text);
}

button[type="submit"] {
  margin-top: 1.5rem;
  width: 100%;
  padding: .7rem 1.2rem;
  background: var(--accent);
  color: var(--accent-text);
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s ease;
}
button[type="submit"]:hover { background: var(--accent-hover); }

/* ===== Divers ===== */
.error {
  background: var(--error-bg);
  color: var(--error-text);
  padding: .7rem;
  border-radius: 4px;
}

.hp {
  position: absolute;
  left: -9999px;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
}

/* ===== Responsive ===== */

/* Petits mobiles*/
@media (max-width: 359px) {
  .container { padding: .75rem; }
  h1 { font-size: 1.35rem; }
  .logo { font-size: 1.2rem; }
  
  .email-input-group select {
    min-width: 100px;
    padding: .5rem;
    font-size: .9rem;
  }
}

/* mobiles (≥ 640px) */
@media (min-width: 640px) {
  button[type="submit"] { width: auto; }
  .container { padding: 2rem 1rem; }
}

/* laptops (≥ 1024px) */
@media (min-width: 1024px) {
  .container { max-width: 44rem; padding: 2.5rem 1rem; }
  .site-header { max-width: 50rem; }
  h1 { font-size: 2.2rem; }
}

/* Grands écrans (≥ 1280px) */
@media (min-width: 1280px) {
  .container { max-width: 48rem; }
  .site-header { max-width: 54rem; }
}