/* ================= GLOBAL RESET ================= */
* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

/* ================= BODY & THEMES ================= */
body {
  background: #f4f6fb;
  margin: 0;
  padding: 0;
  color: #111;
  transition: background 0.3s ease, color 0.3s ease;
}

body.dark {
  background: #0f172a;
  color: white;
}

/* ================= CONTAINER ================= */
.container {
  max-width: 420px;
  margin: 60px auto;
  background: white;
  padding: 22px 18px;
  border-radius: 14px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.12);
  transition: background 0.3s ease;
}

body.dark .container {
  background: #1e293b;
}

/* ================= HEADER ================= */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

header h1 {
  font-size: 22px;
  margin: 0;
}

/* ================= FORM CONTROLS ================= */
input[type="file"],
input[type="text"],
input[type="range"],
input[type="color"],
button,
select {
  width: 100%;
  margin-top: 10px;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #cbd5e1;
  background: white;
  color: #111;
  font-size: 14px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

body.dark input[type="file"],
body.dark input[type="text"],
body.dark select,
body.dark button,
body.dark input[type="range"],
body.dark input[type="color"] {
  background: #32506c;
  border: 1px solid #475a72;
  color: white;
}

input[type="text"]:focus,
select:focus,
input[type="range"]:focus,
input[type="color"]:focus {
  outline: none;
  border-color: #2563eb;
}

input[type="range"] {
  accent-color: #2563eb;
}

/* ================= BUTTON ================= */
button {
  background: #2563eb;
  color: white;
  border: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
}

button:hover {
  background: #1d4ed8;
}

/* ================= PREVIEW IMAGE ================= */
img {
  display: none;
  width: 100%;
  margin-top: 22px;
  border-radius: 8px;
  border: 1px solid #cbd5e1;
}

body.dark img {
  border: 1px solid #475a72;
}

/* ================= DARK MODE TOGGLE ================= */
.theme-toggle {
  display: flex;
  align-items: center;
  margin-left: auto;
}

#darkToggle {
  display: none;
}

.toggle-label {
  width: 60px;
  height: 32px;
  background: #d1d5db; /* default handle off */
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  transition: background 0.3s ease;
}

.toggle-label:hover {
  filter: brightness(1.1);
}

.toggle-circle {
  width: 26px;
  height: 26px;
  background: white;
  border-radius: 50%;
  position: absolute;
  top: 3px;
  left: 4px;
  transition: transform 0.3s ease;
}

/* Toggle OFF */
#darkToggle:not(:checked) + .toggle-label {
  background: #94a3b8;
}

/* Toggle ON */
#darkToggle:checked + .toggle-label {
  background: #22c55e;
}

#darkToggle:checked + .toggle-label .toggle-circle {
  transform: translateX(28px);
}

/* ================= MISC / UTILITY ================= */
label {
  margin-top: 12px;
  display: block;
  font-size: 14px;
  font-weight: 500;
}

/* Mobile tweaks */
@media (max-width: 480px) {
  .container {
    margin: 40px 10px;
  }
}