/* ---------------- Root Variables ---------------- */
:root {
  --bg: #f6f7fb;
  --card: #fff;
  --accent: #0078ff;
  --muted: #666;
  --navbar-bg: #fff;
  --navbar-border: #eee;
  --transition-speed: 0.25s;
}

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

body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: #222;
  line-height: 1.6;
  letter-spacing: 0.5px;
  margin: 0;
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

/* ---------------- Navbar ---------------- */
#main-navbar {
  background: var(--navbar-bg) !important;
  border-bottom: 1px solid var(--navbar-border);
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  transition: all var(--transition-speed) ease;
}

#main-navbar .navbar-brand {
  font-weight: 600;
  color: #222;
}

#main-navbar .nav-link {
  color: #333;
  font-weight: 500;
  transition: color var(--transition-speed) ease;
}

#main-navbar .nav-link.active {
  color: var(--accent);
  font-weight: 600;
}

#main-navbar .nav-link:hover {
  color: #4dabf7;
}

.theme-btn {
  background-color: #eee;
  border: none;
  border-radius: 6px;
  padding: 0.35rem 0.8rem;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
}

.theme-btn:hover {
  background-color: #ddd;
}

/* ---------------- Container & Cards ---------------- */
.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.1);
  margin-bottom: 2rem;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

h1, h2, h3 {
  font-weight: 600;
  margin-bottom: 0.75rem;
}

p, li {
  font-weight: 400;
}

.lead {
  color: var(--muted);
}

/* ---------------- Forms ---------------- */
.form-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 12px;
}

input[type="text"], 
input[type="file"] {
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  border: 1px solid #ddd;
  transition: all var(--transition-speed) ease;
}

input[type="text"]:hover,
input[type="file"]:hover {
  border-color: var(--accent);
}

input[type="text"]:focus,
input[type="file"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 8px rgba(77,171,247,0.4);
  outline: none;
}

/* ---------------- Buttons ---------------- */
.btn, .btn-primary {
  border-radius: 10px;
  padding: 0.6rem 1.2rem;
  transition: all var(--transition-speed) ease;
}

.btn:hover, .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.25);
}

.btn:active, .btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}

.btn:focus, .btn-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(77,171,247,0.4);
}

.btn-outline-primary {
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline-primary:hover {
  background-color: rgba(77,171,247,0.1);
}

/* ---------------- Preview & Video ---------------- */
.preview-area {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 12px;
}

.preview-area img, video {
  border-radius: 12px;
  max-width: 360px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.preview-area img:hover, video:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 18px rgba(0,0,0,0.35);
}

/* ---------------- Lists ---------------- */
.list {
  margin-top: 12px;
  max-height: 220px;
  overflow: auto;
  border-radius: 8px;
  padding: 8px;
  background: #fafafa;
  border: 1px solid #eee;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.list .item {
  padding: 10px;
  border-bottom: 1px solid #ddd;
  transition: background 0.2s ease;
}

.list .item:hover {
  background-color: rgba(0,0,0,0.03);
}

/* ---------------- Modal ---------------- */
.modal-inner {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  transition: all var(--transition-speed) ease;
  max-width: 400px;
  text-align: center;
}

/* ---------------- Home quick list ---------------- */
.quick-list {
  list-style: disc;
  margin-left: 20px;
}

/* ---------------- Home Actions ---------------- */
.home-actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
  justify-content: center;
}

/* ---------------- Dark Mode ---------------- */
body.dark-mode {
  background: #121212;
  color: #e0e0e0;
}

/* Navbar Dark Mode */
body.dark-mode #main-navbar {
  background: #1e1e1e !important;
  border-bottom: 1px solid #333;
  box-shadow: 0 2px 6px rgba(0,0,0,0.5);
}

body.dark-mode #main-navbar .navbar-brand {
  color: #ffffff; /* Bright brand text */
  font-weight: 700;
}

body.dark-mode #main-navbar .nav-link {
  color: #ccc;
  font-weight: 500;
}

body.dark-mode #main-navbar .nav-link.active {
  color: #4dabf7;
  font-weight: 600;
}

body.dark-mode #main-navbar .nav-link:hover {
  color: #82c7ff;
}

body.dark-mode .navbar-toggler-icon {
  filter: invert(100%); /* Makes the icon visible in dark mode */
}

/* Theme toggle button */
body.dark-mode .theme-btn {
  background-color: #2a2a2a;
  color: #f0f0f0;
  border: 1px solid #555;
}

body.dark-mode .theme-btn:hover {
  background-color: #333;
}

/* Cards */
body.dark-mode .card {
  background: #1e1e1e;
  color: #e0e0e0;
  border: 1px solid #333;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}

/* Inputs */
body.dark-mode input[type="text"],
body.dark-mode input[type="file"] {
  background: #2a2a2a;
  color: #eee;
  border-color: #444;
}

/* Lists */
body.dark-mode .list {
  background: #1a1a1a;
  border-color: #333;
  color: #ddd;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.3);
}

/* Solid primary button in dark mode */
body.dark-mode .btn-primary {
  background-color: #4dabf7 !important;  /* bright blue */
  color: #fff !important;
  border: none;
}

body.dark-mode .btn-primary:hover {
  background-color: #66b2ff !important;
  color: #fff !important;
}

/* Outline primary button in dark mode */
body.dark-mode .btn-outline-primary {
  background: transparent;
  color: #4dabf7 !important;
  border: 2px solid #4dabf7;
}

body.dark-mode .btn-outline-primary:hover {
  background: #4dabf7;
  color: #fff !important;
}


/* Preview & Video */
body.dark-mode .preview-area img, body.dark-mode video {
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.35);
}

/* Modal */
body.dark-mode .modal-inner {
  background: #1f1f1f;
  color: #eee;
  box-shadow: 0 6px 20px rgba(0,0,0,0.6);
}

/* Smooth transitions */
body.dark-mode *,
body.dark-mode .card,
body.dark-mode input,
body.dark-mode .btn,
body.dark-mode .list,
body.dark-mode .modal-inner,
body.dark-mode video,
body.dark-mode img {
  transition: all 0.3s ease-in-out;
}

/* Fix Start Attendance Button Hover (Light Mode) */
.btn.outline,
.btn-outline-primary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  transition: all var(--transition-speed) ease;
}

.btn.outline:hover,
.btn-outline-primary:hover {
  background-color: var(--accent);
  color: #fff; /* Make text readable on hover */
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(0, 120, 255, 0.3);
}

/* Input text and placeholder fix for dark mode */
body.dark-mode input[type="text"],
body.dark-mode input[type="file"],
body.dark-mode textarea {
  background: #2a2a2a;
  color: #f0f0f0;
  border-color: #444;
}

/* Make placeholder text readable */
body.dark-mode input::placeholder,
body.dark-mode textarea::placeholder {
  color: #bbb; /* light gray for visibility */
  opacity: 1;  /* ensures consistent brightness across browsers */
}

/* Hover & focus styles for better UX */
body.dark-mode input[type="text"]:focus,
body.dark-mode input[type="file"]:focus,
body.dark-mode textarea:focus {
  border-color: #4dabf7;
  box-shadow: 0 0 6px rgba(77, 171, 247, 0.5);
  outline: none;
}