/* ntnu.cc 共用主題
   抽自 functions/lib/templates.js 的 :root 變數與基礎元件樣式。
   templates.js 仍維持自帶 inline CSS（後端動態組合需要），請保持兩處同步。 */

:root {
  --primary: #9B2335;
  --primary-dark: #7A1C2A;
  --primary-light: #C94C5C;
  --bg-gradient: linear-gradient(135deg, #9B2335 0%, #B83A4B 50%, #C94C5C 100%);
  --bg-white: #ffffff;
  --bg-light: #fff9f9;
  --text-primary: #2d2d2d;
  --text-secondary: #555555;
  --text-muted: #777777;
  --accent: #9B2335;
  --accent-hover: #C94C5C;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --border: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(155, 35, 53, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(155, 35, 53, 0.12);
  --shadow-lg: 0 10px 15px -3px rgba(155, 35, 53, 0.12);
  --shadow-xl: 0 20px 25px -5px rgba(155, 35, 53, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans TC', sans-serif;
  background: var(--bg-light);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-lg);
}

h1, h2, h3 { color: var(--text-primary); margin-bottom: 1rem; }
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p { color: var(--text-secondary); margin-bottom: 1rem; }

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  background: var(--bg-gradient);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: white;
}
.btn:disabled {
  background: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}
.btn-secondary {
  background: var(--bg-white);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--bg-white);
}
.btn-success { background: var(--success); }
.btn-danger { background: var(--error); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }

input, textarea, select {
  width: 100%;
  padding: 0.65rem 0.875rem;
  background: var(--bg-white);
  border: 2px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}
input:focus, textarea:focus, select:focus { border-color: var(--primary); }

label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
}

.alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.alert-success { background: rgba(16, 185, 129, 0.1); border: 1px solid var(--success); color: #047857; }
.alert-error   { background: rgba(239, 68, 68, 0.1); border: 1px solid var(--error); color: #b91c1c; }
.alert-warning { background: rgba(245, 158, 11, 0.1); border: 1px solid var(--warning); color: #b45309; }

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* Toast / Modal helpers — 配合 ntnu-ui.js */
.ntnu-toast-host {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
  pointer-events: none;
}
.ntnu-toast {
  background: var(--text-primary);
  color: #fff;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity .2s, transform .2s;
  pointer-events: auto;
  max-width: 320px;
}
.ntnu-toast.show { opacity: 1; transform: translateY(0); }
.ntnu-toast.success { background: var(--success); }
.ntnu-toast.error { background: var(--error); }
.ntnu-toast.warning { background: var(--warning); color: #1f2937; }

.ntnu-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 5000;
}
.ntnu-modal-overlay.show { display: flex; }
.ntnu-modal-card {
  background: #fff;
  border-radius: 16px;
  max-width: 520px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}
.ntnu-modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ntnu-modal-header h3 { margin: 0; font-size: 1.1rem; }
.ntnu-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}
.ntnu-modal-close:hover { color: var(--primary); }
.ntnu-modal-body { padding: 1.5rem; }

/* Dropzone */
.ntnu-dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  background: var(--bg-light);
  cursor: pointer;
  transition: all .2s;
}
.ntnu-dropzone.dragover {
  border-color: var(--primary);
  color: var(--primary);
  background: #fff;
}