:root {
  /* Default to Day */
  --bg-gradient-start: #e0f2fe;
  --bg-gradient-end: #f0f9ff;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --accent: #0ea5e9;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --input-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="sunrise"] {
  --bg-gradient-start: #ffedd5;
  --bg-gradient-end: #fdf4ff;
  --text-primary: #431407;
  --text-secondary: #7c2d12;
  --accent: #f97316;
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.4);
  --input-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="sunset"] {
  --bg-gradient-start: #2e1065;
  --bg-gradient-end: #9f1239;
  --text-primary: #fdf4ff;
  --text-secondary: #fbcfe8;
  --accent: #f43f5e;
  --glass-bg: rgba(0, 0, 0, 0.4);
  --glass-border: rgba(255, 255, 255, 0.1);
  --input-bg: rgba(255, 255, 255, 0.1);
}

[data-theme="night"] {
  --bg-gradient-start: #020617;
  --bg-gradient-end: #0f172a;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --accent: #3b82f6;
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-border: rgba(255, 255, 255, 0.05);
  --input-bg: rgba(15, 23, 42, 0.8);
}

body {
  background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  transition: background 1.5s ease, color 0.5s ease;
  min-height: 100vh;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
  transition: background 0.5s ease, border-color 0.5s ease;
}

h1, h2, h3, p {
  color: var(--text-primary);
  transition: color 0.5s ease;
}

.text-secondary {
  color: var(--text-secondary);
}

.accent-bg {
  background-color: var(--accent);
}

.accent-text {
  color: var(--accent);
}

input[type=range] {
  accent-color: var(--accent);
}

input[type=text], input[type=email], input[type=number], select {
  background-color: var(--input-bg);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

/* Make sure text within inputs stays visible on dark modes */
[data-theme="sunset"] input::placeholder, [data-theme="night"] input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

.delay-1 { animation-delay: 0.2s; opacity: 0; }
.delay-2 { animation-delay: 0.4s; opacity: 0; }
.delay-3 { animation-delay: 0.6s; opacity: 0; }

#countdown-timer .time-box {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

/* Loader */
.loader {
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top: 3px solid var(--text-primary);
  width: 24px;
  height: 24px;
  -webkit-animation: spin 1s linear infinite; /* Safari */
  animation: spin 1s linear infinite;
  display: inline-block;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}