/* Theme variables */
:root{
  --bg: #e9f7ff;
  --card-bg: #ffffff;
  --text: #0b2946;
  --muted: #6b7a86;
  --accent: #00aaff;
  --accent-2: #0077cc;
  --shadow: rgba(10,25,40,0.06);
  --toast-bg: rgba(0,170,255,0.95);
  --theme-color: #00aaff;
  /* Borders for consistent theming */
  --border: rgba(11,41,70,0.06);
  --card-border: rgba(11,41,70,0.06);
  --input-border: rgba(11,41,70,0.06);
}

.dark{
  /* Core colors tuned for higher contrast and readability */
  --bg: #04121a; /* deep navy */
  --card-bg: #061827; /* slightly lighter for card */
  --text: #eaf6ff; /* very light text */
  --muted: #9fb7c9; /* secondary text */
  --accent: #4fc0ff; /* brighter accent for buttons */
  --accent-2: #1e90ff; /* secondary accent */
  --shadow: rgba(0,0,0,0.6);
  --toast-bg: rgba(60,140,220,0.98);
  --theme-color: #2fa0ff;

  /* UI element tweaks for dark mode */
  --input-bg: #07202b;
  --input-border: rgba(255,255,255,0.16);
  --card-shadow: rgba(0,0,0,0.6);
  --progress-bg: rgba(255,255,255,0.03);
  --secondary-border: rgba(255,255,255,0.06);
  /* stronger, consistent borders for dark mode */
  --border: rgba(255,255,255,0.12);
  --card-border: rgba(255,255,255,0.08);
}

*{box-sizing:border-box}

/* Smooth theme transitions */
body, .card, input, button, .progress-bar, .toast {
  transition: background-color .25s ease, color .25s ease, box-shadow .25s ease, border-color .25s ease;
}

/* Dark-mode element tweaks (improved contrast & borders) */
.dark input {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.dark .card {
  box-shadow: 0 12px 30px var(--card-shadow);
  border: 1px solid var(--card-border);
}

.dark .secondary {
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text);
  background: rgba(255,255,255,0.01);
}

.dark .secondary:hover {
  background: rgba(255,255,255,0.03);
}

.dark .preset {
  border: 1px solid rgba(255,255,255,0.04);
}

.dark .header-actions button {
  border: 1px solid transparent;
  padding: 8px;
}

/* Make the Install button clearly visible in dark mode */
.dark .header-actions #installBtn {
  border: 1px solid var(--card-border);
  background: rgba(255,255,255,0.02);
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--text);
}

.dark .header-actions button:hover {
  background: rgba(255,255,255,0.03);
  border-color: rgba(255,255,255,0.04);
}

.dark .header-actions #installBtn:focus {
  outline: 3px solid rgba(47,160,255,0.28);
  outline-offset: 2px;
}

.dark .progress {
  background: var(--progress-bg);
  border: 1px solid rgba(255,255,255,0.02);
}

.dark .progress-bar {
  background: linear-gradient(90deg,var(--accent),var(--accent-2));
  box-shadow: 0 2px 6px rgba(0,0,0,0.25) inset;
}

.dark .toast{
  background: var(--toast-bg);
  border: 1px solid rgba(255,255,255,0.04);
}

.dark button:focus, .dark input:focus {
  outline: 3px solid rgba(47,160,255,0.28);
  outline-offset: 2px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing:antialiased;
}

.app-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  max-width:980px;
  margin: 6px auto 18px;
}

.title{display:flex;align-items:center;gap:10px}
.app-icon{width:40px;height:40px;border-radius:8px}

.header-actions button{background:transparent;border:none;cursor:pointer;font-size:18px;padding:8px;border-radius:8px}
.header-actions button:focus{outline:3px solid rgba(0,170,255,0.12)}

.card{
  max-width:720px;
  margin:0 auto;
  background:var(--card-bg);
  padding:22px;
  border-radius:12px;
  box-shadow: 0 8px 24px var(--shadow);
}

label{display:block;margin-top:8px;color:var(--muted);font-weight:600}
input{width:100%;padding:12px;margin:8px 0;border-radius:10px;border:1px solid rgba(11,41,70,0.06);background:transparent;color:var(--text)}

.controls{display:flex;flex-direction:column;gap:10px;margin-top:12px} 
.primary{flex:1;padding:14px;border-radius:10px;background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;border:none;font-weight:700;cursor:pointer}
.secondary{padding:14px;border-radius:10px;background:transparent;border:2px solid rgba(11,41,70,0.06);cursor:pointer}

.primary:active,.secondary:active{transform:translateY(1px)}

.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:20px;background:var(--toast-bg);color:#fff;padding:12px 18px;border-radius:8px;box-shadow:0 8px 20px rgba(0,0,0,0.15);z-index:1000;transition:opacity .3s}

.progress{width:100%;height:18px;background:rgba(11,41,70,0.04);border-radius:12px;margin:12px 0;overflow:hidden}
.progress-bar{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));width:0%;transition:width .45s ease}

.timer{margin-top:10px;font-weight:700;font-size:16px;color:var(--muted);text-align:center;font-family:monospace}

/* Countdown display */
.countdown{font-size:28px;font-weight:800;text-align:center;margin-top:8px;font-family:monospace;color:var(--text)}
.countdown-container{height:10px;background:var(--progress-bg, rgba(11,41,70,0.04));border-radius:12px;overflow:hidden;margin-top:8px}
.countdown-progress{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width 0.25s linear}



/* Responsive */
@media(min-width:700px){
  .card{display:grid;grid-template-columns:1fr 260px;gap:18px;align-items:start}
  .controls{flex-direction:row}
  .title h1{font-size:20px}
}

/* Mobile-specific tweaks */
@media(max-width:699px){
  body{padding:12px}
  .card{padding:16px}
  .app-header{margin:6px 0 12px}
  .app-icon{width:36px;height:36px}
  .header-actions button{padding:12px;border-radius:8px}
  .controls{gap:8px}
  .primary,.secondary{width:100%;padding:14px;font-size:16px;border-radius:10px}
  .countdown{font-size:32px}
  .countdown-container{height:12px}
  input{padding:14px;font-size:16px;border-radius:10px}
  .modal-content{min-width:auto;width:94%;max-width:94%}
  .timer{font-size:15px}
}

/* Utility */
button:focus{outline:3px solid rgba(0,170,255,0.14);outline-offset:2px}

/* Modals */
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;background:rgba(0,0,0,0.35);opacity:0;pointer-events:none;transition:opacity .18s ease}
.modal.open, .modal[aria-hidden="false"]{opacity:1;pointer-events:auto}
.modal-content{background:var(--card-bg);padding:18px;border-radius:12px;min-width:280px;max-width:720px;border:1px solid var(--card-border);box-shadow:0 10px 30px rgba(0,0,0,0.12)}
.modal h3{margin:0 0 8px}
.modal .presets{display:flex;gap:8px;margin-bottom:10px}
.preset{background:transparent;border:1px solid rgba(11,41,70,0.06);padding:8px 12px;border-radius:8px;cursor:pointer}
.preset:hover{background:rgba(0,170,255,0.06)}
.modal .modal-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}
.modal .reset{background:#ff6b6b;color:#fff;border:none;padding:10px 12px;border-radius:8px;cursor:pointer}

/* Tweak small microinteractions */
.primary, .secondary, .preset{transition:transform .06s ease, box-shadow .12s ease}
.primary:active, .secondary:active, .preset:active{transform:translateY(1px) scale(.997)}

.nowrap{display:inline-flex;gap:8px;align-items:center}