:root {
  --bg: #0f1117;
  --bg-glow: #1d2233;
  --surface: #171a24;
  --surface-2: #1f2330;
  --border: #2a2f3f;
  --text: #e9ecf3;
  --muted: #8e95a8;
  --accent: #f5c542;
  --accent-soft: rgba(245, 197, 66, 0.14);
  --success: #4ccf8a;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f3f4f8;
    --bg-glow: #ffffff;
    --surface: #ffffff;
    --surface-2: #f2f3f7;
    --border: #dfe2ea;
    --text: #1b1e27;
    --muted: #646b7d;
    --accent: #c98a00;
    --accent-soft: rgba(201, 138, 0, 0.12);
    --success: #1f9d5c;
    --shadow: 0 6px 20px rgba(20, 24, 40, 0.08);
    color-scheme: light;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: radial-gradient(1200px 600px at 50% -200px, var(--bg-glow), var(--bg)) fixed;
}

.app {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px 40px;
  display: grid;
  gap: 16px;
}

/* --- Başlık --- */

.app-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 4px 4px 8px;
}

.app-header img {
  filter: drop-shadow(0 4px 12px rgba(245, 197, 66, 0.4));
}

.app-header h1 {
  margin: 0;
  font-size: 1.6rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.app-header p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* --- Kartlar --- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 14px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.card-head h2 {
  margin: 0;
}

/* --- Form öğeleri --- */

input {
  font: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  width: 100%;
  min-width: 0;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

input[type="number"] {
  -moz-appearance: textfield;
  appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.inline-field {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.inline-field input {
  width: 96px;
  padding: 7px 10px;
  text-align: center;
}

/* --- Yıldız ızgarası --- */

.star-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.star {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  cursor: text;
}

.star::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("../imgs/Star.png") center / contain no-repeat;
  transition: transform 0.2s, filter 0.2s;
}

.star:focus-within::before {
  transform: scale(1.06);
  filter: drop-shadow(0 0 10px rgba(245, 197, 66, 0.55));
}

.star.is-done::before {
  filter: saturate(0.4) brightness(0.8);
}

.star input {
  position: relative;
  width: 64%;
  padding: 2px 0;
  margin-top: 8%;
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: #2b1d00;
  background: transparent;
  border: 0;
  border-radius: 6px;
}

.star input::placeholder {
  color: #6b4f00;
}

.star input:focus {
  box-shadow: none;
  background: rgba(255, 255, 255, 0.35);
}

.star-index {
  position: absolute;
  top: -2px;
  left: -2px;
  z-index: 1;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 20px;
  text-align: center;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.star.is-done .star-index {
  color: #fff;
  background: var(--success);
  border-color: transparent;
}

/* --- Ayarlar --- */

.fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: grid;
  gap: 6px;
  align-content: start;
}

.field > span:first-child {
  font-size: 0.85rem;
  color: var(--muted);
}

.field small {
  font-size: 0.75rem;
  color: var(--muted);
  opacity: 0.8;
}

.field-accent input {
  border-color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}

.input-wrap {
  position: relative;
  display: block;
}

.input-wrap input {
  padding-right: 34px;
}

.input-wrap::after {
  content: attr(data-unit);
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

/* --- Sonuçlar --- */

.summary {
  margin: -6px 0 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.summary:empty {
  display: none;
}

.result-grid {
  display: grid;
  gap: 10px;
}

.result {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.result img {
  flex: none;
  object-fit: contain;
}

.result > div {
  display: grid;
  min-width: 0;
}

.result-label {
  font-size: 0.8rem;
  color: var(--muted);
}

.result output {
  font-size: 1.45rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
  cursor: help;
}

.hint {
  margin: 12px 0 0;
  font-size: 0.75rem;
  color: var(--muted);
}

.btn-ghost {
  font: inherit;
  font-size: 0.85rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--text);
  border-color: var(--muted);
  outline: none;
}

/* --- Küçük ekranlar --- */

@media (max-width: 420px) {
  .star-grid {
    gap: 6px;
  }

  .star input {
    font-size: 0.8rem;
  }

  .fields {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}