/* 포모도로 타이머 도구 전용 스타일 (v2 디자인 업그레이드)
   참고: https://pomodorotimer.online/ — 어두운 그라디언트 배경 위에 은은하게 빛나는
   원형 링 타이머를 중심에 두는 구성을 이 사이트의 다른 도구들과는 다른, 이 도구만의
   독립적인 "몰입 앱" 톤으로 가져왔습니다. 집중은 바이올렛, 짧은 휴식은 앰버, 긴 휴식은
   그린으로 링과 배지 색이 바뀌는 기존 신호등 패턴은 그대로 유지합니다. */

:root {
  --pomo-focus: #8b5cf6;
  --pomo-focus-glow: rgba(139, 92, 246, 0.55);
  --pomo-short-break: #f59e0b;
  --pomo-short-break-glow: rgba(245, 158, 11, 0.5);
  --pomo-long-break: #22c55e;
  --pomo-long-break-glow: rgba(34, 197, 94, 0.5);
  --pomo-active: var(--pomo-focus);
  --pomo-active-glow: var(--pomo-focus-glow);
  --pomo-card-bg: rgba(255, 255, 255, 0.04);
  --pomo-card-border: rgba(255, 255, 255, 0.09);
  --pomo-text: #f1f5f9;
  --pomo-text-muted: #97a0b3;
  --pomo-radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  background:
    radial-gradient(circle at 12% 12%, rgba(139, 92, 246, 0.28), transparent 42%),
    radial-gradient(circle at 88% 20%, rgba(56, 189, 248, 0.14), transparent 46%),
    radial-gradient(circle at 60% 100%, rgba(34, 197, 94, 0.14), transparent 50%),
    #0b0a16;
  background-attachment: fixed;
  color: var(--pomo-text);
  line-height: 1.6;
}

.top-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  height: 56px;
  padding: 0 16px;
  background: rgba(11, 10, 22, 0.7);
  backdrop-filter: blur(8px);
}

/* PC처럼 넓은 화면에서는 스크롤을 올렸을 때 상단바 전체가 화면을 가리지 않도록,
   막대(.top-bar) 자체를 폭 전체가 아니라 버튼 크기만큼만 남기고 배경도 지웁니다.
   .back-link 자체가 이미 불투명한 배경(pill 버튼)을 갖고 있어서 겹침 문제 없이
   버튼만 떠 있는 것처럼 보입니다. */
@media (min-width: 768px) {
  .top-bar {
    width: fit-content;
    height: auto;
    padding: 12px 16px 0;
    background: transparent;
  }
}

.back-link {
  display: inline-block;
  padding: 6px 14px;
  background: var(--pomo-card-bg);
  border: 1px solid var(--pomo-card-border);
  border-radius: 999px;
  color: var(--pomo-text-muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.back-link:hover {
  color: var(--pomo-focus);
  border-color: var(--pomo-focus);
}

.page-header {
  text-align: center;
  padding: 10px 16px 16px;
}

.page-header h1 {
  margin: 0 0 8px;
  font-family: "Encode Sans Expanded", -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 800;
  font-size: 2.2rem;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #c4b5fd, #8b5cf6 60%, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0;
  color: var(--pomo-text-muted);
  font-size: 1.05rem;
}

.tagline-extra {
  margin: 6px 0 0;
  color: var(--pomo-text-muted);
  font-size: 0.88rem;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 16px 48px;
}

/* ---- 원형 링 타이머 ---- */

.pomo-display-section {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 20px 28px;
}

.pomo-display-section.is-focus {
  --pomo-active: var(--pomo-focus);
  --pomo-active-glow: var(--pomo-focus-glow);
}

.pomo-display-section.is-short-break {
  --pomo-active: var(--pomo-short-break);
  --pomo-active-glow: var(--pomo-short-break-glow);
}

.pomo-display-section.is-long-break {
  --pomo-active: var(--pomo-long-break);
  --pomo-active-glow: var(--pomo-long-break-glow);
}

.pomo-completed-badge {
  margin: 0 0 16px;
  padding: 6px 16px;
  min-height: 1em;
  border-radius: 999px;
  background: var(--pomo-card-bg);
  border: 1px solid var(--pomo-card-border);
  color: var(--pomo-text-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.pomo-completed-badge:empty {
  visibility: hidden;
}

.pomo-tabs {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  margin-bottom: 28px;
  background: var(--pomo-card-bg);
  border: 1px solid var(--pomo-card-border);
  border-radius: 999px;
}

.pomo-tab {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--pomo-text-muted);
  transition: background 0.2s ease, color 0.2s ease;
}

.pomo-tab.is-active {
  background: var(--pomo-active);
  color: #fff;
  box-shadow: 0 0 16px var(--pomo-active-glow);
}

.pomo-ring-wrap {
  position: relative;
  width: min(78vw, 300px);
  height: min(78vw, 300px);
}

.pomo-ring-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.pomo-ring-track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 10;
}

.pomo-ring-progress {
  fill: none;
  stroke: var(--pomo-active);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 678.58;
  stroke-dashoffset: 0;
  filter: drop-shadow(0 0 10px var(--pomo-active-glow));
  transition: stroke 0.3s ease, filter 0.3s ease;
}

.pomo-ring-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.pomo-time {
  margin: 0;
  font-family: "Encode Sans Expanded", -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 800;
  font-size: 3.4rem;
  letter-spacing: -0.02em;
  color: #fff;
  /* 가변폭 폰트라 숫자마다 너비가 달라 :이 흔들려 보이는 문제 방지: 모든 숫자를 동일한 폭으로 고정 */
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

.pomo-phase-pill {
  margin: 0;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--pomo-card-bg);
  border: 1px solid var(--pomo-card-border);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--pomo-active);
}

.pomo-set-progress {
  margin: 22px 0 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--pomo-text-muted);
  min-height: 1.2em;
}

/* ---- 설정 카드 ---- */

.pomo-setup-section {
  margin-top: 20px;
  background: var(--pomo-card-bg);
  border: 1px solid var(--pomo-card-border);
  border-radius: var(--pomo-radius);
  padding: 20px;
  backdrop-filter: blur(6px);
}

.pomo-field,
.pomo-time-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pomo-field + .pomo-field,
.pomo-field + .pomo-time-field,
.pomo-time-field + .pomo-field,
.pomo-time-field + .pomo-time-field {
  margin-top: 14px;
}

.pomo-field label,
.pomo-time-field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--pomo-text-muted);
}

.pomo-field input {
  padding: 11px 12px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid var(--pomo-card-border);
  border-radius: 8px;
  outline: none;
  color: var(--pomo-text);
  font-family: inherit;
  transition: border-color 0.15s ease;
}

.pomo-field input:focus {
  border-color: var(--pomo-focus);
}

.pomo-field input:disabled {
  background: rgba(255, 255, 255, 0.015);
  color: var(--pomo-text-muted);
}

.pomo-time-inputs {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.pomo-time-inputs input {
  width: 60px;
  padding: 11px 6px;
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 2px solid var(--pomo-card-border);
  border-radius: 8px;
  outline: none;
  color: var(--pomo-text);
  font-family: inherit;
  text-align: center;
  transition: border-color 0.15s ease;
}

.pomo-time-inputs input:focus {
  border-color: var(--pomo-focus);
}

.pomo-time-inputs input:disabled {
  background: rgba(255, 255, 255, 0.015);
  color: var(--pomo-text-muted);
}

.pomo-time-unit {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--pomo-text-muted);
  margin-right: 6px;
}

.pomo-error {
  margin: 12px 0 0;
  padding: 10px 14px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-radius: 8px;
  color: #fca5a5;
  font-size: 0.85rem;
}

.pomo-controls {
  margin-top: 18px;
  display: flex;
  gap: 10px;
}

.pomo-btn {
  flex: 1;
  padding: 14px 0;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid var(--pomo-card-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--pomo-text-muted);
  cursor: pointer;
  transition: background 0.12s ease, transform 0.08s ease, box-shadow 0.2s ease;
}

.pomo-btn-primary {
  border: none;
  background: linear-gradient(135deg, var(--pomo-focus), #6d28d9);
  color: #fff;
  box-shadow: 0 4px 20px rgba(139, 92, 246, 0.45);
}

.pomo-btn-primary:hover {
  filter: brightness(1.08);
}

.pomo-btn:active {
  transform: scale(0.98);
}

.ads-container {
  margin: 40px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--pomo-card-bg);
  border: 1px solid var(--pomo-card-border);
  border-radius: var(--pomo-radius);
  color: var(--pomo-text-muted);
  font-size: 0.85rem;
}

.ads-rail {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 160px;
  margin: 0;
  display: none;
  z-index: 5;
}

.ads-rail-left {
  left: 16px;
}

.ads-rail-right {
  right: 16px;
}

@media (min-width: 892px) {
  .ads-rail {
    display: flex;
  }
}

.info-section {
  margin-top: 24px;
}

.info-section h2 {
  color: #c4b5fd;
  font-size: 1.35rem;
  margin-top: 32px;
}

.faq-list .faq-item {
  margin-bottom: 16px;
}

.faq-list dt {
  font-weight: 600;
  color: var(--pomo-text);
  margin-bottom: 4px;
}

.faq-list dd {
  margin: 0;
  color: var(--pomo-text-muted);
}

.footer-links {
  margin: 8px 0 0;
}

.footer-links a {
  color: var(--pomo-text-muted);
  text-decoration: underline;
}

.footer-links a:hover {
  color: var(--pomo-focus);
}

.page-footer {
  text-align: center;
  padding: 24px 16px 40px;
  color: var(--pomo-text-muted);
  font-size: 0.85rem;
}

.scroll-top-btn {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 20;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--pomo-focus);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 2px 14px rgba(139, 92, 246, 0.5);
  transition: background 0.12s ease, transform 0.12s ease;
}

.scroll-top-btn:hover {
  background: #6d28d9;
  transform: translateY(-2px);
}

.scroll-top-btn[hidden] {
  display: none;
}

@media (max-width: 480px) {
  .page-header h1 {
    font-size: 1.7rem;
  }

  .pomo-time {
    font-size: 2.6rem;
  }

  .pomo-tabs {
    gap: 2px;
  }

  .pomo-tab {
    padding: 7px 10px;
    font-size: 0.74rem;
  }

  .pomo-time-inputs input {
    width: 52px;
  }
}