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

:root {
  --primary: #2E7D32;
  --primary-dark: #1B5E20;
  --primary-mid: #43A047;
  --primary-light: #E8F5E9;
  --surface: #FFFFFF;
  --bg: #F1F8E9;
  --text: #1A2D1A;
  --text-secondary: #388E3C;
  --border: #C8E6C9;
  --unset: #90A4AE;
  --danger: #C62828;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 2px 10px rgba(46, 125, 50, 0.10);
  --shadow-card: 0 4px 18px rgba(46, 125, 50, 0.16);
}

html, body {
  height: 100%;
  font-family: 'Noto Sans KR', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  background:
    radial-gradient(circle at top, rgba(129, 199, 132, 0.28), transparent 34rem),
    var(--bg);
  color: var(--text);
  -webkit-tap-highlight-color: transparent;
}

/* ── App Shell ── */
#app-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 640px;
  margin: 0 auto;
}

header {
  background: rgba(255, 255, 255, 0.86);
  color: var(--primary-dark);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(200, 230, 201, 0.78);
  box-shadow: 0 6px 18px rgba(46, 125, 50, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

header.main-header-hidden {
  display: none;
}

header h1 {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  opacity: 0.82;
}

.icon-btn {
  background: var(--primary-light);
  border: 1px solid #A5D6A7;
  color: var(--primary-dark);
  height: 36px;
  padding: 0 14px;
  border-radius: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: 0.01em;
  transition: background 0.2s;
  white-space: nowrap;
}
.icon-btn:hover { background: #C8E6C9; }

main { flex: 1; padding: 18px 16px 16px; }

footer {
  text-align: center;
  padding: 14px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  opacity: 0.7;
  letter-spacing: 0.02em;
}

/* ── Install / Tip Banner ── */
.install-banner {
  background: var(--primary-light);
  border: 1.5px solid #A5D6A7;
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.84rem;
  color: var(--primary-dark);
}
.install-banner p { flex: 1; line-height: 1.45; }
.install-btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 7px 13px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.dismiss-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  flex-shrink: 0;
}

.tip-box {
  background: #FFFDE7;
  border: 1.5px solid #FFD54F;
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.82rem;
  color: #5D4037;
  margin-bottom: 14px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}
.tip-box .tip-close {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: #8D6E63;
  margin-left: auto;
  flex-shrink: 0;
}

/* ── Main View ── */
.hero-card {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(232, 245, 233, 0.96)),
    var(--surface);
  border: 1.5px solid rgba(165, 214, 167, 0.72);
  border-radius: 24px;
  box-shadow: 0 10px 34px rgba(46, 125, 50, 0.14);
  padding: 30px 22px 28px;
  margin: clamp(42px, 9vh, 86px) 0 24px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}

.hero-card:hover {
  border-color: #81C784;
  box-shadow: 0 14px 38px rgba(46, 125, 50, 0.18);
  transform: translateY(-2px);
}

.hero-card:active {
  transform: scale(0.98);
}

.hero-card:focus-visible {
  outline: 3px solid rgba(67, 160, 71, 0.32);
  outline-offset: 3px;
}

.hero-card::before {
  content: '';
  position: absolute;
  inset: -60px -52px auto auto;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: rgba(67, 160, 71, 0.14);
}

.hero-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 14px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-mid));
  color: white;
  font-size: 2rem;
  box-shadow: 0 8px 20px rgba(46, 125, 50, 0.24);
}

.hero-card h2 {
  position: relative;
  font-size: clamp(1.65rem, 7vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -0.04em;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.hero-status {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 13px;
  border-radius: 999px;
  background: rgba(232, 245, 233, 0.9);
  border: 1px solid #C8E6C9;
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.section-label {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.empty-state {
  text-align: center;
  padding: 6px 20px 32px;
  color: var(--text-secondary);
}
.empty-state h2 { font-size: 1.05rem; margin-bottom: 8px; color: var(--text); }
.empty-state p { font-size: 0.88rem; line-height: 1.5; }

.subject-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
}
@media (max-width: 360px) { .subject-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 480px) { .subject-grid { grid-template-columns: repeat(4, 1fr); } }

.subject-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 16px 10px 14px;
  border: 2px solid var(--btn-color, var(--primary));
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.15s, box-shadow 0.15s;
  min-height: 96px;
  background: color-mix(in srgb, var(--btn-color, var(--primary)) 7%, white);
}
.subject-btn:active { transform: scale(0.95); }
.subject-btn:hover { box-shadow: var(--shadow-card); transform: translateY(-2px); }

.subject-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 2px;
  border-radius: 15px;
  background: color-mix(in srgb, var(--btn-color, var(--primary)) 16%, white);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--btn-color, var(--primary)) 30%, white);
  font-size: 1.4rem;
}

.subject-name { font-size: 1.05rem; font-weight: 700; }
.subject-site {
  font-size: 0.68rem;
  color: var(--text-secondary);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 4px;
}

/* ── Settings View ── */
.settings-section { margin-bottom: 20px; }

.section-header {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  padding: 0 2px;
}

/* 과목 설정 행 */
.setting-row {
  background: var(--surface);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.row-top {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
}

.row-name { font-weight: 700; font-size: 0.92rem; min-width: 36px; flex-shrink: 0; }

/* 색상 선택 */
.color-swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.15);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  display: block;
  transition: transform 0.15s, border-color 0.15s;
  overflow: hidden;
}
.color-swatch:hover { transform: scale(1.15); border-color: rgba(0,0,0,0.3); }

.move-controls {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}
.move-btn {
  width: 24px;
  height: 16px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: white;
  color: var(--text-secondary);
  font-size: 0.58rem;
  line-height: 1;
  cursor: pointer;
  font-family: inherit;
}
.move-btn:hover:not(:disabled) {
  background: var(--primary-light);
  border-color: #A5D6A7;
  color: var(--primary-dark);
}
.move-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.color-input {
  position: absolute;
  opacity: 0;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  cursor: pointer;
  border: none;
  padding: 0;
}

.pub-select {
  flex: 1;
  padding: 8px 30px 8px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.83rem;
  font-family: inherit;
  background: white;
  color: var(--text);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7' viewBox='0 0 10 7'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23388E3C' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  transition: border-color 0.15s;
  min-width: 0;
}
.pub-select:focus { outline: none; border-color: var(--primary); }

/* 표시/숨김 버튼 */
.vis-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  padding: 0 9px;
  height: 34px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  color: var(--unset);
  white-space: nowrap;
}
.vis-btn.active {
  background: var(--primary-light);
  border-color: var(--primary-mid);
  color: var(--primary-dark);
}
.vis-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* 삭제 버튼 */
.del-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  padding: 0 9px;
  height: 34px;
  color: #9E9E9E;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  white-space: nowrap;
}
.del-btn:hover { color: var(--danger); border-color: var(--danger); background: #FFF5F5; }

/* URL 행 */
.row-url {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--border);
}
.row-url.hidden { display: none; }

.url-input {
  flex: 1;
  padding: 8px 10px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.8rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  min-width: 0;
}
.url-input:focus { outline: none; border-color: var(--primary); background: white; }
.url-input[readonly] { background: #F5F5F5; color: var(--text-secondary); }

.open-link {
  background: var(--primary-light);
  border: 1.5px solid #A5D6A7;
  color: var(--primary-dark);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.open-link:hover { background: #C8E6C9; }

/* 과목 추가 */
.add-box {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
}
.add-row { display: flex; gap: 8px; }
.add-input {
  flex: 1;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
}
.add-input:focus { outline: none; border-color: var(--primary); }
.add-btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 700;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.add-btn:hover { background: var(--primary-dark); }

.browser-guide {
  margin-top: 14px;
  padding: 12px 14px;
  background: #F7FBF3;
  border: 1px solid #DDEED2;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.84rem;
  line-height: 1.55;
}
.browser-guide p + p { margin-top: 6px; }

/* 저장/취소 */
.settings-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
  padding-bottom: 8px;
}
.btn-save {
  flex: 1;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-save:hover { background: var(--primary-dark); }
.btn-cancel {
  background: white;
  color: var(--text-secondary);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}
.btn-cancel:hover { background: var(--bg); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  animation: fadeIn 0.15s;
}
.modal-box {
  background: white;
  border-radius: var(--radius);
  padding: 26px 22px 18px;
  max-width: 340px;
  width: 100%;
  box-shadow: 0 8px 40px rgba(0,0,0,0.18);
  animation: slideUp 0.2s;
}
.modal-box h3 { font-size: 1rem; margin-bottom: 8px; }
.modal-box p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.5; margin-bottom: 18px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; }
.modal-actions button { padding: 9px 18px; border-radius: 8px; font-size: 0.88rem; font-weight: 600; font-family: inherit; cursor: pointer; border: none; }
.modal-confirm { background: var(--danger); color: white; }
.modal-cancel { background: var(--bg); color: var(--text-secondary); }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: #1B5E20;
  color: white;
  padding: 11px 22px;
  border-radius: 24px;
  font-size: 0.87rem;
  font-weight: 500;
  z-index: 200;
  transition: transform 0.3s cubic-bezier(.34,1.56,.64,1), opacity 0.3s;
  opacity: 0;
  white-space: nowrap;
  max-width: calc(100vw - 40px);
  text-align: center;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }