/* === RESET & BASE === */
* { box-sizing: border-box; outline: none; }
body {
  font-family: 'Montserrat', sans-serif; margin: 0; min-height: 100vh;
  display: flex; flex-direction: column; background-color: #f3f4f6; color: #374151;
}

/* === HEADER === */
.app-header {
  background: white; border-bottom: 1px solid #e5e7eb; padding: 0 20px; height: 60px;
  display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100;
}
.donate-info { display: flex; align-items: center; gap: 8px; font-size: 11px; }
.donate-label { background: #dc2626; color: white; padding: 2px 6px; border-radius: 4px; font-weight: 800; font-size: 10px; }
.donate-details { font-weight: 700; color: #1f2937; }

.tabs { display: flex; gap: 5px; height: 100%; align-items: flex-end; }
.tab-button {
  border: none; background: transparent; padding: 0 20px; height: 45px;
  cursor: pointer; font-weight: 600; color: #6b7280; border-bottom: 3px solid transparent;
  text-transform: uppercase; font-size: 13px; transition: 0.2s;
}
.tab-button.active { color: #2563eb; border-bottom-color: #2563eb; background: #eff6ff; }

/* === LAYOUT === */
.app-body { flex: 1; padding: 15px; display: flex; flex-direction: column; }
.tab-content { display: none; flex-direction: column; width: 100%; }
.tab-content.active { display: flex; }

/* Settings Layout */
.settings-layout {
    display: flex; background: white; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    min-height: calc(100vh - 100px); overflow: hidden; max-width: 1400px; margin: 0 auto; width: 100%;
}
.settings-sidebar {
    width: 250px; background: #f9fafb; border-right: 1px solid #e5e7eb; padding: 20px 0; flex-shrink: 0;
}
.sidebar-title { padding: 0 20px 10px; font-size: 11px; font-weight: 800; color: #9ca3af; margin-top: 10px; }
.sidebar-btn {
    width: 100%; text-align: left; padding: 12px 20px; border: none; background: transparent;
    font-size: 13px; font-weight: 600; color: #4b5563; cursor: pointer; border-left: 3px solid transparent; display: flex; gap: 10px; align-items: center;
}
.sidebar-btn.active { background: white; color: #2563eb; border-left-color: #2563eb; box-shadow: 0 1px 2px rgba(0,0,0,0.05); }

.settings-content { flex: 1; display: flex; flex-direction: column; }
.setting-panel { display: none; flex-direction: column; width: 100%; padding-bottom: 50px; } /* Padding bottom để scroll không bị che */
.setting-panel.active { display: flex; }

.panel-header { padding: 15px 20px; border-bottom: 1px solid #eee; display: flex; justify-content: space-between; align-items: center; background: white; position: sticky; top: 0; z-index: 10; }
.panel-header h2 { margin: 0; font-size: 16px; color: #111827; }

/* === KEY INFO PANEL === */
.key-info-container { padding: 20px; display: flex; flex-direction: column; gap: 20px; }
.key-card { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 15px; }
.key-row { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-bottom: 1px dashed #e2e8f0; }
.key-row:last-child { border-bottom: none; }
.key-value-group { display: flex; align-items: center; gap: 10px; font-family: monospace; font-size: 15px; font-weight: 700; color: #1e40af; }
.btn-icon { background: none; border: none; cursor: pointer; color: #64748b; }

.timer-card { background: white; border: 1px solid #cbd5e1; border-radius: 8px; padding: 20px; }
.timer-card h3 { margin: 0 0 15px 0; font-size: 14px; color: #334155; }
.timer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 15px; }
.time-box { background: #f1f5f9; padding: 10px; border-radius: 6px; text-align: center; }
.time-label { display: block; font-size: 11px; color: #64748b; margin-bottom: 5px; text-transform: uppercase; }
.time-val { font-family: monospace; font-size: 20px; font-weight: 700; color: #0f172a; }

.progress-bar-bg { height: 8px; background: #e2e8f0; border-radius: 4px; overflow: hidden; margin-bottom: 10px; }
.progress-bar-fill { height: 100%; background: #10b981; width: 0%; transition: width 1s linear; }
.dates-row { display: flex; justify-content: space-between; font-size: 11px; color: #64748b; }

.alert-box { padding: 15px; border-radius: 6px; display: flex; gap: 10px; align-items: center; font-size: 13px; }
.alert-box.warning { background: #fffbeb; color: #b45309; border: 1px solid #fcd34d; }
.hidden { display: none !important; }

/* === REPLACEMENTS === */
/* Important: Scroll entire page, not just list */
.list-container-wrapper { padding: 0 20px; } 
.punctuation-item { display: flex; gap: 8px; margin-bottom: 8px; align-items: center; background: white; padding: 8px 10px; border-radius: 6px; border: 1px solid #e5e7eb; }
.punctuation-item .index-badge { width: 25px; height: 25px; background: #e5e7eb; color: #6b7280; display: flex; justify-content: center; align-items: center; border-radius: 50%; font-size: 10px; font-weight: 700; flex-shrink: 0; }
.punctuation-item input { flex: 1; padding: 8px; border: 1px solid #d1d5db; border-radius: 4px; }
.toolbar { padding: 10px 20px; background: #f9fafb; display: flex; gap: 8px; flex-wrap: wrap; }
.list-actions { padding: 10px 20px; display: flex; gap: 10px; position: sticky; top: 56px; background: #fff; z-index: 9; border-bottom: 1px solid #f3f4f6; }

/* === MODALS === */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 2000; display: none; justify-content: center; align-items: center; backdrop-filter: blur(3px); }
.modal-overlay.active { display: flex; }
.login-card { background: white; padding: 40px; border-radius: 12px; width: 100%; max-width: 420px; box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); text-align: center; }
.login-card h2 { margin-top: 0; color: #1e3a8a; }
.w-full-input { width: 100%; padding: 12px; border: 1px solid #cbd5e1; border-radius: 8px; margin-bottom: 15px; font-size: 15px; text-align: center; letter-spacing: 1px; }
.divider { display: flex; align-items: center; text-align: center; margin: 20px 0; color: #9ca3af; font-size: 12px; }
.divider::before, .divider::after { content: ''; flex: 1; border-bottom: 1px solid #e5e7eb; }
.divider span { padding: 0 10px; }

/* BUY MODAL */
.large-modal { background: white; width: 900px; max-width: 95vw; border-radius: 12px; padding: 30px; position: relative; max-height: 90vh; overflow-y: auto; display: flex; flex-direction: column; }
.modal-close { position: absolute; top: 15px; right: 15px; background: none; border: none; font-size: 20px; cursor: pointer; color: #6b7280; }
.buy-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 20px; }
@media(max-width: 768px) { .buy-layout { grid-template-columns: 1fr; } }

.option-group { margin-bottom: 20px; }
.option-group label { display: block; font-weight: 700; margin-bottom: 8px; font-size: 13px; color: #374151; }
.toggle-pills { display: flex; gap: 8px; flex-wrap: wrap; }
.pill { padding: 8px 16px; border: 1px solid #d1d5db; border-radius: 20px; cursor: pointer; font-size: 13px; font-weight: 600; color: #4b5563; transition: 0.2s; }
.pill:hover { background: #f3f4f6; }
.pill.active { background: #2563eb; color: white; border-color: #2563eb; box-shadow: 0 2px 5px rgba(37, 99, 235, 0.3); }

.price-display { background: #eff6ff; padding: 15px; border-radius: 8px; text-align: center; margin-bottom: 20px; border: 1px dashed #bfdbfe; }
.price-display strong { display: block; font-size: 24px; color: #1e40af; margin: 5px 0; }
.big-btn { padding: 15px; font-size: 16px; text-transform: uppercase; letter-spacing: 1px; }
.btn-buy { background: #f59e0b; color: white; border: none; padding: 12px; width: 100%; border-radius: 8px; font-weight: 700; cursor: pointer; }

/* Payment Info */
.qr-wrapper { text-align: center; margin-bottom: 20px; padding: 10px; border: 1px solid #e5e7eb; border-radius: 8px; background: white; }
.qr-img { width: 100%; max-width: 250px; height: auto; display: block; margin: 0 auto; }
.qr-hint { font-size: 11px; color: #6b7280; font-style: italic; margin-top: 5px; }
.bank-details { background: #f8fafc; padding: 15px; border-radius: 8px; margin-bottom: 20px; font-size: 13px; }
.detail-row { display: flex; justify-content: space-between; margin-bottom: 10px; align-items: center; }
.detail-row strong { color: #111827; display: flex; align-items: center; gap: 8px; }
.copy-icon { cursor: pointer; color: #6b7280; transition: color 0.2s; }
.copy-icon:hover { color: #2563eb; }
.highlight { background: #fee2e2; padding: 5px 10px; margin: 0 -10px; border-radius: 4px; }
.code-text { font-family: monospace; font-size: 14px; color: #b91c1c; }
.text-red { color: #dc2626; }

/* Common UI */
.btn { padding: 8px 16px; border-radius: 6px; border: none; cursor: pointer; font-weight: 600; color: white; display: inline-flex; align-items: center; justify-content: center; gap: 5px; }
.btn-primary { background: #2563eb; } .btn-primary:hover { background: #1d4ed8; }
.btn-secondary { background: #e5e7eb; color: #374151; }
.btn-success { background: #10b981; } .btn-danger { background: #ef4444; } .btn-warning { background: #f59e0b; }
.full-width { width: 100%; }
.custom-scrollbar { width: 100%; border: none; resize: none; outline: none; padding: 15px; }
textarea { font-family: 'Montserrat', sans-serif; }