/* Rank Checker — Giao diện trắng hiện đại tối tân */

:root {
  --bg: #ffffff;
  --bg-elevated: #f8fafc;
  --bg-card: #ffffff;
  --border: rgba(15, 23, 42, 0.08);
  --border-focus: rgba(14, 165, 233, 0.4);
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #0ea5e9;
  --accent-hover: #0284c7;
  --accent-soft: rgba(14, 165, 233, 0.1);
  --success: #10b981;
  --success-soft: rgba(16, 185, 129, 0.08);
  --warning: #f59e0b;
  --error: #ef4444;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.08);
  --font: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 100% 60% at 50% -10%, rgba(14, 165, 233, 0.04), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
}

/* Top banner - hướng dẫn API */
.top-banner {
  background: linear-gradient(90deg, #0ea5e9 0%, #0284c7 100%);
  color: white;
  padding: 0.6rem 1.5rem;
  text-align: center;
  font-size: 0.8125rem;
  font-weight: 500;
}

.top-banner a {
  color: white;
  text-decoration: underline;
  font-weight: 600;
}

.top-banner a:hover {
  opacity: 0.9;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  margin-bottom: 2rem;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  color: var(--accent);
  font-size: 1.25rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.tabs {
  display: flex;
  gap: 0.25rem;
}

.tab-btn {
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text);
  border-color: var(--border-focus);
}

.tab-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.admin-login-prompt a {
  color: var(--accent);
  font-weight: 600;
}

.admin-login-prompt a:hover {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

.balance {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.lang-btn {
  font-family: var(--font);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  border-color: var(--border-focus);
  color: var(--text);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

/* Form */
.label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.input,
.textarea {
  width: 100%;
  font-family: var(--font);
  font-size: 0.9375rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.input::placeholder,
.textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

.textarea {
  resize: vertical;
  min-height: 140px;
}

.config-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-group {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

.input-group .input {
  flex: 1;
}

.balance-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.balance-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
}

.balance-value {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--accent);
}

.field {
  margin-bottom: 1.25rem;
}

.field:last-of-type {
  margin-bottom: 0;
}

.field-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

/* Buttons */
.btn {
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.875rem 1.5rem;
  font-size: 0.9375rem;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--border-focus);
  background: var(--bg);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-outline:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--bg-elevated);
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(1.1);
}

/* Actions */
.actions-row {
  display: flex;
  gap: 1rem;
}

.actions-row .btn {
  flex: 1;
}

/* Captcha */
.captcha-card {
  margin-bottom: 1.25rem;
}

.captcha-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.captcha-hint {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.captcha-session-ok {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
}

.save-history-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  cursor: pointer;
}

.save-history-label input {
  cursor: pointer;
}

/* Admin */
.main-admin {
  padding-top: 0;
}

.admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.admin-total {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.admin-table th,
.admin-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.admin-table tbody tr:hover {
  background: var(--bg-elevated);
}

.admin-actions {
  display: flex;
  gap: 0.5rem;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.pagination button {
  font-family: var(--font);
  font-size: 0.8125rem;
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s ease;
}

.pagination button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination button.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.pagination .page-info {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.pagination .page-ellipsis {
  font-size: 0.8125rem;
  color: var(--text-muted);
  padding: 0 0.25rem;
  user-select: none;
}

.pagination .page-num {
  min-width: 2rem;
}

/* Log card */
.log-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.log-card-header .card-title {
  margin-bottom: 0;
}

.log-estimate {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  padding: 0.25rem 0.5rem;
  background: var(--accent-soft);
  border-radius: var(--radius-sm);
  display: none;
}

/* Log console */
.log-console {
  font-family: "SF Mono", "Monaco", "Consolas", "Liberation Mono", monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  padding: 1rem 1.25rem;
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 180px;
  max-height: 280px;
  overflow-y: auto;
  color: #475569;
}

.log-console .log-line {
  word-break: break-word;
}

.log-console .log-line.success {
  color: var(--success);
}

.log-console .log-line.error {
  color: var(--error);
}

.log-console .log-line.warn {
  color: var(--warning);
}

/* Footer */
.footer {
  margin-top: auto;
  padding-top: 2rem;
  text-align: center;
}

.footer-link {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--accent);
}

/* Loading state */
.loading .btn-primary {
  position: relative;
  color: transparent;
}

.loading .btn-primary::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Toast / notification */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.75rem 1.25rem;
  background: var(--text);
  color: white;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 1000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  background: var(--success);
}

.toast.error {
  background: var(--error);
}