@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Sans+JP:wght@300;400;500;600;700&display=swap');

/* ===== CSS Variables ===== */
:root {
  --color-bg: #0f1117;
  --color-bg-card: #1a1d27;
  --color-bg-input: #252833;
  --color-bg-hover: #2a2d3a;
  --color-border: #2e3140;
  --color-border-focus: #5b7fff;
  --color-text: #e8eaf0;
  --color-text-muted: #8b8fa3;
  --color-text-dim: #5c6078;
  --color-primary: #5b7fff;
  --color-primary-hover: #7b99ff;
  --color-primary-glow: rgba(91, 127, 255, 0.15);
  --color-danger: #ff5c6a;
  --color-danger-hover: #ff7a85;
  --color-success: #3dd68c;
  --color-warning: #ffb84d;
  --color-warning-bg: rgba(255, 184, 77, 0.08);
  --color-warning-border: rgba(255, 184, 77, 0.25);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-hover);
}

/* ===== Layout ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ===== Header ===== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--color-primary), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header .badge {
  font-size: 0.7rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  border: 1px solid rgba(91, 127, 255, 0.2);
}

/* ===== Alert / Notice ===== */
.notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  margin-bottom: 28px;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-warning);
}

.notice-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
  margin-top: 1px;
}

/* ===== Card ===== */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-title .icon {
  font-size: 1.1rem;
}

/* ===== Form ===== */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.form-input {
  background: var(--color-bg-input);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--color-text);
  font-family: var(--font-sans);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-input::placeholder {
  color: var(--color-text-dim);
}

.form-input[type="file"] {
  padding: 8px 14px;
  cursor: pointer;
}

.form-input[type="file"]::file-selector-button {
  background: var(--color-bg-hover);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
  color: var(--color-text);
  font-size: 0.8rem;
  font-family: var(--font-sans);
  cursor: pointer;
  margin-right: 10px;
  transition: background var(--transition);
}

.form-input[type="file"]::file-selector-button:hover {
  background: var(--color-border);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #4a6de5);
  color: #fff;
  box-shadow: 0 2px 8px rgba(91, 127, 255, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-hover), #5b7fff);
  box-shadow: 0 4px 16px rgba(91, 127, 255, 0.4);
  transform: translateY(-1px);
  color: #fff;
}

.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border: 1px solid rgba(255, 92, 106, 0.3);
  padding: 6px 14px;
  font-size: 0.78rem;
}

.btn-danger:hover {
  background: rgba(255, 92, 106, 0.1);
  border-color: var(--color-danger);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
}

.btn-copy {
  background: var(--color-bg-input);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  padding: 4px 10px;
  font-size: 0.72rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-copy.copied {
  background: rgba(61, 214, 140, 0.1);
  border-color: rgba(61, 214, 140, 0.3);
  color: var(--color-success);
}

/* ===== Table ===== */
.table-wrap {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.85rem;
}

.table thead th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.table tbody tr {
  transition: background var(--transition);
}

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

.table tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(46, 49, 64, 0.5);
  vertical-align: middle;
}

.table .client-name {
  font-weight: 600;
  color: var(--color-primary);
  transition: color var(--transition);
}

.table .client-name:hover {
  color: var(--color-primary-hover);
}

.table .url-cell {
  display: flex;
  align-items: center;
  gap: 8px;
}

.table .url-text {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.78rem;
  color: var(--color-text-dim);
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.table .view-count {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 500;
  color: var(--color-text-muted);
}

.table .view-count .count-num {
  font-weight: 700;
  color: var(--color-text);
}

.table .date-cell {
  color: var(--color-text-muted);
  white-space: nowrap;
}

.table .expire-warning {
  color: var(--color-danger);
  font-size: 0.72rem;
  display: block;
  margin-top: 2px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-dim);
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.9rem;
}

/* ===== Upload progress ===== */
.upload-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.upload-overlay.active {
  display: flex;
}

.upload-modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  min-width: 320px;
}

.upload-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 20px;
}

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

.upload-modal p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  background: rgba(61, 214, 140, 0.15);
  border: 1px solid rgba(61, 214, 140, 0.3);
  color: var(--color-success);
}

.toast.error {
  background: rgba(255, 92, 106, 0.15);
  border: 1px solid rgba(255, 92, 106, 0.3);
  color: var(--color-danger);
}

/* ===== Auth Page ===== */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
}

.auth-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.auth-card .auth-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.auth-card h1 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.auth-card .auth-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
}

.auth-card .form-group {
  text-align: left;
  margin-bottom: 20px;
}

.auth-card .btn-primary {
  width: 100%;
  padding: 12px;
}

.auth-error {
  color: var(--color-danger);
  font-size: 0.82rem;
  margin-bottom: 16px;
  padding: 10px 14px;
  background: rgba(255, 92, 106, 0.08);
  border: 1px solid rgba(255, 92, 106, 0.2);
  border-radius: var(--radius-sm);
  display: none;
}

.auth-error.show {
  display: block;
}

/* ===== Viewer Page ===== */
.viewer-page {
  min-height: 100vh;
  background: #e8eaf0;
}

.viewer-header {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.viewer-header h1 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.viewer-header h1 .client-label {
  color: var(--color-primary);
}

.viewer-header .viewer-note {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.viewer-body {
  display: flex;
  justify-content: center;
  padding: 32px 24px;
  overflow-x: auto;
}

.viewer-frame-wrap {
  width: 1200px;
  min-width: 1200px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.viewer-frame-wrap iframe {
  width: 1200px;
  height: calc(100vh - 120px);
  border: none;
  display: block;
}

/* ===== Responsive (Admin only) ===== */
@media (max-width: 768px) {
  .container {
    padding: 20px 16px;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .header h1 {
    font-size: 1.2rem;
  }
  
  .card {
    padding: 20px;
  }
}

/* ===== Delete confirm ===== */
.confirm-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.confirm-overlay.active {
  display: flex;
}

.confirm-modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  max-width: 380px;
  width: 100%;
}

.confirm-modal h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.confirm-modal p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.confirm-modal .confirm-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.confirm-modal .btn-cancel {
  background: var(--color-bg-input);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.confirm-modal .btn-cancel:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

/* ===== Password Badge ===== */
.pw-cell {
  display: flex;
  align-items: center;
  gap: 6px;
}

.pw-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 500;
}

.pw-badge.pw-on {
  background: rgba(91, 127, 255, 0.12);
  color: var(--color-primary);
}

.pw-badge.pw-off {
  color: var(--color-text-dim);
}

/* ===== Settings Message ===== */
.settings-msg {
  font-size: 0.82rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}

.settings-msg.success {
  background: rgba(61, 214, 140, 0.08);
  border: 1px solid rgba(61, 214, 140, 0.2);
  color: var(--color-success);
}

.settings-msg.error {
  background: rgba(255, 92, 106, 0.08);
  border: 1px solid rgba(255, 92, 106, 0.2);
  color: var(--color-danger);
}

/* ===== 3-column form grid ===== */
.form-grid-3 {
  grid-template-columns: 1fr 1fr 1fr;
}

@media (max-width: 768px) {
  .form-grid-3 {
    grid-template-columns: 1fr;
  }
}