/* Modern Dark Theme Design System */
:root {
  --bg-main: #0b0f19;
  --bg-card: #151c2c;
  --bg-card-hover: #1c253b;
  --bg-input: #0f1422;
  --border-color: #26334d;
  --border-focus: #3b82f6;
  
  --text-main: #f3f4f6;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  --color-purple: #8b5cf6;
  --color-cyan: #06b6d4;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Typography & Utility */
.font-mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-muted); }
.hidden { display: none !important; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}
.btn-block { width: 100%; }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.85rem; }
.btn-primary { background-color: var(--color-primary); color: #fff; }
.btn-primary:hover { background-color: var(--color-primary-hover); }
.btn-secondary { background-color: #1e293b; color: var(--text-main); border-color: var(--border-color); }
.btn-secondary:hover { background-color: #334155; }
.btn-danger { background-color: var(--color-danger); color: #fff; }
.btn-danger:hover { background-color: var(--color-danger-hover); }
.btn-outline { background: transparent; color: var(--text-muted); border-color: var(--border-color); }
.btn-outline:hover { color: var(--text-main); border-color: #475569; }
.btn-text { background: transparent; border: none; color: var(--color-primary); cursor: pointer; font-size: 0.85rem; }
.btn-text:hover { text-decoration: underline; }

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  font-size: 1.1rem;
}
.icon-btn:hover { color: var(--text-main); }

/* Inputs */
.input-group {
  margin-bottom: 1.1rem;
}
.input-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  font-weight: 500;
}
.input-dark, input[type="text"], input[type="password"], input[type="number"], input[type="url"] {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}
.input-dark:focus, input:focus {
  border-color: var(--border-focus);
}
.help-text {
  display: block;
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}

/* ================= LOGIN PAGE ================= */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 30%, #172554 0%, #0b0f19 70%);
}
.login-wrapper {
  width: 100%;
  max-width: 400px;
  padding: 1.5rem;
}
.login-card {
  background-color: rgba(21, 28, 44, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.2rem 2rem;
  box-shadow: var(--shadow-card);
}
.login-header {
  text-align: center;
  margin-bottom: 2rem;
}
.logo-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}
.login-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.subtitle {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 0.2rem;
}
.password-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.password-input-wrapper input {
  padding-right: 2.5rem;
}
.password-input-wrapper .icon-btn {
  position: absolute;
  right: 0.5rem;
}
.error-banner {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}
.login-footer {
  margin-top: 1.8rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ================= DASHBOARD HEADER ================= */
.header {
  height: 64px;
  background-color: rgba(15, 20, 34, 0.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.header-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.05rem;
}
.logo-emoji { font-size: 1.3rem; }
.live-clock {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all 0.2s ease;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.status-online {
  background-color: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
}
.status-online .status-dot {
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
}
.status-offline {
  background-color: rgba(100, 116, 139, 0.15);
  border: 1px solid rgba(100, 116, 139, 0.4);
  color: #94a3b8;
}
.status-offline .status-dot {
  background-color: #64748b;
}

/* ================= DASHBOARD MAIN ================= */
.main-container {
  max-width: 1200px;
  margin: 1.5rem auto;
  padding: 0 1.5rem 3rem;
}

/* Top Banner */
.banner-card {
  background: linear-gradient(135deg, #1e293b 0%, #111827 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-card);
}
.banner-info h2 {
  font-size: 1.35rem;
  font-weight: 700;
}
.banner-meta {
  display: flex;
  gap: 1.8rem;
}
.meta-item {
  display: flex;
  flex-direction: column;
}
.meta-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.meta-value {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Grid Layout */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 1.5rem;
}

/* Card Common */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  box-shadow: var(--shadow-card);
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}
.card-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
}
.badge-pill {
  font-size: 0.75rem;
  background-color: #1e293b;
  color: var(--color-cyan);
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* Power Buttons Grid */
.power-buttons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.btn-power {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: #0f172a;
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-power:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}
.power-icon {
  font-size: 1.6rem;
}
.power-texts {
  display: flex;
  flex-direction: column;
}
.power-title {
  font-weight: 600;
  font-size: 0.95rem;
}
.power-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.btn-power-wol {
  border-color: rgba(59, 130, 246, 0.4);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(15, 23, 42, 0.9) 100%);
}
.btn-power-wol:hover {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.25) 0%, rgba(15, 23, 42, 0.9) 100%);
}
.btn-power-off {
  border-color: rgba(239, 68, 68, 0.4);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15) 0%, rgba(15, 23, 42, 0.9) 100%);
}
.btn-power-off:hover {
  border-color: var(--color-danger);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.25) 0%, rgba(15, 23, 42, 0.9) 100%);
}
.btn-power-restart:hover { border-color: var(--color-warning); }
.btn-power-sleep:hover { border-color: var(--color-purple); }
.btn-power-lock:hover { border-color: #64748b; }
.btn-power-abort:hover { border-color: var(--color-success); }

.wol-status-bar {
  margin-top: 1rem;
  padding: 0.6rem 0.8rem;
  background-color: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}
.wol-info-tag { color: var(--text-dim); }

/* System Stats */
.metrics-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.metric-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.metric-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}
.progress-bar-bg {
  height: 8px;
  background-color: #1e293b;
  border-radius: 9999px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 9999px;
  transition: width 0.4s ease;
}
.fill-blue { background-color: var(--color-primary); }
.fill-purple { background-color: var(--color-purple); }
.fill-emerald { background-color: var(--color-success); }

.system-specs-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 1rem;
}
.spec-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}
.spec-name { color: var(--text-dim); }
.spec-val { color: var(--text-main); }

/* Extensions Section */
.tabs-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}
.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem 0.8rem;
  font-size: 0.85rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}
.tab-pane {
  display: none;
}
.tab-pane.active {
  display: block;
}
.tab-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}
.command-input-group {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.console-output-wrapper {
  background-color: #0b0f19;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.6rem;
}
.console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-dim);
  border-bottom: 1px solid #1e293b;
  padding-bottom: 0.4rem;
  margin-bottom: 0.5rem;
}
.console-box {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #38bdf8;
  max-height: 140px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.guide-box {
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.85rem;
}
.guide-box h4 {
  margin-bottom: 0.5rem;
  color: #fbbf24;
}
.code-preview {
  background-color: #0b0f19;
  padding: 0.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #a7f3d0;
  margin: 0.6rem 0;
  overflow-x: auto;
}

/* ================= MODALS ================= */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 100;
}
.modal-content {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  animation: modalFadeIn 0.2s ease;
}
.modal-sm { max-width: 380px; }
.modal-lg { max-width: 650px; }
@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.4rem;
  border-bottom: 1px solid var(--border-color);
}
.modal-header h3 { font-size: 1.1rem; }
.modal-body {
  padding: 1.4rem;
  max-height: 75vh;
  overflow-y: auto;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
  padding: 1rem 1.4rem;
  border-top: 1px solid var(--border-color);
  background-color: rgba(0, 0, 0, 0.15);
}

/* Agent Guide Modal Elements */
.download-banner {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(30, 41, 59, 0.6) 100%);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.2rem;
}
.download-banner strong { font-size: 0.95rem; }
.download-banner p { font-size: 0.8rem; color: var(--text-muted); }
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.step-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}
.step-num {
  width: 28px;
  height: 28px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.step-content strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
}
.step-content p, .step-content ul {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.step-content ul {
  padding-left: 1.2rem;
  margin-top: 0.3rem;
}
.step-content code {
  background-color: #0b0f19;
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
  color: #38bdf8;
  font-family: var(--font-mono);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 200;
}
.toast {
  background-color: #1e293b;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: toastSlideIn 0.2s ease;
  min-width: 250px;
}
.toast-success { border-left: 4px solid var(--color-success); }
.toast-error { border-left: 4px solid var(--color-danger); }
.toast-info { border-left: 4px solid var(--color-primary); }
@keyframes toastSlideIn {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .header { padding: 0 1rem; }
  .header-title { display: none; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .power-buttons-grid { grid-template-columns: 1fr; }
  .banner-meta { width: 100%; justify-content: space-between; }
}