/* ==========================================================================
   DESIGN VARIABLES
   ========================================================================== */
:root {
  /* Colors */
  --color-secondary-container: #0053db;
  --color-background: #131313;
  --color-on-primary: #002e6a;
  --color-tertiary-fixed: #ffdcc6;
  --color-tertiary-container: #df7412;
  --color-surface-container-lowest: #0e0e0e;
  --color-tertiary-fixed-dim: #ffb786;
  --color-outline-variant: #424754;
  --color-on-tertiary: #502400;
  --color-surface-container: #201f1f;
  --color-on-error: #690005;
  --color-surface-container-low: #1c1b1b;
  --color-secondary-fixed: #dbe1ff;
  --color-outline: #8c909f;
  --color-on-background: #e5e2e1;
  --color-on-secondary-fixed: #00174b;
  --color-on-surface-variant: #c2c6d6;
  --color-on-tertiary-fixed-variant: #723600;
  --color-surface-container-highest: #353534;
  --color-on-error-container: #ffdad6;
  --color-surface-variant: #353534;
  --color-on-tertiary-fixed: #311400;
  --color-surface: #131313;
  --color-error: #ffb4ab;
  --color-inverse-primary: #005ac2;
  --color-on-tertiary-container: #461f00;
  --color-on-secondary: #002a78;
  --color-inverse-on-surface: #313030;
  --color-on-secondary-fixed-variant: #003ea8;
  --color-on-primary-fixed-variant: #004395;
  --color-surface-container-high: #2a2a2a;
  --color-on-secondary-container: #cdd7ff;
  --color-surface-tint: #adc6ff;
  --color-on-surface: #e5e2e1;
  --color-secondary: #b4c5ff;
  --color-primary-fixed: #d8e2ff;
  --color-secondary-fixed-dim: #b4c5ff;
  --color-error-container: #93000a;
  --color-primary: #adc6ff;
  --color-tertiary: #ffb786;
  --color-primary-container: #4d8eff;
  --color-surface-dim: #131313;
  --color-inverse-surface: #e5e2e1;
  --color-on-primary-fixed: #001a42;
  --color-surface-bright: #393939;
  --color-on-primary-container: #00285d;
  --color-primary-fixed-dim: #adc6ff;

  /* Border Radius */
  --rounded-sm: 0.25rem;
  --rounded-md: 0.5rem;
  --rounded-lg: 0.5rem;
  --rounded-xl: 0.75rem;
  --rounded-full: 9999px;

  /* Spacing */
  --spacing-base-unit: 4px;
  --spacing-margin-desktop: 40px;
  --spacing-container-max: 1440px;
  --spacing-gutter: 24px;
  --spacing-margin-mobile: 16px;

  /* Fonts */
  --font-body-base: 'Inter', sans-serif;
  --font-headline-md: 'Inter', sans-serif;
  --font-label-sm: 'Geist', monospace;
  --font-mono-data: 'Geist', monospace;
}

/* ==========================================================================
   BASE & RESET STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-background);
  color: var(--color-on-background);
  font-family: var(--font-body-base);
  font-size: 16px;
  line-height: 24px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* Custom Scrollbar */
.custom-scroll::-webkit-scrollbar {
  width: 6px;
}
.custom-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.custom-scroll::-webkit-scrollbar-thumb {
  background: #353534;
  border-radius: 10px;
}

/* Material Icons setting */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* Animations */
@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ==========================================================================
   LAYOUT STRUCTURE
   ========================================================================== */

/* Sidebar Navigation */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  height: 100%;
  width: 280px;
  background-color: var(--color-surface-container);
  border-right: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  padding-top: 2rem;
  padding-bottom: 2rem;
  z-index: 50;
}

@media (max-width: 1024px) {
  .sidebar {
   display: none;
  }
}

.sidebar__header {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  margin-bottom: 2.5rem;
}

.sidebar__title {
  font-family: var(--font-headline-md);
  font-size: 24px;
  line-height: 32px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  margin: 0;
}

.sidebar__version {
  color: var(--color-on-surface-variant);
  opacity: 0.6;
  font-family: var(--font-label-sm);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.sidebar__nav {
  flex: 1;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  color: var(--color-on-surface-variant);
  opacity: 0.6;
  text-decoration: none;
  border-radius: var(--rounded-md);
  transition: all 0.3s ease-in-out;
}

.sidebar__link:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--color-on-surface);
  opacity: 1;
}

.sidebar__link--active {
  background-color: rgba(0, 83, 219, 0.2); /* secondary-container/20 */
  color: var(--color-primary);
  opacity: 1;
  border-right: 2px solid var(--color-primary);
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.sidebar__link-text {
  font-family: var(--font-label-sm);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.sidebar__footer {
  margin-top: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar__user {
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sidebar__avatar-wrapper {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  background-color: var(--color-surface-container-high);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.sidebar__avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar__user-details {
  display: flex;
  flex-direction: column;
}

.sidebar__user-name {
  color: var(--color-on-surface);
  font-family: var(--font-label-sm);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.sidebar__user-role {
  color: var(--color-on-surface-variant);
  opacity: 0.6;
  font-size: 10px;
  text-transform: uppercase;
  margin: 0;
}

/* Main Content Canvas */
.app-main {
  margin-left: 280px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

@media (max-width: 1024px) {
  .app-main {
    margin-left: 0;
  }
}

/* Top App Bar */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding-left: var(--spacing-margin-desktop);
  padding-right: var(--spacing-margin-desktop);
  height: 4rem; /* h-16 (64px) */
  background-color: var(--color-background);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  flex-shrink: 0;
}

.app-header__status-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-header__title {
  font-family: var(--font-headline-md);
  font-size: 24px;
  line-height: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-on-background);
  margin: 0;
}

.app-header__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--color-on-surface-variant);
}

.app-header__action-btn {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  padding: 0;
  transition: color 0.2s ease;
}

.app-header__action-btn:hover {
  color: var(--color-primary);
}

.app-header__separator {
  height: 1.5rem;
  width: 1px;
  background-color: rgba(255, 255, 255, 0.1);
  margin-left: 0.5rem;
  margin-right: 0.5rem;
}

/* Page Content */
.app-main__content {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-margin-desktop);
}

.app-main__container {
  max-width: var(--spacing-container-max);
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-gutter);
}

/* Footer Actions */
.app-footer {
  height: 5rem; /* h-20 (80px) */
  background-color: var(--color-surface-container-low);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-left: var(--spacing-margin-desktop);
  padding-right: var(--spacing-margin-desktop);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.app-footer__info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-on-surface-variant);
  font-size: 14px;
  font-style: italic;
}

@media (max-width: 1024px) {
  .app-footer__info {
    display: none;
  }
}

.app-footer__info-icon {
  font-size: 14px;
}

.app-footer__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ==========================================================================
   BENTO GRID LAYOUT
   ========================================================================== */
.grid-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--spacing-gutter);
}

.grid-layout__col-8 {
  grid-column: span 12;
}

.grid-layout__col-4 {
  grid-column: span 12;
}

.grid-layout__col-12 {
  grid-column: span 12;
}

@media (min-width: 1024px) {
  .grid-layout__col-8 {
    grid-column: span 8;
  }
  .grid-layout__col-4 {
    grid-column: span 4;
  }
}

.stat-cards-wrapper {
  display: grid;
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-gutter);
}

/* ==========================================================================
   COMPONENTS
   ========================================================================== */

/* Welcome Section */
.welcome-section__title {
  font-family: var(--font-headline-md);
  font-size: 24px;
  line-height: 32px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.welcome-section__desc {
  color: var(--color-on-surface-variant);
  max-width: 42rem; /* max-w-2xl */
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem; /* py-2.5 px-6 default */
  border-radius: var(--rounded-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: var(--font-body-base);
  font-size: 16px;
  text-decoration: none;
}

@media (max-width: 640px) {
  .btn {
    padding: 0.5rem 1rem; /* py-2 px-4 */
    font-size: 14px;
  }
}

.btn__text {
  display: inline-block;
}

.btn--full {
  width: 100%;
}

.btn--primary {
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  box-shadow: 0 0 12px 0 rgba(59, 130, 246, 0.2); /* glow-primary */
  font-family: var(--font-label-sm);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.btn--primary:hover {
  opacity: 0.9;
}

.btn--danger {
  background-color: var(--color-error-container);
  color: #ffffff;
  box-shadow: 0 0 12px 0 rgba(239, 68, 68, 0.2); /* glow-error */
  font-weight: 700;
}

.btn--danger:hover {
  opacity: 0.9;
}

.btn--outline-primary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
  font-weight: 600;
}

.spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.btn--outline-primary:hover {
  background-color: rgba(173, 198, 255, 0.05); /* primary/5 */
}

.btn--disabled {
  opacity: 0.7 !important;
  cursor: not-allowed !important;
}

/* Status Badge */
.status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--rounded-full);
  border: 1px solid transparent;
  transition: all 0.5s ease;
}

.status-badge__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: var(--rounded-full);
}

.status-badge__text {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Offline Modifier */
.status-badge--offline {
  background-color: rgba(147, 0, 10, 0.2); /* error-container/20 */
  border-color: rgba(255, 180, 171, 0.2); /* error/20 */
}

.status-badge--offline .status-badge__dot {
  background-color: var(--color-error);
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.status-badge--offline .status-badge__text {
  color: var(--color-error);
}

/* Online Modifier */
.status-badge--online {
  background-color: rgba(34, 197, 94, 0.2); /* green-500/20 */
  border-color: rgba(34, 197, 94, 0.2); /* green-500/20 */
}

.status-badge--online .status-badge__dot {
  background-color: #22c55e; /* green-500 */
}

.status-badge--online .status-badge__text {
  color: #22c55e; /* green-500 */
}

/* Upload Zone */
.upload-zone {
  position: relative;
  height: 16rem; /* h-64 */
  background-color: var(--color-surface-container);
  border: 2px dashed rgba(255, 255, 255, 0.1);
  border-radius: var(--rounded-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  transition: all 0.3s ease;
  cursor: pointer;
  overflow: hidden;
}

@media (max-width: 1028px) {
  .upload-zone {
    text-align: center;
  }
}

.upload-zone:hover,
.upload-zone--active {
  border-color: rgba(173, 198, 255, 0.5); /* primary/50 */
  background-color: var(--color-surface-container-high);
}

.upload-zone__bg-glow {
  position: absolute;
  inset: 0;
  opacity: 0.1;
  transition: opacity 0.3s ease;
  pointer-events: none;
  background: radial-gradient(circle at center, var(--color-primary) 0%, transparent 70%);
}

.upload-zone:hover .upload-zone__bg-glow,
.upload-zone--active .upload-zone__bg-glow {
  opacity: 0.2;
}

.upload-zone__icon {
  font-size: 48px;
  color: rgba(173, 198, 255, 0.6); /* primary/60 */
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.upload-zone:hover .upload-zone__icon,
.upload-zone--active .upload-zone__icon {
  color: var(--color-primary);
  transform: scale(1.1);
}

.upload-zone__title {
  color: var(--color-on-surface);
  font-weight: 600;
  font-size: 1.125rem; /* text-lg */
  margin-bottom: 0.25rem;
}

.upload-zone__subtitle {
  color: var(--color-on-surface-variant);
  font-size: 0.875rem; /* text-sm */
  text-align: center;
}

.upload-zone__input {
  display: none;
}

/* Stat Card */
.stat-card {
  background-color: var(--color-surface-container);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--rounded-xl);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.stat-card__label {
  color: var(--color-on-surface-variant);
  font-family: var(--font-label-sm);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.stat-card__value-container {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
}

.stat-card__value {
  font-size: 2.25rem; /* text-4xl */
  font-weight: 700;
  font-family: var(--font-mono-data);
}

.stat-card__suffix {
  color: var(--color-on-surface-variant);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

.stat-card__suffix--error {
  color: var(--color-error);
}

/* Preview Table */
.preview-table {
  background-color: var(--color-surface-container);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--rounded-xl);
  overflow: hidden;
}

.preview-table__header {
  padding: 1rem 1.5rem; /* py-4 px-6 */
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-surface-container-low);
}

.preview-table__title {
  font-weight: 600;
  color: var(--color-on-surface);
}

.preview-table__actions {
  display: flex;
  gap: 0.5rem;
}

.preview-table__table-wrapper {
  overflow-x: auto;
}

/* Generic Table Elements */
.table {
  width: 100%;
  text-align: left;
  border-collapse: collapse;
  max-height: 400px;
  overflow-y: scroll;
}

.table__row {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.table__row td {
  padding: 12px;
}

@media (max-width: 1028px) {
  .table__row td {
    padding: 12px;
  }
}

.table__row:last-child {
  border-bottom: 0;
}

.table__row--active {
  background-color: rgba(34, 197, 94, 0.2); /* green-500/20 */
}

.table__row--active .table__cell {
  color: #22c55e; /* green-500 */
}

.table__row--inactive {
  background-color: rgba(147, 0, 10, 0.2); /* error-container/20 */
}

.table__row--inactive .table__cell {
  color: var(--color-error);
}

.table__row--header {
  background-color: rgba(42, 42, 42, 0.5); /* surface-container-high/50 */
  color: var(--color-on-surface-variant);
  font-family: var(--font-label-sm);
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.table__cell {
  padding: 1rem 1.5rem;
}

.table__cell--header {
  font-weight: 500;
}

.preview-table__empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5rem 0; /* py-20 */
  color: var(--color-on-surface-variant);
  opacity: 0.4;
}

.preview-table__empty-icon {
  font-size: 2.25rem; /* text-4xl */
  margin-bottom: 0.5rem;
}

.preview-table__empty-text {
  margin: 0;
}


tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   UTILITIES
   ========================================================================== */
.u-hidden {
  display: none !important;
}

.u-animate-spin {
  animation: spin 1s linear infinite;
}