/* -------------------------------------------------------------
 * CORE DESIGN SYSTEM (Linear-Inspired Theme)
 * ------------------------------------------------------------- */

:root {
  /* Colors - Default Dark Theme */
  --color-canvas: #010102;
  --color-surface-1: #0f1011;
  --color-surface-2: #141516;
  --color-surface-3: #18191a;
  --color-surface-4: #191a1b;
  
  --color-hairline: #23252a;
  --color-hairline-strong: #34343a;
  
  --color-primary: #5e6ad2;
  --color-primary-hover: #828fff;
  --color-primary-focus: rgba(94, 106, 210, 0.5);
  
  --color-ink: #f7f8f8;
  --color-ink-muted: #d0d6e0;
  --color-ink-subtle: #8a8f98;
  --color-ink-tertiary: #62666d;
  
  --color-success: #27a644;
  --color-success-bg: rgba(39, 166, 68, 0.1);
  --color-error: #e5484d;
  --color-error-bg: rgba(229, 72, 77, 0.1);
  
  /* Spacing */
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  
  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* Light Theme Variables Overrides */
body.light-theme {
  --color-canvas: #f8f9fa;
  --color-surface-1: #ffffff;
  --color-surface-2: #f1f3f5;
  --color-surface-3: #e9ecef;
  --color-surface-4: #dee2e6;
  
  --color-hairline: #e2e4e9;
  --color-hairline-strong: #ced4da;
  
  --color-primary: #5e6ad2;
  --color-primary-hover: #4b58c5;
  --color-primary-focus: rgba(94, 106, 210, 0.25);
  
  --color-ink: #0f1011;
  --color-ink-muted: #212529;
  --color-ink-subtle: #495057;
  --color-ink-tertiary: #868e96;
}

/* -------------------------------------------------------------
 * RESET & BASE RULES
 * ------------------------------------------------------------- */

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

body {
  background-color: var(--color-canvas);
  color: var(--color-ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-canvas);
}
::-webkit-scrollbar-thumb {
  background: var(--color-surface-2);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-surface-3);
}

/* -------------------------------------------------------------
 * LAYOUT CONTAINERS
 * ------------------------------------------------------------- */

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-nav {
  position: sticky;
  top: 0;
  height: 56px;
  background-color: rgba(1, 1, 2, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--space-lg);
  z-index: 100;
  transition: background-color var(--transition-normal);
}

body.light-theme .top-nav {
  background-color: rgba(248, 249, 250, 0.85);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.brand-logo {
  width: 24px;
  height: 24px;
}

.brand-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--color-ink);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 12px;
  color: var(--color-ink-subtle);
  background: var(--color-surface-1);
  padding: 4px var(--space-sm);
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-hairline);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-ink-tertiary);
}

.status-dot.online {
  background-color: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
}

.status-dot.offline {
  background-color: #f59e0b;
}

.icon-btn {
  background-color: var(--color-surface-1);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  color: var(--color-ink-muted);
  cursor: pointer;
  padding: 6px 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background-color: var(--color-surface-2);
  color: var(--color-ink);
  border-color: var(--color-hairline-strong);
}

.main-content {
  flex: 1;
  max-width: 850px;
  width: 100%;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* -------------------------------------------------------------
 * PANELS & CARDS (Collapsible)
 * ------------------------------------------------------------- */

.panel {
  background-color: var(--color-surface-1);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  position: relative;
  overflow: hidden;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-hairline);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-xs);
  user-select: none;
}

.panel-header.clickable {
  cursor: pointer;
}

.panel-header.clickable:hover .panel-title {
  color: var(--color-ink);
}

.panel-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  transition: color var(--transition-fast);
}

.collapse-toggle-btn {
  color: var(--color-ink-subtle);
  font-size: 12px;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
}

.collapse-toggle-btn:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-3);
}

/* -------------------------------------------------------------
 * QUICK LOG INPUT SECTION
 * ------------------------------------------------------------- */

.quick-log-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.quick-log-textarea-wrapper {
  position: relative;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.quick-log-textarea-wrapper:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-focus);
}

.quick-log-textarea {
  width: 100%;
  min-height: 90px;
  padding: var(--space-md) var(--space-md) 40px var(--space-md);
  font-size: 15px;
  line-height: 1.6;
  resize: vertical;
  background: transparent;
  border: none;
}

.quick-log-meta {
  position: absolute;
  bottom: var(--space-sm);
  left: var(--space-md);
  right: var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Geist Mono', 'Courier New', Courier, monospace;
  font-size: 11px;
  color: var(--color-ink-tertiary);
  pointer-events: none;
}

.symbol-selector-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: var(--space-xs) 0;
}

.symbol-btn {
  background-color: var(--color-surface-1);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  color: var(--color-ink-muted);
  cursor: pointer;
  padding: 6px 10px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.symbol-btn:hover {
  background-color: var(--color-surface-2);
  border-color: var(--color-hairline-strong);
  color: var(--color-ink);
}

.symbol-btn.active {
  background-color: var(--color-surface-3);
  border-color: var(--color-primary);
  color: var(--color-primary-hover);
  font-weight: 600;
}

.symbol-icon {
  font-weight: bold;
  font-size: 14px;
}

.log-submit-btn {
  background-color: var(--color-primary);
  color: #ffffff;
  font-weight: 500;
  border-radius: var(--radius-md);
  padding: 10px var(--space-lg);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
}

.log-submit-btn:hover {
  background-color: var(--color-primary-hover);
}

/* -------------------------------------------------------------
 * FEED & ENTRIES LIST
 * ------------------------------------------------------------- */

.feed-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xs);
}

.feed-empty {
  text-align: center;
  padding: var(--space-xxl) var(--space-lg);
  color: var(--color-ink-subtle);
  border: 1px dashed var(--color-hairline);
  border-radius: var(--radius-lg);
}

.entry-card {
  background-color: var(--color-surface-1);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  transition: background-color var(--transition-fast);
}

.entry-card:hover {
  background-color: var(--color-surface-2);
}

.entry-type-indicator {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  color: var(--color-primary-hover);
  font-weight: bold;
  flex-shrink: 0;
}

.entry-content-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

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

.entry-id {
  font-family: 'Geist Mono', 'Courier New', Courier, monospace;
  font-size: 11px;
  color: var(--color-ink-tertiary);
}

.entry-text {
  font-size: 14.5px;
  color: var(--color-ink-muted);
  white-space: pre-wrap;
}

.entry-actions {
  display: flex;
  gap: var(--space-xs);
}

.entry-action-btn {
  color: var(--color-ink-tertiary);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.entry-action-btn:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-3);
}

.entry-action-btn.delete:hover {
  color: var(--color-error);
  background-color: var(--color-error-bg);
}

/* -------------------------------------------------------------
 * PLANNING SECTION (Tabs)
 * ------------------------------------------------------------- */

.tabs-header {
  display: flex;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  padding: 3px;
  margin-bottom: var(--space-md);
  width: fit-content;
}

.tab-btn {
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  color: var(--color-ink-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--color-ink);
}

.tab-btn.active {
  background-color: var(--color-surface-4);
  color: var(--color-ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.planning-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.planning-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
}

/* Custom Checkbox Design */
.checkbox-container {
  display: block;
  position: relative;
  padding-left: 24px;
  cursor: pointer;
  font-size: 14.5px;
  user-select: none;
  color: var(--color-ink-muted);
  width: 100%;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 2px;
  left: 0;
  height: 16px;
  width: 16px;
  background-color: transparent;
  border: 1.5px solid var(--color-hairline-strong);
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.checkbox-container:hover input ~ .checkmark {
  border-color: var(--color-primary-hover);
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-container .checkmark:after {
  left: 4.5px;
  top: 1.5px;
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 1.5px 1.5px 0;
  transform: rotate(45deg);
}

.checkbox-container input:checked ~ .item-text {
  text-decoration: line-through;
  color: var(--color-ink-tertiary);
}

.planning-add-form {
  display: flex;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.planning-input {
  flex: 1;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: 8px var(--space-md);
  font-size: 14px;
  transition: border-color var(--transition-fast);
}

.planning-input:focus {
  border-color: var(--color-primary);
}

.planning-add-btn {
  background-color: var(--color-surface-3);
  border: 1px solid var(--color-hairline);
  color: var(--color-ink-muted);
  border-radius: var(--radius-md);
  padding: 8px var(--space-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.planning-add-btn:hover {
  background-color: var(--color-surface-4);
  color: var(--color-ink);
  border-color: var(--color-hairline-strong);
}

/* -------------------------------------------------------------
 * REVISION WEEKLY PANEL
 * ------------------------------------------------------------- */

.weekly-review-banner {
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

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

.weekly-review-actions {
  display: flex;
  gap: var(--space-xs);
}

.btn-small {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-3);
  border: 1px solid var(--color-hairline);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-small:hover {
  background-color: var(--color-surface-4);
  color: var(--color-ink);
}

.btn-small.primary {
  background-color: var(--color-primary);
  color: white;
  border: none;
}

.btn-small.primary:hover {
  background-color: var(--color-primary-hover);
}

.weekly-item-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px var(--space-xs);
  border-bottom: 1px solid var(--color-hairline);
}

.weekly-item-text {
  font-size: 13.5px;
  color: var(--color-ink-muted);
}

.weekly-item-controls {
  display: flex;
  gap: var(--space-xxs);
}

/* -------------------------------------------------------------
 * SETTINGS MODAL (ENGRENAGEM)
 * ------------------------------------------------------------- */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--space-md);
  animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-container {
  background-color: var(--color-surface-1);
  border: 1px solid var(--color-hairline-strong);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg);
  animation: slideUp var(--transition-fast);
}

@keyframes slideUp {
  from { transform: translateY(15px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--color-hairline);
  padding-bottom: var(--space-sm);
}

.modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.modal-close-btn {
  font-size: 16px;
  color: var(--color-ink-subtle);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  transition: all var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-2);
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-hairline);
}

.setting-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.setting-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
}

.setting-desc {
  font-size: 12px;
  color: var(--color-ink-subtle);
}

.setting-action {
  display: flex;
  gap: var(--space-xs);
}

/* Theme Selector Radio Pills */
.theme-selector-group {
  display: flex;
  background-color: var(--color-surface-2);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  padding: 3px;
}

.theme-option-btn {
  padding: 6px 14px;
  font-size: 12.5px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  color: var(--color-ink-subtle);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.theme-option-btn:hover {
  color: var(--color-ink);
}

.theme-option-btn.active {
  background-color: var(--color-surface-4);
  color: var(--color-ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* -------------------------------------------------------------
 * FOOTER
 * ------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--color-hairline);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  font-size: 12px;
  color: var(--color-ink-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-xs);
}

.footer-link {
  transition: color var(--transition-fast);
}

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