/* styles.css — Personal Dashboard */

/* =========================================================================
   1. CSS Custom Properties (Light theme defaults)
   ========================================================================= */
:root {
  /* Colors */
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-surface-alt: #f0f0f0;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-accent: #4f6ef7;
  --color-accent-hover: #3a57d4;
  --color-border: #e0e0e0;
  --color-danger: #e53e3e;
  --color-danger-hover: #c53030;
  --color-done: #38a169;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;

  /* Typography */
  --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.75rem;
  --font-size-2xl: 2.5rem;
  --line-height: 1.6;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);
}

/* =========================================================================
   2. Dark Theme Overrides
   ========================================================================= */
[data-theme="dark"] {
  --color-bg: #121212;
  --color-surface: #1e1e1e;
  --color-surface-alt: #2a2a2a;
  --color-text: #e8e8e8;
  --color-text-muted: #999999;
  --color-accent: #6b84f8;
  --color-accent-hover: #8fa0fa;
  --color-border: #333333;
  --color-danger: #fc6868;
  --color-danger-hover: #ff8a8a;
  --color-done: #68d391;
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.5);
}

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

html {
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

ul {
  list-style: none;
}

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

a:hover {
  text-decoration: underline;
}

/* =========================================================================
   4. Header
   ========================================================================= */
header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
}

header h1 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

/* =========================================================================
   5. Main — CSS Grid two-column layout
   ========================================================================= */
main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto auto;
  gap: var(--space-lg);
  padding: var(--space-xl);
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
}

#greeting {
  grid-column: 1 / -1; /* row 1: spans both columns */
}

#timer {
  grid-column: 1;       /* row 2, col 1 */
}

#todo {
  grid-column: 2;       /* row 2, col 2 */
}

#links {
  grid-column: 1;       /* row 3, col 1 */
}

/* =========================================================================
   6. Footer
   ========================================================================= */
footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-xl);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* =========================================================================
   7. Widget Cards (shared)
   ========================================================================= */
main > section {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  text-align: center;
}

main > section > * {
  width: 100%;
}

/* =========================================================================
   8. Greeting Widget
   ========================================================================= */
.greeting-time {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
}

.greeting-date {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
}

.greeting-text {
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--color-accent);
}

/* =========================================================================
   9. Focus Timer Widget
   ========================================================================= */
#timer {
  justify-content: center;
}
.timer-display {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-text);
  text-align: center;
  letter-spacing: 0.05em;
  transition: color 0.3s ease;
}

.timer-display.timer-done {
  color: var(--color-done);
}

.timer-controls {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.timer-controls button {
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

.timer-controls button:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
}

.timer-controls button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* =========================================================================
   10. To-Do List Widget
   ========================================================================= */
.todo-add-form {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.todo-error {
  width: 100%;
  font-size: var(--font-size-sm);
  color: var(--color-danger);
  min-height: 1.2em;
}

.todo-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-alt);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  outline: none;
  transition: border-color 0.2s ease;
}

.todo-input:focus {
  border-color: var(--color-accent);
}

.todo-add-form button {
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

.todo-add-form button:hover {
  background-color: var(--color-accent-hover);
}

.todo-sort-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.todo-sort {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-alt);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  cursor: pointer;
  outline: none;
}

.todo-sort:focus {
  border-color: var(--color-accent);
}

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

.todo-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-alt);
  transition: opacity 0.2s ease;
}

.todo-item.completed {
  opacity: 0.55;
}

.todo-item.completed .todo-text {
  text-decoration: line-through;
  color: var(--color-text-muted);
}

.todo-text {
  flex: 1;
  font-size: var(--font-size-base);
  word-break: break-word;
}

.todo-edit-input {
  flex: 1;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  outline: none;
}

.todo-edit-btn,
.todo-save-btn,
.todo-delete-btn {
  padding: var(--space-xs) var(--space-sm);
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

.todo-edit-btn {
  background-color: var(--color-surface);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.todo-edit-btn:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

.todo-save-btn {
  background-color: var(--color-done);
  color: #ffffff;
}

.todo-save-btn:hover {
  opacity: 0.85;
}

.todo-delete-btn {
  background-color: transparent;
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
}

.todo-delete-btn:hover {
  background-color: var(--color-danger);
  color: #ffffff;
}

/* =========================================================================
   11. Quick Links Widget
   ========================================================================= */
.links-add-form {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.links-label-input,
.links-url-input {
  flex: 1;
  min-width: 0;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-alt);
  color: var(--color-text);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  outline: none;
  transition: border-color 0.2s ease;
}

.links-label-input:focus,
.links-url-input:focus {
  border-color: var(--color-accent);
}

.links-add-form button {
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

.links-add-form button:hover {
  background-color: var(--color-accent-hover);
}

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

.links-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-alt);
}

.links-item a {
  flex: 1;
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-accent);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.links-item a:hover {
  text-decoration: underline;
}

.links-delete-btn {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.links-delete-btn:hover {
  background-color: var(--color-danger);
  color: #ffffff;
}

/* =========================================================================
   12. Theme Toggle Button
   ========================================================================= */
#theme-toggle {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(--font-family);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

#theme-toggle:hover {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

/* =========================================================================
   13. Responsive — single column below 768px
   ========================================================================= */
@media (max-width: 768px) {
  main {
    grid-template-columns: 1fr;
    padding: var(--space-md);
    gap: var(--space-md);
  }

  #greeting,
  #timer,
  #todo,
  #links {
    grid-column: 1;
  }

  header {
    padding: var(--space-md);
  }

  footer {
    padding: var(--space-md);
  }

  .todo-add-form {
    flex-wrap: wrap;
  }

  .links-add-form {
    flex-direction: column;
  }

  .links-label-input,
  .links-url-input {
    width: 100%;
  }

  .timer-controls {
    gap: var(--space-xs);
  }
}