/* css/style.css — To-Do List Life Dashboard styles */

/* ==========================================================================
   2.1 CSS Custom Properties — Light and Dark Themes
   ========================================================================== */

:root {
  /* Background */
  --bg-gradient-start: #6a11cb;
  --bg-gradient-end: #2575fc;

  /* Card */
  --card-bg: #ffffff;
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  --card-border: rgba(255, 255, 255, 0.3);

  /* Text */
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #7a7a9a;
  --text-on-accent: #ffffff;

  /* Inputs */
  --input-bg: #f4f4f8;
  --input-border: #d0d0e0;
  --input-border-focus: #6a11cb;
  --input-text: #1a1a2e;
  --input-placeholder: #9a9ab0;

  /* Buttons — primary */
  --btn-primary-bg: #6a11cb;
  --btn-primary-bg-hover: #5a0db0;
  --btn-primary-text: #ffffff;

  /* Buttons — secondary */
  --btn-secondary-bg: #f0f0f8;
  --btn-secondary-bg-hover: #e0e0f0;
  --btn-secondary-text: #4a4a6a;
  --btn-secondary-border: #d0d0e0;

  /* Buttons — danger */
  --btn-danger-bg: #fff0f0;
  --btn-danger-bg-hover: #ffe0e0;
  --btn-danger-text: #c0392b;
  --btn-danger-border: #f5c6c6;

  /* Disabled state */
  --btn-disabled-bg: #e8e8f0;
  --btn-disabled-text: #b0b0c8;
  --btn-disabled-border: #d8d8e8;

  /* Timer display */
  --timer-color: #6a11cb;

  /* Task items */
  --task-item-bg: #f8f8fc;
  --task-item-border: #e8e8f0;
  --task-completed-text: #a0a0b8;

  /* Link buttons */
  --link-btn-bg: #f0eeff;
  --link-btn-bg-hover: #e0dcff;
  --link-btn-text: #4a2db0;
  --link-btn-border: #c8c0f0;

  /* Error */
  --error-text: #c0392b;
  --error-bg: #fff5f5;
  --error-border: #f5c6c6;

  /* Warning banner */
  --warning-bg: #fff8e1;
  --warning-text: #7a5800;
  --warning-border: #ffe082;

  /* Theme toggle */
  --toggle-bg: rgba(255, 255, 255, 0.2);
  --toggle-bg-hover: rgba(255, 255, 255, 0.35);
  --toggle-text: #ffffff;
  --toggle-border: rgba(255, 255, 255, 0.4);

  /* Borders & dividers */
  --divider: #e8e8f0;

  /* Scrollbar */
  --scrollbar-thumb: #c8c8e0;
  --scrollbar-track: #f0f0f8;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
}

/* Dark theme overrides */
[data-theme="dark"] {
  /* Background */
  --bg-gradient-start: #0f0c29;
  --bg-gradient-end: #302b63;

  /* Card */
  --card-bg: #1e1e2e;
  --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  --card-border: rgba(255, 255, 255, 0.08);

  /* Text */
  --text-primary: #e8e8f8;
  --text-secondary: #a8a8c8;
  --text-muted: #6868a0;
  --text-on-accent: #ffffff;

  /* Inputs */
  --input-bg: #2a2a3e;
  --input-border: #3a3a5a;
  --input-border-focus: #9a6aff;
  --input-text: #e8e8f8;
  --input-placeholder: #5a5a80;

  /* Buttons — primary */
  --btn-primary-bg: #7c3aed;
  --btn-primary-bg-hover: #6d28d9;
  --btn-primary-text: #ffffff;

  /* Buttons — secondary */
  --btn-secondary-bg: #2a2a3e;
  --btn-secondary-bg-hover: #3a3a52;
  --btn-secondary-text: #a8a8c8;
  --btn-secondary-border: #3a3a5a;

  /* Buttons — danger */
  --btn-danger-bg: #2e1a1a;
  --btn-danger-bg-hover: #3e2020;
  --btn-danger-text: #f87171;
  --btn-danger-border: #5a2a2a;

  /* Disabled state */
  --btn-disabled-bg: #252535;
  --btn-disabled-text: #4a4a68;
  --btn-disabled-border: #303048;

  /* Timer display */
  --timer-color: #a78bfa;

  /* Task items */
  --task-item-bg: #252535;
  --task-item-border: #3a3a52;
  --task-completed-text: #4a4a68;

  /* Link buttons */
  --link-btn-bg: #2a2040;
  --link-btn-bg-hover: #352850;
  --link-btn-text: #c4b5fd;
  --link-btn-border: #4a3a70;

  /* Error */
  --error-text: #f87171;
  --error-bg: #2e1a1a;
  --error-border: #5a2a2a;

  /* Warning banner */
  --warning-bg: #2e2800;
  --warning-text: #ffd54f;
  --warning-border: #5a4800;

  /* Borders & dividers */
  --divider: #3a3a52;

  /* Scrollbar */
  --scrollbar-thumb: #4a4a68;
  --scrollbar-track: #252535;
}

/* ==========================================================================
   2.9 Typography — Base Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  /* 2.2 Purple/blue gradient background */
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  background-attachment: fixed;
  min-height: 100vh;

  /* Typography */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text-primary);

  /* Smooth theme transitions */
  transition: background var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 600;
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
}

/* Screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Custom scrollbar (Webkit) */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-pill);
}

/* ==========================================================================
   2.8 Theme Toggle Button
   ========================================================================== */

#theme-toggle {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  z-index: 1000;

  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;

  background: var(--toggle-bg);
  color: var(--toggle-text);
  border: 1px solid var(--toggle-border);
  border-radius: var(--radius-pill);
  font-size: 1.25rem;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);

  transition: background var(--transition-fast), transform var(--transition-fast);
}

#theme-toggle:hover {
  background: var(--toggle-bg-hover);
  transform: scale(1.08);
}

#theme-toggle:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

/* ==========================================================================
   2.10 Storage Warning Banner
   ========================================================================== */

#storage-warning {
  position: sticky;
  top: 0;
  z-index: 900;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);

  background: var(--warning-bg);
  color: var(--warning-text);
  border-bottom: 1px solid var(--warning-border);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
}

#storage-warning[hidden] {
  display: none;
}

#storage-warning-dismiss {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-left: var(--space-sm);

  background: transparent;
  color: var(--warning-text);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  cursor: pointer;
  flex-shrink: 0;

  transition: background var(--transition-fast);
}

#storage-warning-dismiss:hover {
  background: var(--warning-border);
}

/* ==========================================================================
   2.2 Card Base Styles
   ========================================================================== */

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.card__title {
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

/* ==========================================================================
   2.3 Responsive Card Grid Layout
   ========================================================================== */

.dashboard {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  padding: var(--space-xl) var(--space-md);
  padding-top: calc(var(--space-xl) + 44px + var(--space-md)); /* account for fixed toggle */
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* Tablet: 2 columns */
@media (min-width: 640px) {
  .dashboard {
    grid-template-columns: repeat(2, 1fr);
    padding: var(--space-xl) var(--space-lg);
    padding-top: calc(var(--space-xl) + 44px + var(--space-md));
  }
}

/* Desktop: 2 columns, wider spacing */
@media (min-width: 1024px) {
  .dashboard {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    padding: var(--space-xl) var(--space-xl);
    padding-top: calc(var(--space-xl) + 44px + var(--space-md));
  }
}

/* Wide desktop: 4 columns */
@media (min-width: 1400px) {
  .dashboard {
    grid-template-columns: repeat(4, 1fr);
    padding: var(--space-xl) var(--space-xl);
    padding-top: calc(var(--space-xl) + 44px + var(--space-md));
  }
}

/* ==========================================================================
   Shared Input and Button Base Styles
   ========================================================================== */

input[type="text"],
input[type="url"] {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  background: var(--input-bg);
  color: var(--input-text);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-family: inherit;
  line-height: 1.5;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-width: 0; /* prevent overflow in flex/grid */
}

input[type="text"]::placeholder,
input[type="url"]::placeholder {
  color: var(--input-placeholder);
}

input[type="text"]:focus,
input[type="url"]:focus {
  outline: none;
  border-color: var(--input-border-focus);
  box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.15);
}

[data-theme="dark"] input[type="text"]:focus,
[data-theme="dark"] input[type="url"]:focus {
  box-shadow: 0 0 0 3px rgba(154, 106, 255, 0.2);
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-family: inherit;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), opacity var(--transition-fast),
    transform var(--transition-fast);
}

button:hover:not(:disabled) {
  background: var(--btn-primary-bg-hover);
}

button:focus-visible {
  outline: 2px solid var(--input-border-focus);
  outline-offset: 2px;
}

button:active:not(:disabled) {
  transform: scale(0.97);
}

button:disabled {
  background: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  border-color: var(--btn-disabled-border);
  cursor: not-allowed;
  transform: none;
}

/* Secondary button variant */
.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--btn-secondary-bg-hover);
}

/* Danger button variant */
.btn-danger {
  background: var(--btn-danger-bg);
  color: var(--btn-danger-text);
  border-color: var(--btn-danger-border);
}

.btn-danger:hover:not(:disabled) {
  background: var(--btn-danger-bg-hover);
}

/* ==========================================================================
   Inline Error Messages
   ========================================================================== */

.error-msg {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  background: var(--error-bg);
  color: var(--error-text);
  border: 1px solid var(--error-border);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 500;
}

.error-msg[hidden] {
  display: none;
}

/* ==========================================================================
   2.4 Clock & Greeting Card
   ========================================================================== */

.card--clock {
  text-align: center;
}

#clock-time {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

#clock-date {
  font-size: clamp(0.875rem, 2.5vw, 1rem);
  color: var(--text-secondary);
  font-weight: 400;
  margin-top: var(--space-xs);
}

#greeting-text {
  font-size: clamp(1rem, 3vw, 1.25rem);
  font-weight: 500;
  color: var(--text-primary);
  margin-top: var(--space-xs);
}

.name-row {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.name-row input {
  flex: 1;
}

#name-save-btn {
  flex-shrink: 0;
}

/* ==========================================================================
   2.5 Focus Timer Card
   ========================================================================== */

.card--timer {
  text-align: center;
}

#timer-display {
  font-size: clamp(3rem, 10vw, 5rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--timer-color);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  margin: var(--space-sm) 0;
}

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

.timer-controls button {
  min-width: 80px;
}

/* Start button — primary style (default) */
#timer-start {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
}

#timer-start:hover:not(:disabled) {
  background: var(--btn-primary-bg-hover);
}

/* Stop button — secondary style */
#timer-stop {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
}

#timer-stop:hover:not(:disabled) {
  background: var(--btn-secondary-bg-hover);
}

/* Reset button — secondary style */
#timer-reset {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
}

#timer-reset:hover:not(:disabled) {
  background: var(--btn-secondary-bg-hover);
}

/* ==========================================================================
   2.6 Task Manager Card
   ========================================================================== */

.card--tasks {
  /* Allow the task list to scroll if it grows long */
}

.task-input-row {
  display: flex;
  gap: var(--space-sm);
}

.task-input-row input {
  flex: 1;
}

#task-add-btn {
  flex-shrink: 0;
}

.task-list-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-sm);
}

#task-sort-btn {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
  font-size: 0.8125rem;
  padding: var(--space-xs) var(--space-sm);
}

#task-sort-btn:hover:not(:disabled) {
  background: var(--btn-secondary-bg-hover);
}

/* Task list */
#task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  max-height: 320px;
  overflow-y: auto;
  padding-right: var(--space-xs); /* space for scrollbar */
}

/* Task list item */
#task-list li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-sm);
  background: var(--task-item-bg);
  border: 1px solid var(--task-item-border);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

#task-list li:hover {
  background: var(--btn-secondary-bg-hover);
}

/* Task checkbox */
#task-list input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  cursor: pointer;
  accent-color: var(--btn-primary-bg);
  border-radius: 4px;
}

/* Task text */
.task-text {
  flex: 1;
  font-size: 0.9375rem;
  color: var(--text-primary);
  word-break: break-word;
  min-width: 0;
}

/* Completed task */
.task-text--completed {
  text-decoration: line-through;
  color: var(--task-completed-text);
  opacity: 0.7;
}

/* Task action buttons */
.task-edit-btn,
.task-delete-btn {
  flex-shrink: 0;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.task-edit-btn {
  background: var(--btn-secondary-bg);
  color: var(--btn-secondary-text);
  border-color: var(--btn-secondary-border);
}

.task-edit-btn:hover:not(:disabled) {
  background: var(--btn-secondary-bg-hover);
}

.task-delete-btn {
  background: var(--btn-danger-bg);
  color: var(--btn-danger-text);
  border-color: var(--btn-danger-border);
}

.task-delete-btn:hover:not(:disabled) {
  background: var(--btn-danger-bg-hover);
}

/* Inline edit input within a task item */
.task-edit-input {
  flex: 1;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.9375rem;
  min-width: 0;
}

/* ==========================================================================
   2.7 Quick Links Card
   ========================================================================== */

.link-input-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.link-input-row input {
  flex: 1;
  min-width: 100px;
}

#link-add-btn {
  flex-shrink: 0;
}

/* Links container */
#links-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* Individual link button */
.link-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  background: var(--link-btn-bg);
  color: var(--link-btn-text);
  border: 1px solid var(--link-btn-border);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  max-width: 200px;
  overflow: hidden;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.link-btn:hover:not(:disabled) {
  background: var(--link-btn-bg-hover);
  transform: translateY(-1px);
}

.link-btn:active:not(:disabled) {
  transform: translateY(0);
}

/* Link name text — truncate if too long */
.link-btn__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

/* Remove (×) icon on link button */
.link-btn__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: transparent;
  color: var(--link-btn-text);
  border: none;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
  opacity: 0.6;
  transition: opacity var(--transition-fast), background var(--transition-fast);
  line-height: 1;
}

.link-btn__remove:hover {
  opacity: 1;
  background: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .link-btn__remove:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

/* Small mobile (320px–479px) */
@media (max-width: 479px) {
  .card {
    padding: var(--space-lg) var(--space-md);
  }

  .dashboard {
    padding: var(--space-md);
    padding-top: calc(44px + var(--space-md) * 2);
    gap: var(--space-md);
  }

  #clock-time {
    font-size: 2.5rem;
  }

  #timer-display {
    font-size: 3rem;
  }

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

  .timer-controls button {
    min-width: 68px;
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.875rem;
  }

  .link-input-row {
    flex-direction: column;
  }

  .link-input-row input {
    width: 100%;
  }
}

/* Medium mobile / large mobile (480px–639px) */
@media (min-width: 480px) and (max-width: 639px) {
  .dashboard {
    padding: var(--space-lg) var(--space-md);
    padding-top: calc(44px + var(--space-lg) + var(--space-md));
  }
}

/* Large screens (1920px+) */
@media (min-width: 1920px) {
  .dashboard {
    max-width: 1800px;
    padding: var(--space-xl) calc(var(--space-xl) * 2);
    padding-top: calc(var(--space-xl) + 44px + var(--space-md));
  }

  .card {
    padding: var(--space-xl) calc(var(--space-xl) * 1.5);
  }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}