/* ============================================
   GLOBAL RESETS & UTILITIES
   ============================================ */

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

* {
  margin: 0;
  padding: 0;
  font: inherit;
}

html {
  hanging-punctuation: first last;
}

/* Media responsive */
img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  text-wrap: balance;
}

p {
  max-width: 75ch;
  text-wrap: pretty;
}

@media (prefers-reduced-motion: no-preference) {
  :has(:target) {
    scroll-behavior: smooth;
    scroll-padding-top: 3rem;
  }
}

/* ============================================
   CSS VARIABLES
   ============================================ */

:root {
  --color-bg: #f1f0f5;
  --color-surface: #ffffff;
  --color-border: #e5e5e5;
  --color-border-strong: rgba(0, 0, 0, 0.18);
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #6b6b6b;
  --color-text-muted: #a0a0a0;

  /* Priority colors */
  --color-high: #ff5642;
  --color-high-bg: #ffeeed;
  --color-medium: #ff963d;
  --color-medium-bg: #fff3eb;
  --color-low: #00c164;
  --color-low-bg: #e4fbf2;

  /* Status colors */
  --color-pending: #6b6b6b;
  --color-pending-bg: #f5f5f5;
  --color-inprogress: #008eff;
  --color-inprogress-bg: #e1f4ff;
  --color-done: var(--color-low);
  --color-done-bg: var(--color-low-bg);

  --color-accent: var(--color-inprogress);
  --color-overdue: var(--color-high);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --font-body: 'Geist', sans-serif;

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.06);
}

/* ============================================
   BODY & HTML
   ============================================ */

body {
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

/* ============================================
   ARTICLE: TODO CARD
   ============================================ */

.todo-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  width: 100%;
  max-width: 480px;
}

/* ============================================
   HEADER: CARD-HEADER & BADGES
   ============================================ */

.card-header {
  display: flex;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.badge-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
}

.badge-high {
  background: var(--color-high-bg);
  color: var(--color-high);
  border-color: rgba(192, 57, 43, 0.2);
}

.badge-medium {
  background: var(--color-medium-bg);
  color: var(--color-medium);
  border-color: rgba(212, 136, 6, 0.2);
}

.badge-low {
  background: var(--color-low-bg);
  color: var(--color-low);
  border-color: rgba(46, 125, 50, 0.2);
}

.badge-pending {
  background: var(--color-pending-bg);
  color: var(--color-pending);
  border-color: rgba(107, 107, 107, 0.2);
}

.badge-inprogress {
  background: var(--color-inprogress-bg);
  color: var(--color-inprogress);
  border-color: rgba(21, 101, 192, 0.2);
}

.badge-done {
  background: var(--color-done-bg);
  color: var(--color-done);
  border-color: rgba(46, 125, 50, 0.2);
}

/* ============================================
   CARD BODY & TASK STRUCTURE
   ============================================ */

.card-body {
  display: flex;
  gap: 8px;
}

.checkbox-wrapper {
  padding-top: 3px;
  flex-shrink: 0;
}

#todo-complete {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

#todo-complete:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.task-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

/* ============================================
   TASK CONTENT: TITLE & DESCRIPTION
   ============================================ */

.todo-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
  transition: color 0.2s, text-decoration 0.2s;
}

.todo-title.is-done {
  text-decoration: line-through;
  color: var(--color-text-muted);
}

.todo-description {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ============================================
   META BLOCK: DUE DATE & TIME REMAINING
   ============================================ */

.meta-block {
  margin-top: 0.5rem;
  margin-bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
}

.meta-label {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.meta-value {
  color: var(--color-text-primary);
  font-weight: 500;
  font-family: var(--font-body);
  font-size: 0.8125rem;
}

.meta-value.is-overdue {
  color: var(--color-overdue);
}

.meta-value.is-soon {
  color: #b45309;
}

/* ============================================
   TAGS
   ============================================ */

.tags-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 1.25rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--color-text-secondary);
  border: 2px solid var(--color-border);
}

/* ============================================
   FOOTER: CARD ACTIONS & BUTTONS
   ============================================ */

.card-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  background: transparent;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background: #f5f4f1;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-delete {
  color: var(--color-overdue);
  border-color: rgba(192, 57, 43, 0.25);
}

.btn-delete:hover {
  background: var(--color-high-bg);
}

/* ============================================
   RESPONSIVE MEDIA QUERIES
   ============================================ */

@media (max-width: 480px) {
  body {
    padding: 1rem 0.75rem;
    align-items: flex-start;
  }

  .todo-card {
    padding: 1.25rem;
  }
}