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

/*  Design Tokens  */
:root {
  --font: "Inter", system-ui, -apple-system, sans-serif;

  /* Luxury emerald palette */
  --emerald-50: #ecfdf5;
  --emerald-100: #d1fae5;
  --emerald-200: #a7f3d0;
  --emerald-300: #6ee7b7;
  --emerald-400: #34d399;
  --emerald-500: #10b981;
  --emerald-600: #059669;
  --emerald-700: #047857;
  --emerald-800: #065f46;
  --emerald-900: #064e3b;
  --emerald-950: #022c22;

  /* Backgrounds */
  --bg: #030d08;
  --card-bg: #071210;
  --card-border: #0f3320;
  --card-glow: rgba(16, 185, 129, 0.1);

  /* Inset panel (date/time zone) */
  --panel-bg: #050e09;
  --panel-border: #0d2a18;

  /* Text */
  --txt-primary: #f0fdf4;
  --txt-secondary: #a7f3d0;
  --txt-muted: #4d7a62;

  /* Accent gradient */
  --grad-emerald: linear-gradient(
    135deg,
    #059669 0%,
    #10b981 50%,
    #34d399 100%
  );
  --grad-bar: linear-gradient(
    90deg,
    #047857,
    #10b981,
    #34d399,
    #10b981,
    #047857
  );

  /* Priority (semantic, unchanged) */
  --high-color: #ef4444;
  --high-bg: rgba(239, 68, 68, 0.1);
  --high-border: rgba(239, 68, 68, 0.22);
  --medium-color: #f59e0b;
  --medium-bg: rgba(245, 158, 11, 0.1);
  --medium-border: rgba(245, 158, 11, 0.22);
  --low-color: var(--emerald-400);
  --low-bg: rgba(52, 211, 153, 0.1);
  --low-border: rgba(52, 211, 153, 0.25);

  /* Status */
  --inprogress-color: var(--emerald-400);
  --inprogress-bg: rgba(52, 211, 153, 0.08);
  --inprogress-border: rgba(52, 211, 153, 0.28);
  --done-color: var(--emerald-500);
  --done-bg: rgba(16, 185, 129, 0.08);
  --done-border: rgba(16, 185, 129, 0.28);
  --pending-color: var(--txt-muted);
  --pending-bg: rgba(77, 122, 98, 0.08);
  --pending-border: rgba(77, 122, 98, 0.22);

  /* Time remaining */
  --time-color: var(--emerald-400);
  --time-bg: rgba(52, 211, 153, 0.07);

  /* Tags */
  --tag-bg: rgba(16, 185, 129, 0.06);
  --tag-border: rgba(16, 185, 129, 0.18);
  --tag-color: var(--emerald-300);

  /* Buttons */
  --btn-edit-bg: rgba(16, 185, 129, 0.08);
  --btn-edit-border: rgba(16, 185, 129, 0.22);
  --btn-edit-color: var(--emerald-300);
  --btn-delete-bg: rgba(239, 68, 68, 0.07);
  --btn-delete-border: rgba(239, 68, 68, 0.25);
  --btn-delete-color: #f87171;

  /* Modal */
  --modal-bg: #071210;
  --modal-border: #0f3320;
  --input-bg: #050e09;
  --input-border: #0d2a18;
  --input-focus: rgba(16, 185, 129, 0.45);

  /* Transitions */
  --t-fast: 150ms ease;
  --t-base: 250ms ease;
}

/*  Base  */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  color: var(--txt-primary);
  overflow-x: hidden;
  /* Subtle radial emerald glow behind card */
  background-image: radial-gradient(
    ellipse 60% 40% at 50% 50%,
    rgba(5, 150, 105, 0.08) 0%,
    transparent 70%
  );
}

/*  Page Wrapper  */
.page-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
  max-width: 480px;
}

/*  Page Header  */
.page-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  text-align: center;
}

.page-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--emerald-400);
  margin-bottom: 0.25rem;
}

.page-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--txt-primary);
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 0.8rem;
  color: var(--txt-muted);
  font-weight: 400;
  letter-spacing: 0.01em;
}

/*  Page Footer  */
.page-footer {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--txt-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: rgba(16, 185, 129, 0.04);
}

.footer-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--txt-muted);
  flex-shrink: 0;
}

.footer-link {
  color: var(--emerald-400);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--t-fast);
}

.footer-link:hover {
  color: var(--emerald-300);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/*  Todo Card  */
.todo-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(16, 185, 129, 0.06) inset,
    0 8px 32px rgba(0, 0, 0, 0.55),
    0 0 60px var(--card-glow);
  transition:
    box-shadow var(--t-base),
    border-color var(--t-base),
    transform var(--t-base);
  position: relative;
}

.todo-card:hover {
  border-color: #1a4d30;
  box-shadow:
    0 0 0 1px rgba(16, 185, 129, 0.1) inset,
    0 12px 48px rgba(0, 0, 0, 0.65),
    0 0 80px rgba(16, 185, 129, 0.16);
  transform: translateY(-2px);
}

/* Accent bar — thin emerald shimmer across the top */
.card-accent-bar {
  height: 3px;
  width: 100%;
  background: var(--grad-bar);
  background-size: 200% 100%;
  animation: shimmer 4s ease infinite;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Card inner padding */
.card-inner {
  padding: 1.35rem 1.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/*  Row 1: Header (badges + checkbox)  */
.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.badges-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

/*  Badges  */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.625rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  border: 1px solid transparent;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Pulsing status dot */
.status-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--inprogress-color);
  animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

/* Priority badges */
.badge-priority {
  border-radius: 6px;
}

.badge-high {
  color: var(--high-color);
  background: var(--high-bg);
  border-color: var(--high-border);
}
.badge-high .badge-dot {
  background: var(--high-color);
  box-shadow: 0 0 4px var(--high-color);
}

.badge-medium {
  color: var(--medium-color);
  background: var(--medium-bg);
  border-color: var(--medium-border);
}
.badge-medium .badge-dot {
  background: var(--medium-color);
}

.badge-low {
  color: var(--low-color);
  background: var(--low-bg);
  border-color: var(--low-border);
}
.badge-low .badge-dot {
  background: var(--low-color);
}

/* Status badges */
.badge-in-progress {
  color: var(--inprogress-color);
  background: var(--inprogress-bg);
  border-color: var(--inprogress-border);
}

.badge-done {
  color: var(--done-color);
  background: var(--done-bg);
  border-color: var(--done-border);
}

.badge-pending {
  color: var(--pending-color);
  background: var(--pending-bg);
  border-color: var(--pending-border);
}

/*  Checkbox (top-right)  */
.checkbox-wrapper {
  position: relative;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
}

.todo-checkbox {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
  margin: 0;
}

.checkbox-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  border: 2px solid #1a4d30;
  background: rgba(16, 185, 129, 0.04);
  cursor: pointer;
  transition:
    background var(--t-fast),
    border-color var(--t-fast),
    box-shadow var(--t-fast);
  position: relative;
  z-index: 1;
}

.checkmark-icon {
  width: 11px;
  height: 11px;
  color: #fff;
  opacity: 0;
  transform: scale(0.5) rotate(-10deg);
  transition:
    opacity var(--t-fast),
    transform var(--t-fast);
}

.todo-checkbox:focus-visible + .checkbox-label {
  outline: 2px solid var(--emerald-400);
  outline-offset: 2px;
  border-color: var(--emerald-400);
}

.todo-checkbox:checked + .checkbox-label {
  background: var(--grad-emerald);
  border-color: transparent;
  box-shadow: 0 0 14px rgba(16, 185, 129, 0.35);
}

.todo-checkbox:checked + .checkbox-label .checkmark-icon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

/*  Task Title  */
.task-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--txt-primary);
  line-height: 1.4;
  word-break: break-word;
  letter-spacing: -0.01em;
  transition: color var(--t-base);
}

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

/*  Description  */
.task-description {
  font-size: 0.875rem;
  color: var(--txt-secondary);
  line-height: 1.7;
  word-break: break-word;
  overflow-wrap: break-word;
}

/*  Divider  */
.card-divider {
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    #0f3320 30%,
    #0f3320 70%,
    transparent
  );
  margin: 0 -0.2rem;
}

/*  Meta Panel (date + time)  */
.meta-panel {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  overflow: hidden;
}

.meta-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.275rem;
  padding: 0.7rem 1rem;
}

.meta-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--txt-muted);
}

.meta-divider {
  width: 1px;
  background: var(--panel-border);
  flex-shrink: 0;
}

.due-date {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--txt-secondary);
  font-weight: 500;
}

.time-remaining-wrapper {
  display: flex;
}

.time-remaining {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--time-color);
  text-shadow: 0 0 12px rgba(52, 211, 153, 0.4);
}

.time-remaining.overdue {
  color: #f87171;
  text-shadow: 0 0 10px rgba(248, 113, 113, 0.4);
}

.time-remaining.due-soon {
  color: #fbbf24;
  text-shadow: 0 0 10px rgba(251, 191, 36, 0.35);
}

.time-remaining.due-now {
  color: #fcd34d;
  text-shadow: 0 0 12px rgba(252, 211, 77, 0.4);
  animation: now-pulse 1.5s ease-in-out infinite;
}

@keyframes now-pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/*  Tags  */
.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.65rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--tag-color);
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  white-space: nowrap;
  cursor: default;
  font-family: "SF Mono", "Fira Code", monospace, var(--font);
  letter-spacing: 0.01em;
  transition:
    background var(--t-fast),
    border-color var(--t-fast),
    transform var(--t-fast);
}

.tag:hover {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

/*  Action Buttons  */
.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.1rem;
}

.action-btn {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1rem;
  border-radius: 9px;
  font-family: var(--font);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background var(--t-fast),
    border-color var(--t-fast),
    transform var(--t-fast),
    box-shadow var(--t-fast);
  border: 1px solid transparent;
}

.action-btn:focus-visible {
  outline: 2px solid var(--emerald-400);
  outline-offset: 2px;
}

.action-btn:active {
  transform: scale(0.97);
}

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

.btn-edit:hover {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.38);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.15);
}

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

.btn-delete:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.4);
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.12);
}

/*  Modal Overlay  */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 8, 4, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 100;
}

.modal-overlay[hidden] {
  display: none;
}

/*  Modal  */
.modal {
  background: var(--modal-bg);
  border: 1px solid var(--modal-border);
  border-radius: 14px;
  width: 100%;
  max-width: 460px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(16, 185, 129, 0.06) inset,
    0 24px 64px rgba(0, 0, 0, 0.7),
    0 0 60px rgba(16, 185, 129, 0.08);
  animation: modal-in 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Accent bar on modal top */
.modal::before {
  content: "";
  display: block;
  height: 3px;
  background: var(--grad-bar);
  background-size: 200% 100%;
  animation: shimmer 4s ease infinite;
  flex-shrink: 0;
}

.modal-sm {
  max-width: 400px;
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.4rem;
  border-bottom: 1px solid var(--modal-border);
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-icon {
  font-size: 1rem;
}
.modal-icon-danger {
  filter: hue-rotate(0deg);
}

.modal-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--txt-primary);
  letter-spacing: -0.01em;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 7px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--txt-muted);
  cursor: pointer;
  transition:
    background var(--t-fast),
    color var(--t-fast),
    border-color var(--t-fast);
}

.modal-close:hover {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--panel-border);
  color: var(--emerald-300);
}

.modal-close:focus-visible {
  outline: 2px solid var(--emerald-400);
  outline-offset: 2px;
}

.modal-body {
  padding: 1.25rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--txt-muted);
  text-transform: uppercase;
}

.form-input,
.form-textarea,
.form-select {
  font-family: var(--font);
  font-size: 0.875rem;
  color: var(--txt-primary);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  width: 100%;
  transition:
    border-color var(--t-fast),
    box-shadow var(--t-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--txt-muted);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--emerald-600);
  box-shadow: 0 0 0 3px var(--input-focus);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-select option {
  background: #071210;
  color: var(--txt-primary);
}

.delete-message {
  font-size: 0.875rem;
  color: var(--txt-secondary);
  line-height: 1.65;
}

.delete-message strong {
  color: var(--txt-primary);
  font-weight: 600;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.9rem 1.4rem;
  border-top: 1px solid var(--modal-border);
}

.modal-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
  transition:
    background var(--t-fast),
    border-color var(--t-fast),
    box-shadow var(--t-fast);
  border: 1px solid transparent;
}

.modal-btn:focus-visible {
  outline: 2px solid var(--emerald-400);
  outline-offset: 2px;
}

.modal-btn-cancel {
  background: rgba(16, 185, 129, 0.05);
  border-color: var(--panel-border);
  color: var(--txt-secondary);
}

.modal-btn-cancel:hover {
  background: rgba(16, 185, 129, 0.1);
  border-color: #1a4d30;
}

.modal-btn-save {
  background: var(--grad-emerald);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.25);
}

.modal-btn-save:hover {
  box-shadow: 0 0 28px rgba(16, 185, 129, 0.4);
  filter: brightness(1.08);
}

.modal-btn-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.35);
  color: #f87171;
}

.modal-btn-danger:hover {
  background: rgba(239, 68, 68, 0.18);
  border-color: rgba(239, 68, 68, 0.55);
}

/*  Focus Visible global  */
:focus-visible {
  outline: 2px solid var(--emerald-400);
  outline-offset: 2px;
}

/*  Responsive  */
@media (max-width: 520px) {
  body {
    align-items: flex-start;
    justify-content: flex-start;
    padding: 1.25rem 1rem;
  }

  .page-wrapper,
  .todo-card {
    max-width: 100%;
  }

  .card-inner {
    padding: 1.1rem 1.15rem 1.25rem;
  }

  .meta-panel {
    flex-direction: column;
  }

  .meta-divider {
    width: auto;
    height: 1px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 360px) {
  .badges-row {
    flex-wrap: wrap;
    row-gap: 0.3rem;
  }
}

/*  Print  */
@media print {
  body {
    background: white;
    color: black;
  }
  .todo-card {
    border: 1px solid #ccc;
    background: white;
    box-shadow: none;
  }
  .card-actions,
  .card-accent-bar,
  .modal-overlay {
    display: none;
  }
}

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