/* CSS Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Color Variables - Sketch Notebook Aesthetic */
:root {
  /* Light mode - black and white focus */
  --background: oklch(0.98 0.003 106); /* Off-white paper */
  --foreground: oklch(0.15 0.01 264); /* Near black ink */
  --card: oklch(0.99 0.002 106); /* Bright white */
  --card-foreground: oklch(0.15 0.01 264);
  --primary: oklch(0.2 0.02 264); /* Deep black */
  --primary-foreground: oklch(0.98 0.003 106);
  --secondary: oklch(0.88 0.008 106); /* Light gray sketch */
  --secondary-foreground: oklch(0.2 0.02 264);
  --muted: oklch(0.92 0.005 106); /* Subtle gray */
  --muted-foreground: oklch(0.45 0.015 264);
  --accent: oklch(0.85 0.01 106); /* Accent gray */
  --accent-foreground: oklch(0.2 0.02 264);
  --border: oklch(0.3 0.02 264); /* Dark sketch lines */
  --radius: 0.125rem; /* Minimal rounding for sketch feel */
}

[data-theme='advent-mode'] {
  /* Deep warm backdrop, like a dim room */
  --background: oklch(0.18 0.03 50); /* Dark cocoa / espresso */
  --foreground: oklch(0.9 0.03 85); /* Warm parchment */

  --card: oklch(0.23 0.04 55); /* Slightly lighter warm brown */
  --card-foreground: var(--foreground);

  /* Primary: candle flame / soft gold */
  --primary: oklch(0.78 0.12 85); /* Warm golden amber */
  --primary-foreground: oklch(0.16 0.03 50); /* Dark text on gold */

  /* Secondary: deeper amber / brass */
  --secondary: oklch(0.55 0.09 70);
  --secondary-foreground: var(--foreground);

  /* Muted: for subtle surfaces, inputs, etc. */
  --muted: oklch(0.26 0.03 55); /* Muted brown */
  --muted-foreground: oklch(0.75 0.03 85); /* Soft warm text */

  /* Accent: slightly redder ember tone */
  --accent: oklch(0.65 0.1 40); /* Ember / copper */
  --accent-foreground: var(--background);

  /* Borders: soft antique brass line */
  --border: oklch(0.32 0.05 60);

  --radius: 0.375rem;
}

/* Body and Base Typography */
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  background-color: var(--background);
  color: var(--foreground);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Link Styles */
a {
  color: oklch(0.55 0.15 230); /* Ice blue for snow mode */
  text-decoration: underline;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

[data-theme='advent-mode'] a {
  color: oklch(0.78 0.12 85); /* Warm golden amber for candle mode */
}

[data-theme='advent-mode'] a:hover {
  opacity: 0.9;
}

/* Main Container */
main.container {
  min-height: 100vh;
  padding: 2rem 1rem;
}

.calendar-wrapper {
  max-width: 72rem;
  margin: 0 auto;
}

/* Title Section */
.title-section {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.main-title {
  font-size: 4rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--foreground);
  position: relative;
  display: inline-block;
}

.title-text {
  position: relative;
  display: inline-block;
}

.title-underline {
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 100%;
  height: 0.75rem;
  color: var(--foreground);
}

.subtitle {
  font-size: 1.875rem;
  margin-top: 2rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--muted-foreground);
}

/* Advent Grid */
.advent-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .advent-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
  }

  .main-title {
    font-size: 6rem;
  }

  .subtitle {
    font-size: 2.25rem;
  }
}

/* Advent Box Styling */
.advent-box {
  aspect-ratio: 1;
  position: relative;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
  transition: all 0.2s ease;
}

.advent-box:nth-child(1) {
  transform: rotate(-1deg);
}
.advent-box:nth-child(2) {
  transform: rotate(0.5deg);
}
.advent-box:nth-child(3) {
  transform: rotate(-0.5deg);
}
.advent-box:nth-child(4) {
  transform: rotate(1deg);
}
.advent-box:nth-child(5) {
  transform: rotate(-1.5deg);
}
.advent-box:nth-child(6) {
  transform: rotate(0.5deg);
}
.advent-box:nth-child(7) {
  transform: rotate(1deg);
}
.advent-box:nth-child(8) {
  transform: rotate(-0.5deg);
}
.advent-box:nth-child(9) {
  transform: rotate(0deg);
}
.advent-box:nth-child(10) {
  transform: rotate(1.5deg);
}
.advent-box:nth-child(11) {
  transform: rotate(-1deg);
}
.advent-box:nth-child(12) {
  transform: rotate(0.5deg);
}
.advent-box:nth-child(13) {
  transform: rotate(1deg);
}
.advent-box:nth-child(14) {
  transform: rotate(-0.5deg);
}
.advent-box:nth-child(15) {
  transform: rotate(0deg);
}
.advent-box:nth-child(16) {
  transform: rotate(1deg);
}
.advent-box:nth-child(17) {
  transform: rotate(-1.5deg);
}
.advent-box:nth-child(18) {
  transform: rotate(0.5deg);
}
.advent-box:nth-child(19) {
  transform: rotate(1deg);
}
.advent-box:nth-child(20) {
  transform: rotate(-0.5deg);
}
.advent-box:nth-child(21) {
  transform: rotate(0deg);
}
.advent-box:nth-child(22) {
  transform: rotate(1.5deg);
}
.advent-box:nth-child(23) {
  transform: rotate(-1deg);
}
.advent-box:nth-child(24) {
  transform: rotate(0.5deg);
}

.advent-box:hover:nth-child(1) {
  transform: rotate(-1deg) scale(1.05);
}
.advent-box:hover:nth-child(2) {
  transform: rotate(0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(3) {
  transform: rotate(-0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(4) {
  transform: rotate(1deg) scale(1.05);
}
.advent-box:hover:nth-child(5) {
  transform: rotate(-1.5deg) scale(1.05);
}
.advent-box:hover:nth-child(6) {
  transform: rotate(0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(7) {
  transform: rotate(1deg) scale(1.05);
}
.advent-box:hover:nth-child(8) {
  transform: rotate(-0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(9) {
  transform: rotate(0deg) scale(1.05);
}
.advent-box:hover:nth-child(10) {
  transform: rotate(1.5deg) scale(1.05);
}
.advent-box:hover:nth-child(11) {
  transform: rotate(-1deg) scale(1.05);
}
.advent-box:hover:nth-child(12) {
  transform: rotate(0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(13) {
  transform: rotate(1deg) scale(1.05);
}
.advent-box:hover:nth-child(14) {
  transform: rotate(-0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(15) {
  transform: rotate(0deg) scale(1.05);
}
.advent-box:hover:nth-child(16) {
  transform: rotate(1deg) scale(1.05);
}
.advent-box:hover:nth-child(17) {
  transform: rotate(-1.5deg) scale(1.05);
}
.advent-box:hover:nth-child(18) {
  transform: rotate(0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(19) {
  transform: rotate(1deg) scale(1.05);
}
.advent-box:hover:nth-child(20) {
  transform: rotate(-0.5deg) scale(1.05);
}
.advent-box:hover:nth-child(21) {
  transform: rotate(0deg) scale(1.05);
}
.advent-box:hover:nth-child(22) {
  transform: rotate(1.5deg) scale(1.05);
}
.advent-box:hover:nth-child(23) {
  transform: rotate(-1deg) scale(1.05);
}
.advent-box:hover:nth-child(24) {
  transform: rotate(0.5deg) scale(1.05);
}

/* Sketchy border SVG */
.box-border {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  color: var(--foreground);
  transition: all 0.3s ease;
}

.advent-box:hover .box-border {
  color: var(--primary);
}

/* Day Number */
.day-number {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--foreground);
  letter-spacing: -0.025em;
  transition: all 0.3s ease;
  font-variant-numeric: oldstyle-nums;
}

@media (min-width: 768px) {
  .day-number {
    font-size: 2.5rem;
  }
}

.advent-box:hover .day-number {
  color: var(--primary);
}

/* Corner Marks */
.corner-mark {
  position: absolute;
  width: 0.5rem;
  height: 0.5rem;
  opacity: 0.4;
}

.corner-top-left {
  top: 0.25rem;
  left: 0.25rem;
  border-left: 2px solid var(--foreground);
  border-top: 2px solid var(--foreground);
}

.corner-bottom-right {
  bottom: 0.25rem;
  right: 0.25rem;
  border-right: 2px solid var(--foreground);
  border-bottom: 2px solid var(--foreground);
}

/* Footer Note */
.footer-note {
  text-align: center;
  margin-top: 3rem;
  font-size: 0.875rem;
  color: var(--muted-foreground);
  font-style: italic;
}

/* Modal Styles */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background-color: var(--background);
  opacity: 0.8;
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  background-color: var(--card);
  max-width: 28rem;
  width: 100%;
  padding: 2rem;
  z-index: 10;
}

.modal-border {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  color: var(--foreground);
}

.modal-inner {
  position: relative;
  z-index: 10;
}

/* Close Button */
.close-button {
  position: absolute;
  top: -1rem;
  right: -1rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--foreground);
  transition: color 0.2s ease;
}

.close-button:hover {
  color: var(--primary);
}

.close-button svg {
  color: inherit;
}

/* Modal Body */
.modal-body {
  text-align: center;
}

.modal-header {
  margin-bottom: 1.5rem;
}

.modal-day-number {
  font-size: 4rem;
  font-weight: 700;
  color: var(--foreground);
  letter-spacing: -0.025em;
}

.modal-divider {
  height: 1px;
  background-color: var(--foreground);
  opacity: 0.2;
  width: 6rem;
  margin: 0.5rem auto;
}

.modal-month {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted-foreground);
}

.modal-text {
  padding: 1rem 0;
}

.modal-main-text {
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--foreground);
  opacity: 0.8;
  margin-bottom: 1rem;
}

.modal-sub-text {
  font-size: 0.875rem;
  color: var(--muted-foreground);
  line-height: 1.5;
}

.sticker {
  max-width: 100%;
  max-height: 200px;
  width: auto;
  height: auto;
  object-fit: contain;
  margin: 1rem auto;
  display: block;
}

/* Opened State Styles (for reference) */
.advent-box.opened {
  opacity: 0.6;
}

.advent-box.opened .box-border {
  stroke-width: 1.5;
  color: var(--muted);
}

.advent-box.opened .day-number {
  display: none;
}

.advent-box.opened .corner-mark {
  display: none;
}

/* Sticker displayed in opened box */
.box-sticker {
  position: absolute;
  inset: 10%;
  width: 80%;
  height: 80%;
  object-fit: contain;
  z-index: 2;
  pointer-events: none;
}

/* Locked State Styles */
.advent-box.locked {
  cursor: not-allowed;
  pointer-events: auto; /* Keep clickable for the alert */
  background-color: var(--muted); /* Grey fill for locked boxes */
  opacity: 1;
}

.advent-box.locked .day-number {
  color: var(--muted-foreground);
  opacity: 0.7;
}

.advent-box.locked .corner-mark {
  opacity: 0.3;
}

/* Lock Icon */
.lock-icon {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--foreground);
  opacity: 0.6;
  z-index: 5;
  pointer-events: none;
}

/* Disable hover effects for locked boxes */
.advent-box.locked:hover {
  transform: none !important; /* Keeps the original rotation, no scale */
}

.advent-box.locked:hover .box-border {
  color: var(--muted); /* No color change on hover */
}

.advent-box.locked:hover .day-number {
  color: var(--muted-foreground); /* No color change on hover */
}

/* Optional: Add a shake animation when clicking locked boxes */
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

.advent-box.locked:active {
  animation: shake 0.3s ease-in-out;
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background: var(--card);
  border: 2px solid var(--border);
  color: var(--foreground);
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 100;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 2px 2px 0 var(--border);
}

.theme-toggle:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--border);
  background: var(--accent);
  color: var(--accent-foreground);
}

.theme-toggle:active {
  transform: translate(0, 0);
  box-shadow: 1px 1px 0 var(--border);
}

/* Theme toggle icon */
.theme-icon {
  width: 1.25rem;
  height: 1.25rem;
  transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-icon {
  transform: rotate(15deg) scale(1.1);
}

@media (max-width: 768px) {
  .theme-toggle {
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }
}