/* --- CSS Variables for Hand-Drawn Paper Theming --- */
:root {
  --primary-color: #3d5a80; /* Muted Ink Blue */
  --primary-color-dark: #293c5a;
  --secondary-color: #e07a5f; /* Terracotta Accent */
  --background-color: #fdfbf5; /* Off-white paper */
  --surface-color: #ffffff;
  --text-color: #292826; /* Dark Charcoal */
  --text-color-light: #6d6a65;
  --border-color: #dcd9d4;
  --shadow-color: rgba(41, 40, 38, 0.1);
  --shadow-color-hover: rgba(41, 40, 38, 0.2);
  --success-color: #588157;
  --error-color: #c14953;
  --font-family: "Patrick Hand", cursive;
  --font-family-mono: "Special Elite", monospace;
  --header-height: 60px;
  --border-radius: 8px; /* Slightly sharper edges */
  --transition-speed: 0.3s;
}

/* --- Base & Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html,
body {
  min-height: 100%;
  overflow: auto;
}
body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  font-size: 18px;
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
  -webkit-font-smoothing: antialiased;
}

/* --- Layout & Screen Transitions --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 20px;
  background-color: var(--surface-color);
  border-bottom: 2px solid var(--text-color);
  z-index: 1000;
}
header h1 {
  font-size: 2rem;
  font-weight: normal;
  color: var(--primary-color);
}
main {
  padding-top: var(--header-height);
  min-height: 100%;
}
.screen {
  display: none;
  width: 100%;
  padding: 2rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: calc(100vh - var(--header-height));
  height: auto;
}
.screen.active {
  display: flex;
  animation: fadeIn 0.5s ease-in-out;
}
.screen-content {
  width: 100%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  min-height: 100dvh;
  overflow: visible;
}
.hidden {
  display: none !important;
}

/* --- Home Screen Footer --- */
.footer-credit {
  margin-top: auto;
  padding-top: 2rem;
  font-size: 1rem;
  color: var(--text-color-light);
}
.footer-credit i.fa-heart {
  color: var(--secondary-color);
}
.footer-credit a {
  color: var(--text-color);
  text-decoration: none;
  border-bottom: 2px solid var(--border-color);
  transition: all var(--transition-speed) ease;
}
.footer-credit a:hover {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* --- Animations --- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes scaleUp {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.15);
  }
}
@keyframes breathing {
  0% {
    transform: scale(1);
    opacity: 0.9;
  }
  50% {
    transform: scale(1.15);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0.9;
  }
}

/* --- General Components --- */
h2 {
  font-size: 3rem;
  font-weight: normal;
  margin-bottom: 0.5rem;
}
p {
  font-size: 1.2rem;
  color: var(--text-color-light);
  max-width: 500px;
}
.btn {
  padding: 12px 24px;
  font-size: 1.2rem;
  font-family: var(--font-family);
  border: 2px solid var(--text-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--text-color);
}
.btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--text-color);
}
.btn:active {
  transform: translate(4px, 4px);
  box-shadow: 0px 0px 0 var(--text-color);
}
.btn-primary {
  background: var(--primary-color);
  color: white;
}
.btn-pulse {
  animation: pulse 2s infinite ease-in-out;
}
.btn-secondary {
  background-color: var(--surface-color);
  color: var(--primary-color);
}
.icon-btn {
  border: 2px solid var(--text-color);
  color: var(--text-color-light);
  font-size: 1.1rem;
  width: 44px;
  height: 44px;
  box-shadow: none;
  background: transparent;
}
.icon-btn:hover {
  color: var(--primary-color);
  transform: none;
  box-shadow: none;
  background: var(--background-color);
}
input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--text-color);
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  color: var(--text-color);
  font-size: 1.2rem;
  font-family: var(--font-family);
}
input:focus {
  outline: none;
  border-color: var(--primary-color);
}
.button-group {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  max-width: 450px;
}

/* --- Camera Screen --- */
#camera-wrapper {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 9 / 16;
  border: 2px solid var(--text-color);
  border-radius: var(--border-radius);
}
#camera-container {
  width: 100%;
  height: 100%;
  background-color: #000;
  border-radius: var(--border-radius);
  overflow: hidden;
}
#camera-preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.camera-guides {
  position: absolute;
  inset: 10px;
  border: 2px dashed rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius);
}
#capture-btn {
  position: absolute;
  bottom: -28px;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  font-size: 1.5rem;
}

/* --- Analyzing Bill Screen --- */
#progress-container {
  gap: 1rem;
}
#analyzing-emoji {
  font-size: 4rem;
  animation: breathing 2s infinite ease-in-out;
}
#funny-quote {
  font-size: 1.3rem;
  color: var(--text-color);
  min-height: 50px;
  transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
}
#funny-quote.fade-out {
  opacity: 0;
  transform: translateY(-10px);
}

/* --- Bill Review Screen --- */
#bill-review-container {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  border: 2px solid var(--text-color);
  width: 100%;
  max-width: 450px;
  padding: 2rem;
  font-family: var(--font-family-mono);
  text-align: left;
}

/* --- People Screen --- */
#people-screen .screen-content {
  justify-content: flex-start;
  padding-top: 3rem;
}
.people-counter {
  display: flex;
  align-items: center;
  gap: 2rem;
}
#people-count {
  font-size: 5rem;
  font-weight: normal;
  min-width: 80px;
  text-align: center;
  color: var(--primary-color);
}
#people-names-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  width: 100%;
  max-width: 400px;
  margin-bottom: 2rem;
}

/* --- Dishes Screen (Refactored for Robust Layout) --- */
#dishes-screen .screen-content {
  height: 100%;
  justify-content: flex-start;
  gap: 0;
  padding: 1rem;
}
.dishes-top-content {
  padding-bottom: 1rem;
}
.dishes-main-area {
  flex-grow: 1; /* Takes up all available space */
  overflow-y: auto; /* This area scrolls if content overflows */
  width: 100%;
  display: flex;
  justify-content: center; /* Center the card horizontally */
  align-items: center; /* Center the card vertically */
}
.dishes-bottom-controls {
  padding-top: 1rem;
  width: 100%;
  flex-shrink: 0; /* Prevents controls from shrinking */
  position: sticky;
  bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(253, 251, 245, 0),
    var(--background-color) 30%
  );
}
#card-stack {
  position: relative;
  width: 100%;
  max-width: 520px;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.item-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
  background: var(--surface-color);
  border-radius: var(--border-radius);
  border: 2px solid var(--text-color);
  padding: 1.5rem;
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  max-width: 520px;
  max-height: 100vh;
  overflow: visible;
  transition: transform 0.5s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.5s;
  will-change: transform, opacity;
}
.item-card.top {
  transform: scale(1) translateY(0);
  z-index: 10;
  opacity: 1;
}
.item-card.bottom {
  transform: scale(0.95) translateY(20px);
  z-index: 9;
  opacity: 1;
  filter: blur(2px);
}
.item-card.exit {
  transform: translateY(-100px) rotate(-5deg) scale(0.9);
  opacity: 0;
}
.item-info {
  text-align: center;
}
.item-name {
  font-size: 2rem;
}
.item-quantity-cue {
  font-size: 1rem;
  color: var(--text-color-light);
}
.item-price {
  font-size: 2.2rem;
  font-weight: normal;
  color: var(--primary-color);
  margin-top: 0.5rem;
}
.card-actions {
  margin-top: 1.5rem;
  width: 100%;
}
.assign-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(84px, 1fr));
  gap: 0.6rem;
  width: 100%;
  padding: 5px;
}
.split-item-btn {
  margin-top: 1rem;
  background: transparent;
  color: var(--text-color-light);
  border: none;
  box-shadow: none;
}
.split-item-btn:hover {
  color: var(--primary-color);
}
.skip-item-btn {
  color: var(--text-color-light);
  border: 2px dashed var(--border-color);
  box-shadow: none;
}

/* --- Results Screen & Receipt Styles --- */
#receipt-container {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  border: 2px solid var(--text-color);
  width: 100%;
  max-width: 450px;
  padding: 2rem;
  font-family: var(--font-family-mono);
  text-align: left;
}
.receipt-header {
  text-align: center;
  margin-bottom: 2rem;
}
.receipt-header h3 {
  font-size: 1.3rem;
  letter-spacing: 2px;
}
.receipt-person-section {
  margin-bottom: 1.5rem;
  cursor: pointer;
  transition: background-color 0.2s;
  padding: 1rem;
  border-radius: var(--border-radius);
  border: 2px solid var(--border-color);
}
.receipt-person-section:hover {
  background-color: var(--background-color);
  border-color: var(--primary-color);
}
.receipt-person-header {
  display: flex;
  justify-content: space-between;
  font-weight: bold;
  font-size: 1.1rem;
}
.receipt-divider {
  border-top: 2px dashed var(--text-color-light);
  margin: 1.5rem 0;
}
.receipt-total-line {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}
.receipt-grand-total {
  font-weight: bold;
  font-size: 1.2rem;
}
.receipt-skipped-section h4 {
  text-align: center;
  color: var(--text-color-light);
  margin-bottom: 1rem;
  font-size: 1rem;
}
.receipt-skipped-item {
  color: var(--text-color-light);
  text-decoration: line-through;
}

/* --- Modals --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}
.modal-content {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 600px;
  transform: scale(0.95);
  transition: transform 0.3s;
  border: 2px solid var(--text-color);
  box-shadow: 8px 8px 0 var(--text-color);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}
.modal-overlay.show .modal-content {
  transform: scale(1);
}
.modal-content h3 {
  font-family: var(--font-family);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  font-weight: normal;
}
.modal-body {
  overflow-y: auto;
  padding-right: 1rem;
  margin-right: -1rem;
}
.modal-content .btn {
  margin-top: 1.5rem;
}

/* --- Details Modal UI --- */
#modal-items li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-color);
}
#modal-items li span:first-child {
  text-align: left;
  padding-right: 1rem;
  word-break: break-word;
}
#modal-items li span:last-child {
  text-align: right;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.delete-assigned-item-btn {
  width: 36px;
  height: 36px;
  font-size: 0.9rem;
  box-shadow: none;
  background: transparent;
}
.delete-assigned-item-btn:hover {
  background-color: var(--background-color);
}

/* --- How It Works Modal --- */
.how-it-works-steps {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.how-it-works-steps .step {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  text-align: left;
}
.how-it-works-steps .step-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  min-width: 50px;
  text-align: center;
}
.how-it-works-steps .step-text h4 {
  font-family: var(--font-family);
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
  font-weight: normal;
}
.how-it-works-steps .step-text p {
  font-size: 1.1rem;
  color: var(--text-color);
  max-width: none;
}

/* --- Edit Bill Modal --- */
#edit-bill-items-container .edit-item-row {
  display: grid;
  grid-template-columns: 1fr 50px 80px 45px;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}
#edit-bill-items-container .edit-item-row .icon-btn {
  height: 50px;
  width: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#edit-bill-items-container .edit-item-row input {
  font-size: 1rem;
  height: 50px;
  padding: 10px;
}
.edit-summary-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 2px dashed var(--border-color);
}
.edit-summary-container label {
  font-size: 1rem;
  color: var(--text-color-light);
  text-align: left;
}

.input-with-prefix {
  display: grid;
  grid-template-columns: 24px 1fr 64px;
  align-items: center;
  gap: 8px;
}
.input-with-prefix .prefix {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  border: 2px solid var(--text-color);
  border-radius: var(--border-radius);
  background-color: var(--surface-color);
  padding: 0 6px;
}
.input-with-prefix input[type="number"] {
  height: 48px;
}
.input-with-prefix select {
  height: 48px;
  border: 2px solid var(--text-color);
  border-radius: var(--border-radius);
  background-color: var(--surface-color);
  font-family: var(--font-family);
}

.discount-applied-note {
  margin-top: 6px;
  color: var(--text-color-light);
  text-align: right;
}

#split-people-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.split-person-label {
  display: flex;
  align-items: center;
  padding: 1rem;
  background-color: var(--background-color);
  border: 2px solid var(--text-color);
  border-radius: var(--border-radius);
  cursor: pointer;
}
.split-person-label input {
  display: none;
}
.split-person-label .custom-checkbox {
  width: 24px;
  height: 24px;
  border: 2px solid var(--text-color);
  border-radius: 4px;
  margin-right: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.split-person-label input:checked + .custom-checkbox {
  background-color: var(--secondary-color);
}
.split-person-label input:checked + .custom-checkbox::after {
  content: "✔";
  color: var(--surface-color);
  font-size: 16px;
}

/* --- Utility & Responsive Fixes --- */
.message-box {
  border: 2px solid var(--text-color);
  box-shadow: 4px 4px 0 var(--text-color);
  padding: 12px 20px;
  border-radius: var(--border-radius);
  color: white;
  font-family: var(--font-family);
  font-size: 1.1rem;
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translate(-50%, 150%);
  opacity: 0;
  transition: all 0.5s ease-in-out;
  z-index: 2000;
  pointer-events: none;
}
.message-box.show {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}
.message-box.success {
  background-color: var(--success-color);
}
.message-box.error {
  background-color: var(--error-color);
}
#confetti-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 9999;
}
textarea {
  width: 100%;
  font-family: var(--font-family-mono);
  background-color: var(--background-color);
  border: 2px solid var(--text-color);
  padding: 1rem;
  border-radius: var(--border-radius);
  resize: none;
}
/* --- Home Screen (specific) --- */
#camera-screen .screen-content {
  gap: 2.25rem;
}
#scan-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 900px;
  min-height: 100%;
  position: relative;
  padding-bottom: 100px;
}
.home-hero {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: 0.5px;
  max-width: 16ch;
  text-align: center;
}
.home-sub {
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  max-width: 42ch;
  text-align: center;
  color: var(--text-color-light);
}
.home-cta-group {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.home-cta-group .btn {
  width: 100%;
}
.home-bottom-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem 1rem;
  background: linear-gradient(
    to top,
    var(--background-color),
    rgba(253, 251, 245, 0.9) 70%,
    rgba(253, 251, 245, 0)
  );
}
.home-footer {
  margin-top: 0;
  padding-top: 0.25rem;
}

@media (max-width: 480px) {
  #scan-overlay {
    min-height: 100%;
    padding-bottom: 96px;
  }
  .home-hero {
    font-size: clamp(2.4rem, 9vw, 3.6rem);
  }
  .home-cta-group {
    max-width: 100%;
  }
}
@media (max-width: 480px) {
  .button-group {
    flex-direction: column;
  }
  h2 {
    font-size: 2.5rem;
  }
  .people-counter {
    gap: 1rem;
  }
  #people-count {
    font-size: 4rem;
  }
  #edit-bill-items-container .edit-item-row {
    grid-template-columns: 1fr 50px 70px 30px;
  }
}