:root {
  --bg: #0d0b0a;
  --surface: #151310;
  --surface-2: #1a1713;
  --text: #eee9df;
  --muted: #8a847b;
  --gold: #c9a45c;
  --gold-light: #d8b66e;
  --border: rgba(201, 164, 92, 0.2);
  --input-bg: #0d0b0a;
  --error: #ff8d8d;
  --success: #79d39b;
  --shadow: rgba(0, 0, 0, 0.2);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

img {
  max-width: 100%;
  display: block;
}

.checkout-page {
  min-height: 100vh;
  padding: 26px 20px 50px;
}

.checkout-shell {
  width: min(1120px, 100%);
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 0.96rem;
  margin-bottom: 16px;
  opacity: 0.9;
}

.back-link span {
  font-size: 1.1rem;
  color: var(--gold);
}

.page-title {
  margin: 0;
  font-size: clamp(2.8rem, 4vw, 4rem);
  line-height: 0.95;
  font-weight: 700;
  letter-spacing: -0.04em;
  font-family: "Inter", sans-serif;
}

.page-subtitle {
  margin: 12px 0 26px;
  color: var(--muted);
  font-size: 0.94rem;
}

.page-subtitle a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(330px, 1fr);
  gap: 30px;
  align-items: start;
}

.panel {
  background: rgba(21, 19, 16, 0.94);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0 0 18px;
}

.left-panel {
  padding: 0 20px 20px;
}

.summary-panel {
  padding: 0 20px 18px;
}

.left-panel h2,
.summary-panel h2 {
  margin: 0;
  padding: 18px 0 18px;
  font-size: clamp(1.2rem, 2vw, 2rem);
  font-weight: 700;
  color: var(--text);
}

#checkoutForm {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-group label {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
}

.field-group label span {
  color: var(--gold-light);
}

.field-group input,
.field-group select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  padding: 0 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field-group input::placeholder {
  color: var(--muted);
}

.field-group input:focus,
.field-group select:focus {
  border-color: var(--gold);
  box-shadow: inset 0 0 0 1px rgba(201, 164, 92, 0.12);
}

.field-group.has-error input,
.field-group.has-error select {
  border-color: var(--error);
}

.field-error {
  min-height: 14px;
  color: var(--error);
  font-size: 0.76rem;
  line-height: 1.2;
}

.row-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.summary-list {
  display: grid;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.summary-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  min-height: 64px;
}

.summary-item img {
  width: 56px;
  height: 58px;
  object-fit: cover;
  border: 1px solid rgba(201, 164, 92, 0.2);
  background: rgba(255, 255, 255, 0.02);
}

.summary-item-info {
  min-width: 0;
}

.summary-item-name {
  display: block;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 4px;
  white-space: normal;
  word-break: break-word;
}

.summary-item-size {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
}

.summary-item-price {
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 600;
  white-space: nowrap;
}

.summary-metrics {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding-top: 4px;
}

.summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text);
}

.summary-row span {
  color: var(--muted);
}

.summary-row strong {
  color: var(--text);
  font-weight: 600;
}

.shipping-row strong.free {
  color: var(--success);
}

.coupon-row strong {
  color: var(--text);
}

.hidden {
  display: none;
}

.coupon-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  margin-top: 18px;
  border: 1px solid var(--border);
  background: rgba(13, 11, 10, 0.6);
  min-height: 48px;
}

.coupon-box input {
  background: transparent;
  border: none;
  color: var(--text);
  padding: 0 12px;
  outline: none;
}

.coupon-box input::placeholder {
  color: var(--muted);
}

.coupon-box button {
  border: none;
  background: transparent;
  color: var(--gold-light);
  padding: 0 12px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.coupon-message {
  min-height: 18px;
  margin-top: 8px;
  color: var(--success);
  font-size: 0.76rem;
}

.coupon-message.error {
  color: var(--error);
}

.total-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 1.08rem;
  color: var(--text);
}

.total-row strong {
  color: var(--gold);
  font-size: clamp(1.4rem, 2vw, 2rem);
  font-weight: 700;
}

.payment-block {
  margin-top: 22px;
}

.payment-block h3 {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
}

.payment-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  min-height: 62px;
  margin-bottom: 12px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  background: rgba(18, 16, 14, 0.8);
  cursor: pointer;
}

.payment-option.selected {
  border-color: var(--gold);
  box-shadow: inset 0 0 0 1px rgba(201, 164, 92, 0.12);
}

.payment-option.disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.payment-main {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.payment-main input {
  accent-color: var(--gold);
  width: 16px;
  height: 16px;
  margin: 0;
}

.payment-title {
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
}

.payment-subtitle {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
}

.payment-badges {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.payment-badges span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  min-height: 20px;
  padding: 2px 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--muted);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.place-order-btn {
  width: 100%;
  min-height: 54px;
  border: none;
  background: var(--gold);
  color: #17130f;
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 18px;
  transition: filter 0.2s ease, transform 0.2s ease;
}

.place-order-btn:hover,
.place-order-btn:focus-visible {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.secure-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.78rem;
}

.lock {
  color: var(--gold);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 280px;
  text-align: center;
  padding: 30px 20px;
}

.empty-state h3 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text);
}

.empty-state p {
  margin: 0;
  color: var(--muted);
  max-width: 420px;
  line-height: 1.6;
}

.empty-state .shop-all-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 30px;
  background: var(--gold);
  color: #11100d;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .checkout-layout {
    grid-template-columns: 1fr;
  }

  .summary-panel {
    order: 2;
  }

  .left-panel {
    order: 1;
  }
}

@media (max-width: 700px) {
  .row-3 {
    grid-template-columns: 1fr;
  }

  .summary-item {
    grid-template-columns: 52px minmax(0, 1fr) auto;
  }
}

@media (max-width: 480px) {
  .checkout-page {
    padding-inline: 14px;
  }

  .left-panel,
  .summary-panel {
    padding-left: 14px;
    padding-right: 14px;
  }

  .coupon-box {
    grid-template-columns: 1fr;
  }

  .coupon-box button {
    min-height: 42px;
  }
}


/* ============================================
   CHECKOUT FIREBASE AUTHENTICATION
   ============================================ */
.checkout-auth-banner {
  border: 1px solid var(--border);
  background: radial-gradient(circle at top left, rgba(201, 164, 92, 0.08), transparent 60%), var(--surface);
  padding: 20px;
  margin-bottom: 24px;
  transition: all 0.3s ease;
}

.checkout-auth-banner.not-authenticated {
  border-left: 3px solid var(--gold);
}

.auth-banner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.auth-banner-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.auth-banner-title svg {
  width: 18px;
  height: 18px;
  color: var(--gold);
  flex-shrink: 0;
}

.auth-pill {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  background: rgba(201, 164, 92, 0.15);
  color: var(--gold-light);
  border: 1px solid rgba(201, 164, 92, 0.3);
  padding: 3px 8px;
  border-radius: 999px;
}

.auth-banner-desc {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.auth-banner-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.btn-google-auth {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 18px;
  min-height: 44px;
  background: #ffffff;
  color: #1f1f1f;
  border: 1px solid #dadce0;
  border-radius: 2px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}

.btn-google-auth:hover {
  background: #f8f9fa;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  transform: translateY(-1px);
}

.btn-google-auth svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-email-auth {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  min-height: 44px;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-email-auth:hover {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(201, 164, 92, 0.05);
}

/* User Card (When Signed In) */
.checkout-auth-banner.authenticated {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-left: 3px solid var(--success);
  background: rgba(121, 211, 155, 0.04);
}

.user-badge-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), #705421);
  color: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  border: 1px solid var(--gold-light);
  overflow: hidden;
  flex-shrink: 0;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-signed-in-label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--success);
  font-weight: 700;
}

.user-name-email {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.user-name-email strong {
  font-size: 0.96rem;
  color: var(--text);
}

.user-name-email span {
  font-size: 0.84rem;
  color: var(--muted);
}

.btn-auth-signout {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-auth-signout:hover {
  border-color: var(--error);
  color: var(--error);
}

/* Modal Overlay */
.auth-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.auth-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.auth-modal-card {
  width: min(440px, 100%);
  background: #151310;
  border: 1px solid var(--border);
  padding: 30px 24px;
  position: relative;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
  transform: translateY(16px);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-modal-backdrop.open .auth-modal-card {
  transform: translateY(0);
}

.auth-modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  background: transparent;
  border: none;
  font-size: 26px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.2s;
  padding: 4px;
}

.auth-modal-close:hover {
  color: var(--gold);
}

.auth-modal-title {
  margin: 0 0 6px;
  font-family: "Cormorant Garamond", serif;
  font-size: 2.2rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--text);
}

.auth-modal-sub {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.4;
}

.auth-modal-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.02);
}

.auth-tab-btn {
  background: transparent;
  border: none;
  padding: 12px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 700;
  color: #a9a196;
  cursor: pointer;
  transition: all 0.2s;
}

.auth-tab-btn:hover {
  color: var(--gold-light);
}

.auth-tab-btn.active {
  background: rgba(201, 164, 92, 0.16);
  color: #ffffff;
  border-bottom: 2px solid var(--gold);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.auth-field label {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.auth-field input {
  background: #0d0b0a;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 14px;
  font-size: 0.95rem;
  outline: none;
  font-family: inherit;
}

.auth-field input:focus {
  border-color: var(--gold);
}

.auth-submit-btn {
  width: 100%;
  background: var(--gold);
  color: #111;
  border: none;
  min-height: 46px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 6px;
  transition: filter 0.2s ease;
}

.auth-submit-btn:hover {
  filter: brightness(1.08);
}

.auth-error-msg {
  min-height: 18px;
  color: var(--error);
  font-size: 0.82rem;
  margin-top: 10px;
  line-height: 1.4;
}

.hidden {
  display: none !important;
}

/* ============================================
   DIRECT UPI MODAL & PAYMENT STYLES
   ============================================ */
.upi-modal-card {
  max-width: 440px;
  text-align: center;
}

.upi-qr-wrapper {
  background: #ffffff;
  padding: 16px;
  border-radius: 4px;
  display: inline-block;
  margin: 10px auto 16px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.upi-qr-img {
  width: 190px;
  height: 190px;
  display: block;
  margin: 0 auto;
}

.upi-amount-badge {
  margin-top: 10px;
  font-size: 0.92rem;
  color: #111;
  font-weight: 600;
  padding-top: 8px;
  border-top: 1px dashed rgba(0, 0, 0, 0.15);
}

.upi-amount-badge strong {
  color: #0b0b0a;
  font-size: 1.15rem;
}

.upi-id-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  padding: 12px 14px;
  margin-bottom: 14px;
  text-align: left;
}

.upi-id-label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 4px;
  font-weight: 700;
}

.upi-id-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.upi-id-row code {
  font-family: monospace;
  font-size: 0.95rem;
  color: var(--text);
  word-break: break-all;
}

.upi-copy-btn {
  background: rgba(201, 164, 92, 0.15);
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 4px 10px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.upi-copy-btn:hover {
  background: var(--gold);
  color: #111;
}

.upi-direct-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
  transition: all 0.2s ease;
}

.upi-direct-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.upi-utr-section {
  text-align: left;
  margin-bottom: 14px;
}

.upi-utr-section label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.upi-utr-section input {
  width: 100%;
  background: #0d0b0a;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  font-size: 0.92rem;
  outline: none;
}

.upi-utr-section input:focus {
  border-color: var(--gold);
}

.upi-confirm-btn {
  margin-top: 4px;
}