/* Auslage — Design */
:root {
  --ink: #10241f;
  --ink-soft: #3a534c;
  --foam: #f3faf6;
  --mist: #d7efe4;
  --teal: #0f6b5c;
  --teal-deep: #0a4a40;
  --lime: #c8f06c;
  --lime-hot: #b6e24a;
  --coral: #ff6b4a;
  --warn: #c45c26;
  --line: rgba(16, 36, 31, 0.12);
  --shadow: 0 18px 50px rgba(10, 40, 34, 0.14);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --font-brand: "Syne", sans-serif;
  --font-body: "Figtree", sans-serif;
  --bg-page: #e8f5ef;
  --surface: rgba(255, 255, 255, 0.68);
  --surface-solid: #f7fcf9;
  --surface-panel: rgba(255, 255, 255, 0.72);
  --topbar-bg: rgba(243, 250, 246, 0.75);
  --btn-primary-bg: linear-gradient(135deg, var(--teal) 0%, var(--teal-deep) 100%);
  --btn-primary-color: #f7fff8;
  --btn-primary-shadow: 0 8px 20px rgba(15, 107, 92, 0.28);
  --btn-secondary-bg: var(--lime);
  --btn-secondary-color: var(--ink);
  --btn-secondary-hover: var(--lime-hot);
  --focus-ring: rgba(15, 107, 92, 0.35);
  --hero-amount: linear-gradient(120deg, var(--teal-deep), var(--teal) 40%, #1f8f4e);
  --pill-bg: rgba(15, 107, 92, 0.1);
  --pill-color: var(--teal-deep);
  --chip-on-bg: rgba(15, 107, 92, 0.14);
  --chip-on-border: rgba(15, 107, 92, 0.35);
  --nav-active-bg: rgba(15, 107, 92, 0.12);
  --nav-active-border: rgba(15, 107, 92, 0.25);
  --toast-bg: var(--ink);
  --toast-color: #f4fff8;
  --toast-ok: var(--teal-deep);
  --toast-err: #6d2430;
  --status-pending-bg: rgba(180, 120, 20, 0.14);
  --status-pending-color: #8a5a00;
  --status-paid-bg: rgba(15, 107, 92, 0.14);
  --status-paid-color: var(--teal-deep);
  --danger-border: rgba(255, 107, 74, 0.45);
  --danger-color: var(--coral);
  --modal-backdrop: rgba(8, 28, 24, 0.45);
  --link: var(--teal-deep);
  --hover-lift: translateY(-2px);
  --hover-shadow: 0 10px 28px rgba(10, 40, 34, 0.1);
  --ambient-opacity: 1;
  --ambient-anim: drift 18s ease-in-out infinite alternate;
  --btn-radius: var(--radius-pill);
  --card-radius: var(--radius);
  --field-radius: 12px;
  --letter-brand: -0.04em;
  --letter-heading: -0.03em;
  --letter-amount: -0.05em;
}

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

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg-page);
}

body {
  position: relative;
  overflow-x: hidden;
}

.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: var(--ambient-opacity);
  pointer-events: none;
  background:
    radial-gradient(1200px 700px at 10% -10%, #9fe7c8 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 0%, #ffe1a8 0%, transparent 50%),
    radial-gradient(800px 500px at 70% 100%, #7fd0c0 0%, transparent 55%),
    linear-gradient(165deg, #eef8f2 0%, #d9efe6 45%, #eaf3ff 100%);
  animation: var(--ambient-anim);
}

@keyframes drift {
  from { filter: hue-rotate(0deg) saturate(1); transform: scale(1); }
  to { filter: hue-rotate(12deg) saturate(1.08); transform: scale(1.03); }
}

a { color: var(--link); }

.brand-mark,
.brand-link {
  font-family: var(--font-brand);
  font-weight: 800;
  letter-spacing: var(--letter-brand);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 0.95;
  margin: 0;
  color: var(--ink);
  text-decoration: none;
}

.brand-link { font-size: 1.55rem; }

h1, h2 {
  font-family: var(--font-brand);
  letter-spacing: var(--letter-heading);
  margin: 0 0 0.35rem;
}

h1 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
h2 { font-size: 1.25rem; }

.lede, .hint, .meta {
  color: var(--ink-soft);
  margin: 0;
}

.hint, .meta { font-size: 0.9rem; }

.topbar-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  justify-content: flex-end;
}

.share-topbar {
  margin-bottom: 0;
}

/* Auth */
.auth-shell {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  padding: clamp(1.25rem, 4vw, 3rem);
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}

.auth-hero h1 { max-width: 14ch; }
.auth-hero .lede { margin-top: 1rem; max-width: 34ch; font-size: 1.1rem; }

.auth-panel {
  background: var(--surface-panel);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line);
  border-radius: calc(var(--card-radius) + 6px);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  animation: rise 0.55s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

/* App chrome */
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  justify-content: space-between;
  align-items: center;
  padding: 1rem clamp(1rem, 3vw, 2rem);
  border-bottom: 1px solid var(--line);
  background: var(--topbar-bg);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-brand { display: flex; align-items: baseline; gap: 0.75rem; }
.topbar-user { color: var(--ink-soft); font-weight: 600; }
.topbar-nav { display: flex; flex-wrap: wrap; gap: 0.35rem; }

.app-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem);
}

.panel { display: none; animation: rise 0.4s ease both; }
.panel.is-active { display: block; }

.panel-intro { margin-bottom: 1.25rem; }
.row-between { display: flex; justify-content: space-between; gap: 1rem; align-items: center; flex-wrap: wrap; }

.hero-balance {
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.25rem;
}

.hero-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink-soft);
  margin: 0 0 0.35rem;
}

.hero-amount {
  font-family: var(--font-brand);
  font-size: clamp(2.6rem, 8vw, 4.5rem);
  font-weight: 800;
  letter-spacing: var(--letter-amount);
  margin: 0;
  line-height: 0.95;
  background: var(--hero-amount);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.action-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0 1.5rem; }

/* Lists */
.balance-list,
.expense-list,
.people-list,
.claims-list {
  display: grid;
  gap: 0.75rem;
}

.balance-row,
.expense-card,
.person-row,
.claim-row {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: 1rem 1.1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.balance-row:hover,
.expense-card:hover,
.person-row:hover {
  transform: var(--hover-lift);
  box-shadow: var(--hover-shadow);
}

.balance-row strong,
.person-row strong { font-size: 1.05rem; }
.amount-em { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

.expense-card { flex-direction: column; }
.expense-top { display: flex; justify-content: space-between; gap: 1rem; width: 100%; align-items: flex-start; }
.expense-meta { display: flex; flex-wrap: wrap; gap: 0.5rem 0.85rem; color: var(--ink-soft); font-size: 0.92rem; }
.share-pills { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.65rem; }
.pill {
  background: var(--pill-bg);
  color: var(--pill-color);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.receipt-thumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.receipt-thumbs a,
.receipt-thumbs button.thumb {
  display: block;
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--line);
  padding: 0;
  background: #fff;
  cursor: pointer;
  position: relative;
}

.receipt-thumbs img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.thumb-del {
  position: absolute;
  top: 2px;
  right: 2px;
  border: 0;
  background: rgba(16, 36, 31, 0.75);
  color: #fff;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
}

.empty {
  padding: 1.5rem;
  border: 1px dashed var(--line);
  border-radius: var(--card-radius);
  color: var(--ink-soft);
  text-align: center;
}

/* Buttons / forms */
.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: var(--btn-radius);
  padding: 0.65rem 1.15rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.btn:active { transform: translateY(1px) scale(0.99); }

.btn-block { width: 100%; }
.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-color);
  box-shadow: var(--btn-primary-shadow);
}
.btn-primary:hover { filter: brightness(1.05); }

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

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost.is-active,
.topbar-nav .btn-ghost.is-active {
  background: var(--nav-active-bg);
  border-color: var(--nav-active-border);
}

.btn-danger {
  background: transparent;
  border-color: var(--danger-border);
  color: var(--danger-color);
}

.stack { display: grid; gap: 0.9rem; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.field { display: grid; gap: 0.35rem; font-weight: 600; font-size: 0.92rem; }
.field input,
.field textarea,
.field select {
  font: inherit;
  font-weight: 500;
  border: 1px solid var(--line);
  border-radius: var(--field-radius);
  padding: 0.7rem 0.85rem;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--focus-ring);
  border-color: var(--teal);
}

.check-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.92rem;
}

.is-hidden { display: none !important; }
.spacer { flex: 1; }

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.modal[hidden] { display: none !important; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: var(--modal-backdrop);
  backdrop-filter: blur(3px);
  animation: fade 0.2s ease;
}

@keyframes fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-dialog {
  position: relative;
  width: min(560px, 100%);
  max-height: min(92dvh, 900px);
  overflow: auto;
  background: var(--surface-solid);
  border-radius: calc(var(--card-radius) + 4px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.2rem 1.25rem;
  animation: pop 0.28s cubic-bezier(.2,.8,.2,1);
}

.modal-wide { width: min(720px, 100%); }

.modal-receipt {
  width: min(920px, 100%);
  padding-bottom: 1rem;
}

.receipt-preview {
  display: grid;
  place-items: center;
  min-height: 200px;
  max-height: min(75dvh, 820px);
  overflow: auto;
  background: rgba(0, 0, 0, 0.04);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  cursor: zoom-out;
}

.receipt-preview img {
  max-width: 100%;
  max-height: min(72dvh, 780px);
  height: auto;
  width: auto;
  display: block;
  cursor: default;
}

@keyframes pop {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to { opacity: 1; transform: none; }
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.icon-btn {
  border: 0;
  background: transparent;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  color: var(--ink-soft);
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.35rem;
}

.split-box,
.receipt-box,
.share-pay {
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: 0.9rem;
  background: rgba(255, 255, 255, 0.55);
  display: grid;
  gap: 0.75rem;
}

.chip-wrap { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.chip {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius-pill);
  padding: 0.35rem 0.75rem;
  font-weight: 600;
  cursor: pointer;
}
.chip.is-on {
  background: var(--chip-on-bg);
  border-color: var(--chip-on-border);
  color: var(--pill-color);
}

.inline-add {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.share-rows { display: grid; gap: 0.45rem; }
.share-row {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 0.5rem;
  align-items: center;
}

.share-row input {
  font: inherit;
  border: 1px solid var(--line);
  border-radius: var(--field-radius);
  padding: 0.55rem 0.7rem;
}

/* Toasts */
.toast-root {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 80;
  display: grid;
  gap: 0.5rem;
  width: min(360px, calc(100vw - 2rem));
}

.toast {
  background: var(--toast-bg);
  color: var(--toast-color);
  padding: 0.85rem 1rem;
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
  animation: rise 0.25s ease;
  font-weight: 600;
}

.toast.error { background: var(--toast-err); }
.toast.success { background: var(--toast-ok); }

/* Share public */
.share-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.share-head { margin-bottom: 1rem; }
.share-items { display: grid; gap: 0.65rem; margin-bottom: 1.25rem; }
.share-item {
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: 0.85rem 0.95rem;
  background: rgba(255, 255, 255, 0.55);
  display: grid;
  gap: 0.55rem;
}

.share-item-main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}
.share-item-amount { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }
.share-receipts { margin-top: 0.15rem; }

.share-shell .share-pay { margin-bottom: 1.15rem; }

.share-balance .meta { margin-top: 0.25rem; }
.pay-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.pay-info-row strong {
  display: block;
  word-break: break-all;
  font-family: var(--font-body);
  letter-spacing: 0.02em;
}
.share-history {
  margin-top: 1.25rem;
  display: grid;
  gap: 0.65rem;
}
.claim-history-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line);
}
.status-pill {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.status-pill.status-pending {
  background: var(--status-pending-bg);
  color: var(--status-pending-color);
}
.status-pill.status-paid {
  background: var(--status-paid-bg);
  color: var(--status-paid-color);
}

/* Responsive */
@media (max-width: 860px) {
  .auth-shell { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .topbar-nav { width: 100%; }
  .topbar-tools { width: 100%; justify-content: flex-start; }
  .share-row { grid-template-columns: 1fr; }
  .inline-add { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}