:root {
    --primary: #0e7490;
    --primary-dark: #0c5a72;
    --accent: #f97316;
    --bg: #f4f8f9;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --danger: #dc2626;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    padding-bottom: 76px;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--primary);
    color: white;
    padding: 14px 16px;
    padding-top: calc(14px + env(safe-area-inset-top));
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-title { font-weight: 700; font-size: 1.1rem; }
.current-member { font-size: 0.85rem; opacity: 0.9; display: flex; align-items: center; gap: 6px; }

.avatar {
    border-radius: 50%;
    object-fit: cover;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}

main { padding: 16px; max-width: 720px; margin: 0 auto; }

.view { display: none; }
.view.active { display: block; }

h1 { font-size: 1.3rem; margin: 4px 0 12px; text-transform: capitalize; }
h2 { font-size: 1rem; margin: 20px 0 8px; color: var(--primary-dark); }
h3 { font-size: 1rem; margin: 24px 0 8px; }

.card {
    background: var(--card);
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    border: 2px solid var(--primary);
}

.card h3 { margin-top: 0; }
.muted { color: var(--muted); font-size: 0.88rem; }

.next-hotel {
    margin-top: 10px;
    padding: 10px 14px;
    background: #fff7ed;
    border-radius: 10px;
    font-size: 0.9rem;
}
.next-hotel .label { display: block; font-size: 0.75rem; color: var(--muted); text-transform: uppercase; }

.btn-maps {
    display: inline-block;
    margin-top: 10px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
}
.btn-maps.small { padding: 6px 10px; font-size: 0.8rem; }

.btn-secondary {
    display: inline-block;
    margin-top: 10px;
    background: #eef2f5;
    color: var(--text);
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
}
.btn-secondary.small { padding: 6px 10px; font-size: 0.8rem; margin-top: 6px; }

.couple-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 10px;
}
@media (max-width: 480px) {
    .couple-columns { grid-template-columns: 1fr; }
}
.couple-block {
    background: #f8fafb;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px;
}
.couple-block .badge { margin: 2px 0; }
.couple-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 0 0 4px;
}

.note-card {
    background: var(--card);
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 10px;
    border: 1px solid var(--border);
    position: relative;
}
.note-card-head { display: flex; gap: 8px; align-items: baseline; margin-bottom: 4px; }
.note-time { background: var(--primary); color: white; font-size: 0.75rem; padding: 2px 8px; border-radius: 20px; }
.note-author {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--muted);
}

.timeline { position: relative; padding-left: 4px; }
.timeline-item {
    display: flex;
    gap: 12px;
    background: var(--card);
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 12px;
    border: 1px solid var(--border);
}
.timeline-item.current { border: 2px solid var(--accent); background: #fff8f2; }
.timeline-icon { font-size: 1.5rem; }
.timeline-body { flex: 1; }
.timeline-body p { margin: 4px 0; }
.timeline-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }

.badge {
    display: inline-block;
    background: #ecfeff;
    color: var(--primary-dark);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    margin: 4px 0;
}

.day-select {
    width: 100%;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    margin-bottom: 14px;
    font-size: 1rem;
}

.form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 24px; }
.form label { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--muted); gap: 4px; }
.form input, .form select, .form textarea {
    font-size: 1rem;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-family: inherit;
    color: var(--text);
}

.form-subheading {
    font-weight: 700;
    color: var(--primary-dark);
    margin: 10px 0 -2px;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    margin-top: 6px;
}
.btn-primary:active { background: var(--primary-dark); }

.form-actions { display: flex; gap: 10px; }
.form-actions .btn-primary, .form-actions .btn-secondary { flex: 1; text-align: center; }
.form-actions .btn-secondary { border: none; cursor: pointer; font-size: 1rem; }
.hidden { display: none !important; }

.timeline-edit-actions { display: flex; gap: 8px; margin-top: 6px; }
.btn-edit, .btn-remove {
    border: none;
    background: #eef2f5;
    color: var(--text);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
}
.btn-remove { color: var(--danger); }

.btn-delete {
    position: absolute;
    top: 8px;
    right: 8px;
    background: none;
    border: none;
    color: var(--muted);
    font-size: 1rem;
    cursor: pointer;
    padding: 4px 8px;
}
.btn-delete:hover { color: var(--danger); }

.expense-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 8px;
    position: relative;
}
.expense-amount { font-weight: 700; color: var(--primary-dark); }
.expenses-total { font-size: 1.1rem; font-weight: 700; margin-bottom: 14px; }

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    background: white;
    border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom);
    z-index: 10;
}
.nav-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 10px 0 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: 1.2rem;
    color: var(--muted);
}
.nav-btn span { font-size: 0.65rem; }
.nav-btn.active { color: var(--primary); }

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(14, 116, 144, 0.95);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.overlay.hidden { display: none; }
.overlay-card {
    background: white;
    border-radius: 16px;
    padding: 28px 24px;
    max-width: 360px;
    width: 100%;
    text-align: center;
}
.member-list { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }
.member-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 10px;
    border: 2px solid var(--primary);
    background: white;
    color: var(--primary-dark);
    font-size: 1rem;
    font-weight: 600;
}
.member-btn:active { background: var(--primary); color: white; }

.password-error {
    color: var(--danger);
    font-size: 0.85rem;
    min-height: 1.2em;
    margin-top: 10px;
}

@media (min-width: 700px) {
    main { padding: 24px 32px; }
    .bottom-nav { max-width: 720px; left: 50%; transform: translateX(-50%); border-radius: 16px 16px 0 0; box-shadow: 0 -2px 10px rgba(0,0,0,0.08); }
}