/* ================================
   CSS Variables & Reset
   ================================ */
:root {
    /* Colors */
    --bg-dark: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --surface: #1e1e2a;
    --surface-light: #2a2a3a;

    --primary: #8b5cf6;
    --primary-glow: rgba(139, 92, 246, 0.3);
    --primary-dark: #7c3aed;

    --accent-green: #10b981;
    --accent-green-glow: rgba(16, 185, 129, 0.2);
    --accent-red: #ef4444;
    --accent-red-glow: rgba(239, 68, 68, 0.15);
    --accent-blue: #3b82f6;
    --accent-amber: #f59e0b;

    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --border: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.12);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px var(--primary-glow);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ================================
   App Container
   ================================ */
.app-container {
    min-height: 100vh;
    position: relative;
}

.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ================================
   Setup Screen
   ================================ */
#setup-screen {
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background:
        radial-gradient(ellipse at top, rgba(139, 92, 246, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom, rgba(59, 130, 246, 0.1), transparent 50%),
        var(--bg-dark);
}

#setup-screen.active {
    display: flex;
}

.setup-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.logo {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.logo-icon {
    font-size: 3.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.setup-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group input {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    color: var(--text-primary);
    transition: var(--transition-base);
    font-family: inherit;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

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

.vs-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) 0;
}

.vs-divider span {
    background: linear-gradient(135deg, var(--primary), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.1em;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    font-family: inherit;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 30px var(--primary-glow);
}

.primary-btn:active {
    transform: translateY(0);
}

.btn-arrow {
    transition: var(--transition-base);
}

.primary-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ================================
   Tracker History (Welcome Screen)
   ================================ */
.history-section {
    margin-top: var(--spacing-md);
}

.tracker-history {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 200px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.history-item:hover {
    background: var(--surface-light);
    border-color: var(--primary);
}

.history-info {
    flex: 1;
    min-width: 0;
}

.history-names {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-code {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    margin-top: 2px;
}

.history-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    font-size: 1.1rem;
    opacity: 0;
}

.history-item:hover .history-delete {
    opacity: 1;
}

.history-delete:hover {
    color: var(--accent-red);
    background: var(--accent-red-glow);
}

/* ================================
   Tracker Screen
   ================================ */
#tracker-screen {
    flex-direction: column;
    min-height: 100vh;
}

#tracker-screen.active {
    display: flex;
}

.tracker-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 1.1rem;
}

.header-btn:hover {
    background: var(--surface-light);
    border-color: var(--border-light);
}

.balance-display {
    text-align: center;
    flex: 1;
    padding: 0 var(--spacing-md);
}

.balance-text {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-base);
}

.balance-text.owes-1 {
    color: var(--accent-red);
}

.balance-text.owes-2 {
    color: var(--accent-red);
}

.balance-text.even {
    color: var(--text-primary);
}

/* ================================
   Split View - ALWAYS SIDE BY SIDE
   ================================ */
.split-view {
    display: flex;
    flex: 1;
    overflow: hidden;
    /* Force side-by-side on all screen sizes */
    flex-direction: row !important;
}

.person-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    overflow-y: auto;
    transition: var(--transition-base);
    /* Ensure minimum width for mobile */
    min-width: 0;
}

.person-column.owes {
    background: rgba(239, 68, 68, 0.25);
    border-left: 4px solid var(--accent-red);
    border-right: 4px solid var(--accent-red);
}

.person-column.owed {
    background: transparent;
}

.person-column.even {
    background: transparent;
}

.person-header {
    text-align: center;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.person-name {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-base);
}

.person-column.owes .person-name {
    color: var(--accent-red);
}

.person-column.owed .person-name {
    color: var(--text-primary);
}

/* Vertical divider - ALWAYS VISIBLE */
.vertical-divider {
    width: 2px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--border);
    flex-shrink: 0;
}

.divider-line {
    flex: 1;
    width: 2px;
    background: linear-gradient(to bottom, var(--border-light), transparent, var(--border-light));
}

/* ================================
   Quick Add Form
   ================================ */
.quick-add {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.amount-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.currency-symbol {
    padding: 0 var(--spacing-sm) 0 var(--spacing-md);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.amount-input {
    flex: 1;
    background: transparent;
    border: none;
    padding: var(--spacing-md) var(--spacing-sm);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: inherit;
    -moz-appearance: textfield;
    min-width: 0;
}

.amount-input::-webkit-outer-spin-button,
.amount-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.amount-input:focus {
    outline: none;
}

.amount-arrows {
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--border);
}

.arrow-btn {
    background: var(--surface);
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.7rem;
    transition: var(--transition-fast);
}

.arrow-btn:hover {
    background: var(--surface-light);
    color: var(--primary);
}

.arrow-btn:first-child {
    border-bottom: 1px solid var(--border);
}

.description-input {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition-base);
}

.description-input:focus {
    outline: none;
    border-color: var(--primary);
}

.description-input::placeholder {
    color: var(--text-muted);
}

.add-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: var(--transition-base);
    font-family: inherit;
}

.add-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.add-btn:active {
    transform: translateY(0);
}

/* ================================
   Entries List
   ================================ */
.entries-list {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.entry-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideIn 0.3s ease;
    transition: var(--transition-base);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.entry-item:hover {
    background: var(--surface-light);
}

.entry-info {
    flex: 1;
    min-width: 0;
}

.entry-description {
    font-size: 0.85rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.entry-date {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.entry-amount {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-left: var(--spacing-sm);
    flex-shrink: 0;
}

.entry-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
    margin-left: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    font-size: 0.9rem;
    opacity: 0;
}

.entry-item:hover .entry-delete {
    opacity: 1;
}

.entry-delete:hover {
    color: var(--accent-red);
    background: var(--accent-red-glow);
}

/* ================================
   Empty State
   ================================ */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ================================
   Homepage Screen
   ================================ */
#welcome-screen {
    padding: var(--spacing-lg);
    background:
        radial-gradient(ellipse at top, rgba(139, 92, 246, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom, rgba(59, 130, 246, 0.1), transparent 50%),
        var(--bg-dark);
    overflow-y: auto;
}

#welcome-screen.active {
    display: block;
}

.homepage-container {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.homepage-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.homepage-header .logo-icon {
    font-size: 3.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

.homepage-header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.homepage-header .tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ================================
   Bookmarks Section
   ================================ */
.bookmarks-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.section-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.icon-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 1rem;
}

.icon-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary);
}

.bookmarks-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 280px;
    overflow-y: auto;
}

.empty-bookmarks {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.empty-bookmarks .empty-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-bookmarks p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.empty-bookmarks .empty-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    opacity: 0.7;
}

/* Bookmark Item */
.bookmark-item {
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.bookmark-item:hover {
    background: var(--surface-light);
    border-color: var(--primary);
    transform: translateX(4px);
}

.bookmark-info {
    flex: 1;
    min-width: 0;
}

.bookmark-names {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bookmark-code {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    margin-top: 2px;
}

.bookmark-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
    font-size: 1.1rem;
    opacity: 0;
}

.bookmark-item:hover .bookmark-delete {
    opacity: 1;
}

.bookmark-delete:hover {
    color: var(--accent-red);
    background: var(--accent-red-glow);
}

/* ================================
   Import Form
   ================================ */
.import-form {
    background: var(--bg-card);
    border: 1px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.import-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.import-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ================================
   Quick Actions
   ================================ */
.quick-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    border: 1px solid var(--border);
    background: var(--bg-card);
    font-family: inherit;
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.action-card.primary-action {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(59, 130, 246, 0.1));
    border-color: var(--primary);
}

.action-card.primary-action:hover {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(59, 130, 246, 0.15));
    box-shadow: var(--shadow-md), 0 0 30px var(--primary-glow);
}

.action-card.secondary-action {
    background: var(--surface);
}

.action-card.secondary-action:hover {
    background: var(--surface-light);
    border-color: var(--border-light);
}

.action-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.action-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.action-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.action-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ================================
   Join Form
   ================================ */
.join-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    animation: slideDown 0.3s ease;
}

.join-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    justify-content: flex-end;
}

/* ================================
   Device Info
   ================================ */
.device-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.8rem;
    opacity: 0.7;
}

.device-icon {
    font-size: 1rem;
}

/* ================================
   Header Actions Group
   ================================ */
.header-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.bookmark-btn span {
    font-size: 1.2rem;
    transition: var(--transition-base);
}

.bookmark-btn.bookmarked span {
    color: var(--accent-amber);
}

.secondary-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-base);
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.secondary-btn:hover {
    background: var(--surface-light);
    border-color: var(--border-light);
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: var(--transition-base);
    font-family: inherit;
}

.text-btn:hover {
    color: var(--text-primary);
}

/* ================================
   Share Modal
   ================================ */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-base);
}

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

.modal-body {
    padding: var(--spacing-lg);
}

.share-instructions {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.share-code-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background: var(--surface);
    border: 2px dashed var(--primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.share-code-display span {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--primary);
}

.share-note {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

.share-link-display {
    display: flex;
    gap: var(--spacing-sm);
}

.share-link-display input {
    flex: 1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: monospace;
    min-width: 0;
}

.copy-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition-base);
}

.copy-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary);
}

.copy-success {
    text-align: center;
    color: var(--accent-green);
    font-size: 0.9rem;
    font-weight: 500;
    padding-top: var(--spacing-md);
    opacity: 0;
    transition: var(--transition-base);
}

.copy-success.show {
    opacity: 1;
}

/* ================================
   Switcher Modal
   ================================ */
.switcher-content {
    max-width: 360px;
}

.switcher-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: var(--spacing-lg);
}

.switcher-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-base);
}

.switcher-item:hover {
    background: var(--surface-light);
    border-color: var(--primary);
}

.switcher-item.active {
    border-color: var(--primary);
    background: rgba(139, 92, 246, 0.1);
}

.switcher-info {
    flex: 1;
    min-width: 0;
}

.switcher-names {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.switcher-code {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
    margin-top: 2px;
}

.switcher-current {
    font-size: 0.75rem;
    color: var(--primary);
    background: var(--primary-glow);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 500;
}

.switcher-new-btn {
    width: 100%;
}

/* ================================
   Settle Up
   ================================ */
.settle-up-wrapper {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: center;
}

.settle-up-btn {
    background: linear-gradient(135deg, var(--accent-green), #059669);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-xl);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.settle-up-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--accent-green-glow);
}

/* ================================
   Settlement History
   ================================ */
.history-section {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.history-toggle {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    transition: var(--transition-fast);
}

.history-toggle:hover {
    background: var(--surface-light);
    color: var(--text-primary);
}

.history-toggle-icon {
    transition: transform var(--transition-fast);
    font-size: 0.75rem;
}

.history-toggle.open .history-toggle-icon {
    transform: rotate(90deg);
}

.history-count {
    margin-left: auto;
    background: var(--primary);
    color: white;
    border-radius: var(--radius-full);
    padding: 0.1rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 1.4rem;
    text-align: center;
}

.history-list {
    margin-top: var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.history-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

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

.history-item-summary {
    color: var(--text-primary);
    font-weight: 500;
}

.history-item-detail {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.history-item-date {
    color: var(--text-muted);
    font-size: 0.75rem;
    white-space: nowrap;
}

/* ================================
   Sync Status
   ================================ */
.sync-status {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    z-index: 500;
}

.sync-status.show {
    transform: translateX(-50%) translateY(0);
}

.sync-status.success {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.sync-icon {
    animation: spin 1s linear infinite;
}

.sync-status.success .sync-icon {
    animation: none;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* ================================
   Responsive - Mobile Adjustments
   Keep side-by-side but adjust sizing
   ================================ */
@media (max-width: 600px) {
    .setup-card {
        padding: var(--spacing-xl);
    }

    .logo h1 {
        font-size: 1.6rem;
    }

    /* Keep split view horizontal - just adjust spacing */
    .person-column {
        padding: var(--spacing-sm);
    }

    .person-header {
        padding-bottom: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .person-name {
        font-size: 1rem;
    }

    .balance-text {
        font-size: 1rem;
    }

    /* Compact quick-add form */
    .quick-add {
        padding: var(--spacing-sm);
        gap: var(--spacing-xs);
    }

    .amount-input {
        font-size: 1.1rem;
        padding: var(--spacing-sm) var(--spacing-xs);
    }

    .currency-symbol {
        padding: 0 var(--spacing-xs) 0 var(--spacing-sm);
        font-size: 1rem;
    }

    .description-input {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }

    .add-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }

    /* Compact entries */
    .entry-item {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .entry-description {
        font-size: 0.75rem;
    }

    .entry-date {
        font-size: 0.65rem;
    }

    .entry-amount {
        font-size: 0.85rem;
    }

    .entry-delete {
        opacity: 1;
        font-size: 0.8rem;
    }

    /* Header adjustments */
    .tracker-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .header-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .share-code-display span {
        font-size: 1.5rem;
    }

    /* Modal adjustments for mobile */
    .modal {
        padding: var(--spacing-md);
    }

    .modal-content {
        max-width: 100%;
    }
}

/* Extra small screens */
@media (max-width: 400px) {
    .person-name {
        font-size: 0.9rem;
    }

    .balance-text {
        font-size: 0.9rem;
    }

    .amount-input {
        font-size: 1rem;
    }

    .description-input::placeholder {
        font-size: 0.7rem;
    }
}

/* ================================
   Account bar (sign-in UI)
   ================================ */
.account-bar {
    margin: 0 0 var(--spacing-md);
    display: flex;
    justify-content: flex-end;
    align-items: center;
    min-height: 1.75rem;
}

.account-signed-out {
    display: flex;
    justify-content: flex-end;
}

.account-link {
    background: none;
    border: none;
    padding: 0.25rem 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color 0.15s ease;
}
.account-link:hover { color: var(--text-primary); }

.account-signed-in {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.25rem 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full, 999px);
    max-width: 100%;
}
.account-avatar {
    width: 24px; height: 24px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-light);
}
.account-info {
    flex: 1;
    min-width: 0;
}
.account-name {
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.85rem;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    max-width: 10rem;
}
.account-email {
    display: none;
}

.bookmark-badge {
    display: inline-block;
    margin-left: 0.4rem;
    padding: 0 0.4rem;
    font-size: 0.7rem;
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.12);
    border-radius: var(--radius-full, 999px);
    vertical-align: middle;
}
.bookmark-badge.cloud {
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.12);
}

/* ================================
   Claim-identity button + modal
   ================================ */
.claim-btn.unclaimed {
    position: relative;
    color: var(--accent-amber);
}
.claim-btn.unclaimed::after {
    content: '';
    position: absolute;
    top: 6px; right: 6px;
    width: 8px; height: 8px;
    background: var(--accent-amber);
    border-radius: 50%;
    box-shadow: 0 0 0 2px var(--bg-dark);
}

.claim-options {
    display: grid;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}
.claim-option {
    padding: 0.9rem 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
    text-align: left;
}
.claim-option:hover {
    background: var(--surface-light);
    border-color: var(--primary);
}
.claim-option .claim-name {
    font-weight: 600;
    color: var(--primary);
    margin-left: 0.25rem;
}

/* ================================
   Settlement-history drill-down
   ================================ */
.history-item {
    background: transparent;
    border: none;
    width: 100%;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
    text-align: left;
    border-top: 1px solid var(--border);
    transition: background 0.15s ease;
}
.history-item:hover { background: var(--surface-light); }
.history-item-chevron {
    color: var(--text-muted);
    font-size: 1.2rem;
    margin-left: auto;
}

.settlement-modal-content {
    max-width: 560px;
    width: min(92vw, 560px);
}
.settlement-meta {
    display: grid;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface);
    border-radius: var(--radius-sm);
}
.settlement-meta-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.settlement-meta-row strong {
    color: var(--text-primary);
    font-weight: 500;
}
.settlement-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}
@media (max-width: 560px) {
    .settlement-columns { grid-template-columns: 1fr; }
}
.settlement-column {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
}
.settlement-column-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0 var(--spacing-xs) var(--spacing-xs);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-xs);
}
.settlement-column-name { font-weight: 600; color: var(--text-primary); }
.settlement-column-total { font-weight: 600; color: var(--primary); }
.settlement-entry-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.35rem;
}
.settlement-entry {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 0.5rem;
    background: var(--bg-card);
    border-radius: 6px;
    font-size: 0.9rem;
}
.settlement-entry.empty {
    color: var(--text-muted);
    justify-content: center;
    font-style: italic;
}
.settlement-entry-desc { color: var(--text-primary); }
.settlement-entry-date { font-size: 0.75rem; color: var(--text-muted); }
.settlement-entry-amount { font-weight: 600; color: var(--text-primary); }