/* ─── Design Tokens ─────────────────────────────────────────── */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #818cf8;
    --primary-bg: #eef2ff;
    --success: #10b981;
    --success-hover: #059669;
    --danger: #ef4444;
    --warning: #f59e0b;
    --bg: #f1f5f9;
    --card: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
}

/* ─── Reset ─────────────────────────────────────────────────── */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ─── Base ──────────────────────────────────────────────────── */
html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
                 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}


.btn-danger-outline {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
}

.btn-danger-outline:hover {
    background: var(--danger);
    color: #fff;
}

/* Mobile Sidebar */

.mobile-sidebar {
    position: fixed;
    top: 0;
    right: -300px;
    width: 250px;
    height: 100vh;
    background: var(--card);
    box-shadow: -4px 0 15px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: right 0.3s ease;
    display: flex;
    flex-direction: column;
}

.mobile-sidebar.open {
    right: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-content {
    padding: 1.5rem;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.open {
    display: block;
    opacity: 1;
}



/* ─── Cards ─────────────────────────────────────────────────── */
.card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.25rem;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text);
}

/* ─── Forms ─────────────────────────────────────────────────── */
.form-row {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
    flex-wrap: wrap;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

input[type='month'],
input[type='number'],
input[type='text'] {
    padding: 0.55rem 0.75rem;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fff;
    color: var(--text);
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
    padding: 0.55rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.3);
}

.btn-success {
    background: var(--success);
    color: #fff;
}

.btn-success:hover {
    background: var(--success-hover);
}

.btn-success.saved {
    background: var(--success-hover);
    transform: scale(1.02);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--text-light);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg);
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    padding: 0.2rem 0.35rem;
    opacity: 0.35;
    transition: opacity 0.2s;
    border-radius: 4px;
}

.btn-icon:hover {
    opacity: 1;
    background: rgba(239, 68, 68, 0.08);
}

/* ─── Tables ────────────────────────────────────────────────── */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 2px solid var(--border);
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
}

tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background 0.15s;
}

tbody tr:hover {
    background: var(--primary-bg);
}

.amount {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.positive {
    color: var(--success);
    font-weight: 600;
}

.negative {
    color: var(--danger);
    font-weight: 600;
}

.empty {
    text-align: center;
    color: var(--text-light);
    padding: 2.5rem 1rem !important;
    font-style: italic;
}

/* Total row in balance table */
.total-row {
    background: var(--primary-bg) !important;
    border-top: 2px solid var(--primary);
}

.total-row td {
    padding-top: 0.55rem;
    padding-bottom: 0.55rem;
}

/* Select / dropdown */
select {
    padding: 0.55rem 0.75rem;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #fff;
    color: var(--text);
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

/* Bank management */
.bank-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    text-decoration: none;
    border-radius: 6px;
    cursor: pointer;
    white-space: nowrap;
}

/* Divider between button groups */
.divider {
    width: 1px;
    height: 1.2rem;
    background: var(--border);
    margin: 0 0.25rem;
}

/* Filter card */
.filter-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 1rem 1.5rem;
}

.filter-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.filter-pills {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.filter-pill {
    padding: 0.3rem 0.75rem;
    border: 1.5px solid var(--border);
    border-radius: 20px;
    background: transparent;
    color: var(--text-light);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.filter-pill:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.filter-pill.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 1px 3px rgba(79, 70, 229, 0.25);
}

/* Type badge in table */
.type-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 12px;
    font-size: 0.78rem;
    font-weight: 500;
    background: var(--primary-bg);
    color: var(--primary);
}

/* ─── Chart ─────────────────────────────────────────────────── */
.chart-container {
    position: relative;
    height: 300px;
    margin-top: 0.25rem;
}

/* ─── Expense-specific ──────────────────────────────────────── */
.exp-input {
    width: 130px;
    text-align: right;
}

.expense-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 0.75rem;
    border-top: 2px solid var(--primary);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--primary);
    margin-top: 0.25rem;
}

.actions-bar {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.actions-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-remove-cat {
    font-size: 0.7rem !important;
    color: var(--danger) !important;
    opacity: 0;
    margin-left: 0.5rem;
    vertical-align: middle;
    transition: opacity 0.15s;
}

tr:hover .btn-remove-cat {
    opacity: 0.6;
}

.btn-remove-cat:hover {
    opacity: 1 !important;
    background: rgba(239, 68, 68, 0.1) !important;
}

/* ─── Toast notification ────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--text);
    color: #fff;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    .btn-sm {
        padding: 0.3rem 0.5rem;
        font-size: 0.75rem;
    }

    .card {
        padding: 1rem;
    }

    .form-row {
        flex-direction: column;
    }

    .form-group {
        width: 100%;
    }

    .form-group input, .form-group select {
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .actions-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .actions-buttons {
        flex-direction: column;
    }

    .exp-input {
        width: 100%;
    }

    .chart-container {
        height: 250px;
    }

    .expense-footer {
        font-size: 0.9rem;
    }

    /* Responsive tables */
    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    th, td {
        padding: 0.4rem;
        font-size: 0.8rem;
        white-space: nowrap;
    }

    /* Chat panel */
    .chat-panel {
        width: 100%;
        right: 0;
        bottom: 0;
        border-radius: 16px 16px 0 0;
        height: 70vh;
    }

    .chat-fab {
        bottom: 16px;
        right: 16px;
        width: 48px;
        height: 48px;
    }

    /* Filter pills */
    .filter-pills {
        flex-wrap: wrap;
    }

    .filter-pill {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
}

/* ═══════════════════════════════════════════════════════════════
   AI CHAT PANEL
   ═══════════════════════════════════════════════════════════════ */

/* Floating Action Button */
.chat-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 58px;
    height: 58px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.chat-fab:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 24px rgba(79, 70, 229, 0.45);
}

.chat-fab-icon { line-height: 1; }

.chat-fab-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: #94a3b8;
}

.chat-fab-badge.online { background: #22c55e; }
.chat-fab-badge.offline { background: #ef4444; }

/* Chat Panel */
.chat-panel {
    position: fixed;
    bottom: 0;
    right: 24px;
    width: 420px;
    height: 520px;
    background: #fff;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.15);
    z-index: 2001;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.chat-panel.open {
    transform: translateY(0);
}

/* Header */
.chat-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--primary);
    color: #fff;
    flex-shrink: 0;
}

.chat-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.chat-model {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-left: auto;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.15);
}

.chat-model.online { background: rgba(34, 197, 94, 0.3); }
.chat-model.offline { background: rgba(239, 68, 68, 0.3); }

.chat-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.25rem;
    opacity: 0.7;
    transition: opacity 0.2s;
    margin-left: 0.25rem;
}

.chat-close:hover { opacity: 1; }

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.chat-welcome {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

.chat-welcome strong { color: var(--text); }

.chat-examples {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-light);
}

.chat-examples em {
    color: var(--primary);
    font-style: normal;
}

/* Message Bubbles */
.chat-msg {
    display: flex;
    max-width: 88%;
}

.chat-msg.user {
    align-self: flex-end;
}

.chat-msg.bot {
    align-self: flex-start;
}

.chat-bubble {
    padding: 0.6rem 0.85rem;
    border-radius: 14px;
    font-size: 0.88rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.chat-msg.user .chat-bubble {
    background: var(--primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.chat-msg.bot .chat-bubble {
    background: #f1f5f9;
    color: var(--text);
    border-bottom-left-radius: 4px;
}

.chat-msg.bot .chat-bubble code {
    background: rgba(0, 0, 0, 0.06);
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
    font-size: 0.82rem;
}

.chat-msg-text { display: inline; }

/* Inline Chart */
.chat-chart {
    margin-top: 0.75rem;
    padding: 0.5rem;
    background: #fff;
    border-radius: 8px;
    border: 1px solid var(--border);
    max-width: 320px;
}

.chat-chart canvas {
    max-height: 200px;
}

/* Typing Indicator */
.typing-dots {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}

.typing-dots span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #94a3b8;
    animation: typing-bounce 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(2) { animation-delay: 0.16s; }
.typing-dots span:nth-child(3) { animation-delay: 0.32s; }

@keyframes typing-bounce {
    0%, 80%, 100% { transform: scale(0.7); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* Input Area */
.chat-input-area {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    background: #fff;
    flex-shrink: 0;
}

.chat-input-area input {
    flex: 1;
    padding: 0.55rem 0.75rem;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.88rem;
    outline: none;
    transition: border-color 0.2s;
}

.chat-input-area input:focus {
    border-color: var(--primary);
}

.chat-send {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    flex-shrink: 0;
}

.chat-send:hover {
    background: var(--primary-hover);
}
body.dark {
    --bg: #0f172a;
    --card: #1e293b;
    --text: #f8fafc;
    --text-light: #94a3b8;
    --border: #334155;
    --primary-bg: #1e1b4b;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
}
body.dark .filter-pill {
    background: #334155;
    color: #cbd5e1;
}
body.dark .filter-pill.active {
    background: var(--primary);
    color: white;
}
body.dark .type-badge {
    background: #334155 !important;
}
body.dark input, body.dark select {
    background: #0f172a;
    color: #f8fafc;
    border-color: #334155;
}
body.dark table th {
    background: #334155;
}
body.dark table td {
    border-bottom: 1px solid #334155;
}
body.dark .chat-bubble.bot {
    background: #334155;
}

body.dark .chat-panel { background: var(--card); }
body.dark .chat-input-area { background: var(--card); }
body.dark .chat-chart { background: var(--card); }

/* --- APP SHELL ---------------------------------------------- */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Desktop Sidebar */
.app-sidebar {
    width: 250px;
    background: var(--card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 10;
}

.sidebar-brand {
    padding: 1.5rem;
    font-size: 1.4rem;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-weight: 500;
}

.sidebar-link:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.sidebar-link.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.3);
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 0.5rem;
    padding: 0 0.5rem;
}

/* Main Content Area */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg);
    overflow: hidden;
}

.app-header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 5;
}

.app-header-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

.app-content {
    flex: 1;
    padding: 1.5rem 2rem;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

/* Constrain content width for readability on large screens */
.app-content > * {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
}

/* Thin custom scrollbar for app-content */
.app-content::-webkit-scrollbar {
    width: 6px;
}

.app-content::-webkit-scrollbar-track {
    background: transparent;
}

.app-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.app-content::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* Mobile Bottom Nav (Hidden on Desktop) */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--card);
    border-top: 1px solid var(--border);
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
}

.bottom-nav-inner {
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
}

.bottom-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.75rem;
    padding: 0.5rem;
    border-radius: 8px;
    flex: 1;
    text-align: center;
}

.bottom-link i {
    font-size: 1.25rem;
}

.bottom-link.active {
    color: var(--primary);
}

/* Calculators Grid */
.calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.calc-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.calc-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.calc-icon {
    font-size: 3rem;
    background: var(--primary-bg);
    width: 80px;
    height: 80px;
    line-height: 80px;
    border-radius: 50%;
}

.calc-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    color: var(--text);
}

.calc-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0;
}

/* Calculator UI Layout */
.calc-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.calc-inputs {
    background: var(--card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.calc-results {
    background: var(--card);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.result-box {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .app-sidebar {
        display: none; /* Hide sidebar on mobile */
    }
    
    .bottom-nav {
        display: block; /* Show bottom nav on mobile */
    }
    
    .app-content {
        padding: 1rem;
        padding-bottom: 5rem; /* space for bottom nav */
    }
    
    .app-header {
        padding: 1rem;
    }
    
    .calc-layout {
        grid-template-columns: 1fr;
    }
    
    /* Reposition FAB above bottom nav */
    .chat-fab {
        bottom: calc(5rem + env(safe-area-inset-bottom));
    }
}

/* Custom Modal CSS */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.modal-overlay.show {
    opacity: 1;
}

.modal-card {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
    width: 90%;
    max-width: 400px;
    background: var(--card);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    z-index: 1001;
    opacity: 0;
    transition: all 0.2s ease-in-out;
}

.modal-card.show {
    opacity: 1;
    transform: translate(-50%, -50%);
}

.modal-card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.modal-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}