/* =========================================================================
   Base Colors & Typography
   ========================================================================= */
:root {
    --bg-color: #0d1117;
    --text-color: #e6edf3;
    --text-muted: #8b949e;

    --card-bg: rgba(22, 27, 34, 0.6);
    --card-border: rgba(240, 246, 252, 0.1);

    --primary: #58a6ff;
    --primary-hover: #3182ce;
    --danger: #f85149;
    --danger-hover: #da3633;
    --success: #2ea043;
    --warning: #d29922;

    --gradient-1: linear-gradient(135deg, #1f6feb 0%, #8957e5 100%);
    --gradient-2: linear-gradient(135deg, #2ea043 0%, #3fb950 100%);

    --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* =========================================================================
   Utility Classes & Layout
   ========================================================================= */
.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    padding-bottom: 80px;
    /* space for potential bottom nav */
}

.view {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.view.active {
    display: block;
}

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

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

/* =========================================================================
   Header
   ========================================================================= */
.glass-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
    margin: -20px -20px 20px -20px;
}

.glass-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.2s, transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--card-bg);
    transform: scale(1.05);
}

/* =========================================================================
   Header Actions & Dropdown
   ========================================================================= */
.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    min-width: 180px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.5);
    z-index: 200;
    margin-top: 10px;
    padding: 8px 0;
    border-radius: 12px;
    background: #161b22;
    border: 1px solid var(--card-border);
}

.dropdown-content.show {
    display: block;
    animation: fadeIn 0.2s ease-in-out;
}

.dropdown-item {
    background: transparent;
    border: none;
    color: var(--text-color);
    padding: 12px 16px;
    text-align: left;
    width: 100%;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: background 0.2s;
}

.dropdown-item:hover {
    background: rgba(30, 36, 45, 0.8);
}

/* =========================================================================
   Stats Cards
   ========================================================================= */
.stats-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 25px;
}

.stat-card {
    padding: 20px;
    border-radius: 16px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.8;
    z-index: -1;
}

.primary-gradient::before {
    background: var(--gradient-1);
}

.secondary-gradient::before {
    background: var(--gradient-2);
}

.stat-label {
    display: block;
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 5px;
    font-weight: 600;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
}

/* =========================================================================
   Chart Section
   ========================================================================= */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(10px);
    margin-bottom: 25px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.chart-section h3 {
    font-size: 1.2rem;
    margin-bottom: 0;
    font-weight: 600;
}

.projection-days-control {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.projection-days-control input {
    width: 60px;
    padding: 4px 8px;
    background: rgba(13, 17, 23, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    color: var(--text-color);
    font-family: var(--font-family);
    font-size: 0.85rem;
    text-align: center;
    transition: all 0.2s;
}

.projection-days-control input:focus,
.projection-days-control input:hover {
    outline: none;
    border-color: var(--primary);
    background: rgba(13, 17, 23, 0.8);
}

.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}

/* =========================================================================
   Tabs
   ========================================================================= */
.tab-nav {
    display: flex;
    background: rgba(22, 27, 34, 0.4);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 20px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 10px 0;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: var(--card-bg);
    color: var(--text-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* =========================================================================
   Lists
   ========================================================================= */
.list-view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.list-view.active {
    display: block;
}

.items-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 15px;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

.list-item:hover {
    background: rgba(30, 36, 45, 0.8);
    transform: translateX(4px);
}

.item-main {
    display: flex;
    flex-direction: column;
}

.item-name {
    font-weight: 600;
    font-size: 1rem;
}

.item-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.item-amount {
    font-weight: 700;
    font-size: 1.1rem;
}

.amount-inflow {
    color: var(--success);
}

.amount-outflow {
    color: var(--text-color);
}

.quick-log-btn {
    opacity: 0.6;
}

.quick-log-btn:hover {
    opacity: 1;
    background: rgba(46, 160, 67, 0.1);
    transform: scale(1.1);
}

.skip-btn {
    opacity: 0.6;
}

.skip-btn:hover {
    opacity: 1;
    background: rgba(210, 153, 34, 0.1);
    transform: scale(1.1);
}

/* =========================================================================
   Modals & Forms
   ========================================================================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: flex-end;
    /* Mobile friendly bottom sheet */
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-bottom: 0;
    padding-bottom: 40px;
    /* Safe area padding */
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header .close-modal {
    font-size: 2rem;
    line-height: 1;
    width: 40px;
    height: 40px;
}

/* Form Toggle */
.form-toggle {
    display: flex;
    background: rgba(22, 27, 34, 0.4);
    border-radius: 8px;
    padding: 4px;
    margin-bottom: 20px;
}

.toggle-control {
    flex: 1;
    position: relative;
}

.toggle-control input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.control-label {
    display: block;
    text-align: center;
    padding: 8px 0;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.2s;
}

.toggle-control input:checked+.control-label {
    background: var(--card-border);
    color: var(--text-color);
}

/* Form Inputs */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

input[type="text"],
input[type="number"],
input[type="date"],
select {
    width: 100%;
    padding: 12px;
    background: rgba(13, 17, 23, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-color);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

/* Hide spin buttons */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

/* Firefox date fix for dark mode */
input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
}

.date-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* Buttons */
.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 25px;
}

.btn-primary,
.btn-danger {
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    flex: 1;
}

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

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

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

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

.btn-primary:active,
.btn-danger:active {
    transform: scale(0.98);
}

/* =========================================================================
   Responsive / Mobile Constraints
   ========================================================================= */
@media (max-width: 600px) {
    .stat-value {
        font-size: 1.4rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }
}