/* FinTrack — Mobile-first dark-mode design */

/* === Design Tokens === */
:root {
    --bg-primary: #0b1120;
    --bg-secondary: #111827;
    --bg-card: #1f2937;
    --bg-input: #374151;

    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-soft: rgba(59, 130, 246, 0.15);

    --success: #10b981;
    --success-soft: rgba(16, 185, 129, 0.12);
    --warning: #f59e0b;
    --warning-soft: rgba(245, 158, 11, 0.12);
    --danger: #ef4444;
    --danger-soft: rgba(239, 68, 68, 0.12);

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.35);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* === Base & Layout === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header — sticky, compact */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: var(--space-md) var(--space-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-inner {
    max-width: 640px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

header h1 {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

/* Tab bar — underline style */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.tab {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    position: relative;
    transition: color var(--transition-fast);
}

.tab:hover {
    color: var(--text-secondary);
}

.tab.active {
    color: var(--accent);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: var(--space-md);
    right: var(--space-md);
    height: 2px;
    background: var(--accent);
    border-radius: 1px 1px 0 0;
}

/* Main content */
main {
    flex: 1;
    max-width: 640px;
    margin: 0 auto;
    width: 100%;
    padding: var(--space-lg);
}

/* Sections */
.section {
    display: none;
}

.section.active {
    display: block;
    animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Upload Section === */
.upload-area {
    border: 2px dashed var(--bg-input);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition-normal), background var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent);
    background: var(--accent-soft);
}

.upload-area input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.upload-area:hover .upload-icon {
    color: var(--accent);
}

.upload-label {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.upload-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* Image preview */
.image-preview {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-md);
    box-shadow: var(--shadow-md);
    display: none;
}

.image-preview.visible {
    display: block;
}

.image-preview img {
    width: 100%;
    display: block;
    border-radius: var(--radius-md);
}

.image-preview .remove-btn {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: rgba(0,0,0,0.7);
    border: none;
    color: white;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.image-preview .remove-btn:hover {
    background: rgba(239, 68, 68, 0.8);
}

/* Form elements */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-group input,
.form-group select {
    background: var(--bg-input);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
    width: 100%;
}

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

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid rgba(255,255,255,0.08);
}

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

.btn-danger {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-sm {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.8125rem;
}

/* Processing indicator */
.processing {
    display: none;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--accent-soft);
    border-radius: var(--radius-md);
    margin-top: var(--space-md);
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 500;
}

.processing.visible {
    display: flex;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--accent-soft);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* === Records Section === */
.summary-bar {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.summary-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
}

.summary-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.summary-value {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.summary-value.positive { color: var(--success); }
.summary-value.negative { color: var(--danger); }

/* Filter bar */
.filter-bar {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    overflow-x: auto;
    padding-bottom: var(--space-xs);
    -webkit-overflow-scrolling: touch;
}

.filter-chip {
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-full);
    padding: var(--space-xs) var(--space-md);
    font-size: 0.8125rem;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.filter-chip:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.filter-chip.active {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

/* Record card */
.record-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    display: flex;
    gap: var(--space-md);
    transition: box-shadow var(--transition-fast);
    cursor: pointer;
    border: 1px solid rgba(255,255,255,0.04);
    position: relative;
}

.record-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(255,255,255,0.08);
}

/* Type indicator stripe */
.record-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: var(--space-sm);
    bottom: var(--space-sm);
    width: 3px;
    border-radius: 0 2px 2px 0;
}

.record-card[data-type="payslip"]::before { background: var(--success); }
.record-card[data-type="receipt"]::before { background: var(--danger); }
.record-card[data-type="clock_in"]::before { background: var(--warning); }
.record-card[data-type="clock_out"]::before { background: var(--accent); }

/* Thumbnail */
.record-thumb {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-input);
}

.record-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.record-thumb .placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 20px;
}

/* Card content */
.record-info {
    flex: 1;
    min-width: 0;
}

.record-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: 2px;
}

.record-type-badge {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 1px 6px;
    border-radius: 3px;
}

.record-type-badge.payslip { background: var(--success-soft); color: var(--success); }
.record-type-badge.receipt { background: var(--danger-soft); color: var(--danger); }
.record-type-badge.clock_in { background: var(--warning-soft); color: var(--warning); }
.record-type-badge.clock_out { background: var(--accent-soft); color: var(--accent); }

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

.record-category {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.record-description {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px;
}

.record-amount {
    font-size: 1.0625rem;
    font-weight: 700;
    text-align: right;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.record-amount.positive { color: var(--success); }
.record-amount.negative { color: var(--danger); }

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    opacity: 0.4;
}

.empty-state-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.empty-state-subtitle {
    font-size: 0.8125rem;
}

/* === Clock Section === */
.clock-view {
    text-align: center;
}

.clock-display {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    font-variant-numeric: tabular-nums;
}

.clock-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.clock-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-xl);
}

.clock-status.checked-in {
    background: var(--success-soft);
    color: var(--success);
}

.clock-status.checked-out {
    background: var(--bg-input);
    color: var(--text-secondary);
}

.clock-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.clock-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-width: 320px;
    margin: 0 auto var(--space-xl);
}

.clock-actions .btn {
    flex: 1;
}

/* Weekly log */
.weekly-log {
    margin-top: var(--space-lg);
}

.weekly-log h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    text-align: left;
}

.weekly-entry {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    font-size: 0.875rem;
}

.weekly-day {
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 80px;
}

.weekly-hours {
    font-variant-numeric: tabular-nums;
    color: var(--text-primary);
    font-weight: 600;
}

.weekly-total {
    display: flex;
    justify-content: space-between;
    padding: var(--space-md) 0 var(--space-sm);
    margin-top: var(--space-sm);
    border-top: 2px solid rgba(255,255,255,0.08);
    font-weight: 700;
    font-size: 0.9375rem;
}

/* === Modal === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 200;
    display: none;
    align-items: flex-end;
    justify-content: center;
}

.modal-overlay.visible {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: var(--space-lg);
    width: 100%;
    max-width: 640px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: slideUp 250ms ease;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.modal-handle {
    width: 32px;
    height: 4px;
    background: var(--bg-input);
    border-radius: 2px;
    margin: 0 auto var(--space-md);
}

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

.modal-header h2 {
    font-size: 1.0625rem;
    font-weight: 700;
}

.modal-close {
    background: var(--bg-input);
    border: none;
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-lg);
    font-size: 0.875rem;
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    z-index: 300;
    transition: transform var(--transition-normal);
    max-width: calc(100vw - 2rem);
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }

/* === Responsive === */
@media (max-width: 480px) {
    main {
        padding: var(--space-md);
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .summary-bar {
        grid-template-columns: 1fr;
    }

    .clock-display {
        font-size: 2.25rem;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .summary-bar {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

@media (min-width: 769px) {
    .modal-overlay {
        align-items: center;
    }

    .modal {
        border-radius: var(--radius-lg);
        margin: auto;
    }
}

/* Safe area for notch/home indicator phones */
@supports (padding: max(0px)) {
    header, main {
        padding-left: max(var(--space-lg), env(safe-area-inset-left));
        padding-right: max(var(--space-lg), env(safe-area-inset-right));
    }

    main {
        padding-bottom: max(var(--space-lg), env(safe-area-inset-bottom));
    }
}