/* ===== VARIABLES ===== */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-glass: rgba(255, 255, 255, 0.08);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-1: #6366f1;
    --accent-2: #8b5cf6;
    --accent-3: #a78bfa;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a78bfa);
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --sidebar-width: 240px;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 14px;
}

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

a {
    color: inherit;
    text-decoration: none;
}

.hidden {
    display: none !important;
}

/* ===== AUTH SCREEN ===== */
.auth-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 1000;
}

.auth-container {
    text-align: center;
    z-index: 10;
    animation: fadeInUp 0.8s ease;
}

.auth-logo {
    font-size: 5rem;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 30px var(--accent-glow));
    animation: float 3s ease-in-out infinite;
}

.auth-title {
    font-size: 3rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.auth-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.auth-form input {
    width: 320px;
    padding: 14px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.auth-form input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 20px var(--accent-glow);
}

.auth-form button,
.upload-browse-btn {
    padding: 14px 40px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.auth-form button:hover,
.upload-browse-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.auth-error {
    color: var(--danger);
    font-size: 0.9rem;
    min-height: 1.5em;
}

.auth-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-1);
    border-radius: 50%;
    opacity: 0.3;
    animation: particleFloat linear infinite;
}

/* ===== UPLOAD SCREEN ===== */
.upload-screen {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 999;
}

.upload-container {
    text-align: center;
    animation: fadeInUp 0.6s ease;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.upload-container h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    max-width: 400px;
}

.upload-zone {
    width: 480px;
    padding: 3rem 2rem;
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-1);
    background: rgba(99, 102, 241, 0.05);
}

.upload-zone-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.upload-zone-or {
    color: var(--text-muted);
    margin: 1rem 0;
}

.upload-progress {
    margin-top: 2rem;
    width: 480px;
}

.progress-bar {
    height: 6px;
    background: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 3px;
    width: 0%;
    transition: width 0.3s ease;
}

/* ===== SIDEBAR ===== */
.app {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-glass);
}

.sidebar-logo {
    font-size: 1.8rem;
}

.sidebar-title {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    transition: var(--transition);
    border-left: 3px solid transparent;
    font-size: 0.92rem;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-item.active {
    color: var(--accent-3);
    background: rgba(99, 102, 241, 0.08);
    border-left-color: var(--accent-1);
}

.nav-icon {
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-glass);
}

.sidebar-reload {
    width: 100%;
    padding: 10px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.sidebar-reload:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 0 2rem 2rem;
    min-height: 100vh;
}

.top-bar {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    z-index: 50;
    margin-bottom: 1rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

.top-bar-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.file-name {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.record-count {
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 4px 10px;
    background: var(--bg-glass);
    border-radius: 20px;
    border: 1px solid var(--border-glass);
}

/* ===== FILTER BAR ===== */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

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

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: var(--text-secondary);
    user-select: none;
}

.filter-chip:hover {
    border-color: var(--accent-1);
}

.filter-chip.active {
    background: rgba(99, 102, 241, 0.15);
    border-color: var(--accent-1);
    color: var(--accent-3);
}

.filter-chip .chip-count {
    font-size: 0.7rem;
    opacity: 0.6;
}

.filter-chip .chip-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.filter-select-all {
    background: none;
    border: none;
    color: var(--accent-3);
    font-size: 0.8rem;
    cursor: pointer;
    font-family: inherit;
    padding: 4px 8px;
    border-radius: 6px;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-select-all:hover {
    background: rgba(99, 102, 241, 0.1);
}

/* ===== REPORTS ===== */
.report-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.report-section.active {
    display: block;
}

.report-title {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

/* ===== KPI CARDS ===== */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.kpi-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.kpi-label {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.kpi-sub {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 0.3rem;
}

/* ===== CHART CARDS ===== */
.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.chart-card:hover {
    background: var(--bg-card-hover);
}

.chart-card.wide {
    grid-column: 1 / -1;
}

.chart-card h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.chart-card canvas {
    max-height: 350px;
}

/* ===== DATA TABLE ===== */
.data-table-container {
    max-height: 400px;
    overflow-y: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-3);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 1;
}

.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

.data-table tr:hover td {
    background: var(--bg-glass);
    color: var(--text-primary);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes float {

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

    50% {
        transform: translateY(-12px);
    }
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 0.4;
    }

    90% {
        opacity: 0.4;
    }

    100% {
        transform: translateY(-10vh) rotate(360deg);
        opacity: 0;
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .chart-row {
        grid-template-columns: 1fr;
    }

    .chart-card.wide {
        grid-column: 1;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 0 1rem 1rem;
    }

    .menu-toggle {
        display: block;
    }

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

    .auth-form input,
    .upload-zone,
    .upload-progress {
        width: 90vw;
        max-width: 480px;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }

    html {
        font-size: 13px;
    }
}