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

:root {
    --color-dark: #1a1a1a;
    --color-body: #2c2c2c;
    --color-mid: #6b6b6b;
    --color-light: #a0a0a0;
    --color-border: #bebebe;
    --color-bg-light: #f5f5f3;
    --color-white: #ffffff;
    --color-accent: #8b4513;
    --color-accent-dark: #6b3410;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    color: var(--color-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 50%, #3a3a3a 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* --- Login --- */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 50%, #3a3a3a 100%);
    position: relative;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        linear-gradient(45deg, transparent 48%, rgba(139, 69, 19, 0.03) 49%, rgba(139, 69, 19, 0.03) 51%, transparent 52%),
        linear-gradient(-45deg, transparent 48%, rgba(139, 69, 19, 0.03) 49%, rgba(139, 69, 19, 0.03) 51%, transparent 52%);
    background-size: 60px 60px;
}

.login-box {
    position: relative;
    background: var(--color-white);
    padding: 48px;
    width: 400px;
}

.login-box h1 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.login-box h1 span {
    font-weight: 300;
    color: var(--color-mid);
}

.login-subtitle {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 32px;
}

.login-divider {
    width: 40px;
    height: 1px;
    background: var(--color-border);
    margin-bottom: 32px;
}

.login-box input {
    width: 100%;
    padding: 1rem;
    margin-bottom: 12px;
    background: var(--color-bg-light);
    border: 1px solid transparent;
    color: var(--color-body);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 300;
    transition: border-color 0.3s ease;
    outline: none;
}

.login-box input:focus {
    border-color: var(--color-accent);
}

.login-box input::placeholder {
    color: var(--color-light);
}

.login-box button {
    width: 100%;
    padding: 1rem;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.3s ease;
}

.login-box button:hover { background: var(--color-accent-dark); }

.login-error {
    color: #c44;
    font-size: 0.85rem;
    font-weight: 300;
    margin-top: 12px;
    display: none;
}

/* --- Dashboard --- */
.dashboard { display: none; }

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 80px;
    background: rgba(26, 26, 26, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.dashboard-header h1 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-white);
}

.dashboard-header h1 span {
    font-weight: 300;
    color: var(--color-mid);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.header-right span {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-light);
}

.btn-logout {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--color-light);
    padding: 0.5rem 1.25rem;
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-logout:hover {
    border-color: var(--color-white);
    color: var(--color-white);
}

/* --- Content --- */
.dashboard-content {
    padding: 2.5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-label {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

/* --- Date picker --- */
.date-picker-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 2rem;
}

.date-label {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-light);
}

.date-input {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: border-color 0.3s ease;
    color-scheme: dark;
}

.date-input:focus {
    border-color: var(--color-accent);
}

.btn-today {
    padding: 0.5rem 1.25rem;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.3s ease;
}

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

/* --- Cards grid --- */
.cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 2.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.card h2 {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1.25rem;
}

.card-divider {
    width: 40px;
    height: 1px;
    background: rgba(255, 255, 255, 0.15);
    margin-bottom: 1.5rem;
}

/* --- User stat rows --- */
.user-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.user-row:last-child { border-bottom: none; }

.user-name {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-white);
    min-width: 140px;
    letter-spacing: 0.5px;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-white);
}

.stat-value.accent { color: var(--color-accent); }

.stat-label {
    font-family: var(--font-heading);
    font-size: 0.6rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-mid);
    margin-top: 2px;
}

.stat-group {
    display: flex;
    gap: 28px;
    align-items: center;
}

.stat-item { text-align: center; }

/* --- Histogram --- */
.chart-container {
    position: relative;
    height: 300px;
    margin-top: 8px;
}

/* --- Weekly table --- */
.weekly-table {
    width: 100%;
    border-collapse: collapse;
}

.weekly-table th {
    text-align: left;
    padding: 10px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-light);
}

.weekly-table td {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 0.95rem;
    font-weight: 300;
    color: var(--color-light);
}

.weekly-table tr:hover td { background: rgba(255, 255, 255, 0.03); }

.weekly-table td:first-child {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-white);
    letter-spacing: 0.5px;
}

/* --- Loading / Empty --- */
.loading, .empty {
    text-align: center;
    padding: 2.5rem;
    font-size: 0.9rem;
    font-weight: 300;
    color: var(--color-light);
}

.refresh-time {
    font-family: var(--font-heading);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-light);
    text-align: right;
    margin-top: 12px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .dashboard-header { padding: 0 1.5rem; }
    .dashboard-content { padding: 1.5rem; }
    .cards-row { grid-template-columns: 1fr; }
    .card { padding: 2rem; }
    .stat-group { gap: 16px; }
    .login-box { width: 90%; padding: 32px; }
    .weekly-table { font-size: 0.85rem; }
    .weekly-table th, .weekly-table td { padding: 8px 10px; }
}