:root {
    --bg: #f2f8fb;
    --surface: #ffffff;
    --ink: #123041;
    --muted: #5a7383;
    --line: #d9e8ef;
    --brand: #00a3d9;
    --brand-light: #4ddbff;
    --brand-dark: #0087b5;
    --brand-soft: #e6f7fc;
    --brand-gradient: linear-gradient(145deg, #00a3d9, #4ddbff);
    --accent: #0b6e8a;
    --sidebar: #0b3d52;
    --sidebar-text: #c5e4f0;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(0, 163, 217, 0.08);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "IBM Plex Sans", system-ui, sans-serif;
    background: var(--bg);
    color: var(--ink);
}

h1, h2, h3, .page-title, .brand-text {
    font-family: "DM Sans", "IBM Plex Sans", sans-serif;
}

.app-shell {
    min-height: 100vh;
    display: flex;
}

.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #0c4a63 0%, #08384c 100%);
    color: var(--sidebar-text);
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 1.25rem 1rem;
}

.sidebar-brand {
    display: flex;
    gap: .85rem;
    align-items: center;
    padding: .5rem .65rem 1.5rem;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: var(--brand-gradient);
    display: grid;
    place-items: center;
    color: #fff;
    box-shadow: 0 6px 16px rgba(0, 163, 217, 0.35);
}

.brand-text {
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.brand-sub {
    font-size: .75rem;
    color: #8ebfd0;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    flex: 1;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: .75rem;
    color: var(--sidebar-text);
    padding: .75rem .9rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: .15s ease;
}

.sidebar-nav .nav-link i {
    width: 1.1rem;
    text-align: center;
    opacity: .9;
}

.sidebar-nav .nav-link:hover {
    background: rgba(255,255,255,.06);
    color: #fff;
}

.sidebar-nav .nav-link.active {
    background: rgba(0, 163, 217, .22);
    color: #fff;
    box-shadow: inset 3px 0 0 #4ddbff;
}

.sidebar-footer {
    margin-top: auto;
    padding: 1rem .9rem .4rem;
    border-top: 1px solid rgba(255,255,255,.08);
}

.main-area {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 20;
}

.page-title {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.page-subtitle {
    color: var(--muted);
    font-size: .9rem;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: .75rem;
}

.content {
    padding: 1.5rem;
}

.btn-primary {
    --bs-btn-bg: var(--brand);
    --bs-btn-border-color: var(--brand);
    --bs-btn-hover-bg: var(--brand-dark);
    --bs-btn-hover-border-color: var(--brand-dark);
    --bs-btn-active-bg: var(--brand-dark);
    --bs-btn-active-border-color: var(--brand-dark);
    background-image: var(--brand-gradient);
    border: none;
    box-shadow: 0 8px 18px rgba(0, 163, 217, 0.28);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
    background-image: linear-gradient(145deg, #008fbf, #2fc8ef);
    border: none;
}

.btn-report {
    font-weight: 600;
    padding: .6rem 1rem;
}

.btn-icon {
    width: 42px;
    height: 42px;
    display: inline-grid;
    place-items: center;
    border: 1px solid var(--line);
    background: #fff;
}

.btn-user {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    border: 1px solid var(--line);
    background: #fff;
    padding: .35rem .7rem .35rem .35rem;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--brand-gradient);
    color: #fff;
    display: inline-grid;
    place-items: center;
    font-weight: 700;
    font-size: .85rem;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
}

.stat-card, .panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.stat-card {
    padding: 1.15rem 1.25rem;
}

.stat-label {
    color: var(--muted);
    font-size: .85rem;
    margin-bottom: .35rem;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    font-family: "DM Sans", sans-serif;
}

.panel {
    padding: 1.25rem;
    margin-bottom: 1rem;
}

.panel-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.table {
    --bs-table-bg: transparent;
}

.table thead th {
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
    font-weight: 600;
    border-bottom-width: 1px;
}

.badge-success { background: #d8f5e8; color: #0f7a52; }
.badge-info { background: #dff4fb; color: #0079a3; }
.badge-warning { background: #fff1df; color: #9a5b12; }
.badge-secondary { background: #eef1f5; color: #516070; }
.badge {
    font-weight: 600;
    border-radius: 999px;
    padding: .35em .7em;
}

.form-control, .form-select {
    border-radius: 10px;
    border-color: #d5dde7;
    padding: .7rem .9rem;
}

.form-label {
    font-weight: 600;
    font-size: .9rem;
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at top left, rgba(77, 219, 255, .35), transparent 42%),
        radial-gradient(circle at bottom right, rgba(0, 163, 217, .22), transparent 38%),
        linear-gradient(160deg, #f4fbfe, #e5f4fa);
    padding: 1.5rem;
}

.auth-card {
    width: min(420px, 100%);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.quick-form .form-control,
.quick-form .form-select {
    font-size: 1.05rem;
    min-height: 52px;
}

.quick-form .btn-lg {
    min-height: 54px;
    font-weight: 700;
}

.hours-preview {
    background: var(--brand-soft);
    color: var(--brand-dark);
    border-radius: 12px;
    padding: 1rem 1.15rem;
    font-weight: 700;
    font-size: 1.15rem;
}

.empty-state {
    text-align: center;
    color: var(--muted);
    padding: 2rem 1rem;
}

/* Calendar */
.calendar-toolbar {
    padding: 1rem 1.15rem;
}

.calendar-period-title {
    font-family: "DM Sans", sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.calendar-week {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: .75rem;
}

.calendar-day {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    min-height: 280px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.calendar-day.is-today {
    border-color: var(--brand);
    box-shadow: 0 0 0 1px var(--brand), var(--shadow);
}

.calendar-day.is-weekend {
    background: #f8fafb;
}

.calendar-day-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: .85rem .9rem .55rem;
    border-bottom: 1px solid var(--line);
}

.calendar-day-name {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
    font-weight: 600;
}

.calendar-day-number {
    font-family: "DM Sans", sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.1;
}

.calendar-day-total {
    font-size: .8rem;
    font-weight: 600;
    color: var(--brand);
    background: var(--brand-soft);
    border-radius: 999px;
    padding: .25rem .55rem;
}

.calendar-day-body {
    flex: 1;
    padding: .65rem;
    display: flex;
    flex-direction: column;
    gap: .45rem;
    overflow: auto;
}

.calendar-entry {
    display: block;
    text-decoration: none;
    color: inherit;
    border-left: 3px solid var(--entry-color, var(--brand));
    background: #f4fbfe;
    border-radius: 8px;
    padding: .55rem .65rem;
    transition: .15s ease;
}

.calendar-entry:hover {
    background: #e8f7fc;
    transform: translateY(-1px);
}

.calendar-entry-hours {
    font-weight: 700;
    font-size: .9rem;
}

.calendar-entry-project {
    font-size: .82rem;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.calendar-entry-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .35rem;
    margin-top: .25rem;
    font-size: .72rem;
    color: var(--muted);
}

.calendar-add-btn {
    margin: .35rem .65rem .65rem;
    border: 1px dashed #c9d4df;
    background: transparent;
    color: var(--muted);
    border-radius: 8px;
    padding: .55rem;
    font-weight: 600;
    font-size: .85rem;
}

.calendar-add-btn:hover {
    border-color: var(--brand);
    color: var(--brand);
    background: var(--brand-soft);
}

.calendar-month {
    padding: 0;
    overflow: hidden;
}

.calendar-month-head,
.calendar-month-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
}

.calendar-month-head > div {
    padding: .75rem;
    text-align: center;
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
    font-weight: 600;
    border-bottom: 1px solid var(--line);
}

.calendar-month-cell {
    min-height: 110px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: .5rem;
    cursor: pointer;
    transition: background .15s ease;
}

.calendar-month-cell:nth-child(7n) {
    border-right: none;
}

.calendar-month-cell:hover {
    background: #f4fbfe;
}

.calendar-month-cell.is-outside {
    background: #f8fafb;
    opacity: .55;
}

.calendar-month-cell.is-today {
    background: var(--brand-soft);
}

.calendar-month-cell-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: .35rem;
}

.calendar-month-date {
    font-weight: 700;
    font-family: "DM Sans", sans-serif;
}

.calendar-month-hours {
    font-size: .75rem;
    font-weight: 600;
    color: var(--brand);
}

.calendar-month-chip {
    display: block;
    font-size: .72rem;
    background: color-mix(in srgb, var(--entry-color) 14%, white);
    color: var(--ink);
    border-left: 3px solid var(--entry-color);
    border-radius: 4px;
    padding: .15rem .35rem;
    margin-bottom: .2rem;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.report-canvas {
    width: min(440px, 100vw);
}

@media (max-width: 1200px) {
    .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .calendar-week {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .content { padding: 1rem; }
    .stat-grid { grid-template-columns: 1fr; }
    .page-title { font-size: 1.15rem; }
    .btn-report span { display: none; }
    .calendar-week {
        grid-template-columns: 1fr;
    }
    .calendar-day {
        min-height: auto;
    }
    .calendar-month-cell {
        min-height: 84px;
    }
}

@media print {
    .sidebar, .topbar, .btn, .alert, .no-print { display: none !important; }
    .main-area { width: 100%; }
    .content { padding: 0; }
    .panel { box-shadow: none; border: none; }
}