:root {
    --bg: #050816;
    --panel: rgba(10, 18, 38, 0.84);
    --panel-border: rgba(90, 160, 255, 0.22);
    --text: #f8fbff;
    --muted: #9aa7bd;
    --blue: #178bff;
    --cyan: #00d5ff;
    --purple: #9b5cff;
    --pink: #ec4fd8;
    --green: #36d97d;
    --yellow: #ffbf3c;
    --red: #ff5d6c;
    --shadow: 0 20px 70px rgba(0, 0, 0, 0.36);
    --radius: 8px;
    --sidebar: 276px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        radial-gradient(circle at 18% 8%, rgba(23, 139, 255, 0.28), transparent 32rem),
        radial-gradient(circle at 88% 16%, rgba(155, 92, 255, 0.24), transparent 34rem),
        radial-gradient(circle at 52% 86%, rgba(0, 213, 255, 0.14), transparent 38rem),
        linear-gradient(135deg, #050816 0%, #071026 48%, #090b1e 100%);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(rgba(255, 255, 255, 0.026) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.024) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 86%);
}

a {
    color: var(--cyan);
    text-decoration: none;
}

a:hover {
    color: var(--text);
}

button,
input,
select,
textarea {
    font: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.app-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.app-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(115deg, transparent 0 48%, rgba(0, 213, 255, 0.08) 49%, transparent 50% 100%);
}

.sidebar {
    position: fixed;
    inset: 18px auto 18px 18px;
    z-index: 20;
    width: calc(var(--sidebar) - 36px);
    display: flex;
    flex-direction: column;
    padding: 18px;
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    background: rgba(5, 9, 24, 0.82);
    box-shadow: var(--shadow);
    backdrop-filter: blur(22px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
}

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

.brand-mark {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border-radius: var(--radius);
    background: linear-gradient(135deg, var(--blue), var(--cyan) 52%, var(--purple));
    color: white;
    font-weight: 900;
    box-shadow: 0 0 32px rgba(0, 213, 255, 0.36);
}

.brand strong {
    display: block;
    font-size: 1.15rem;
}

.brand small {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    margin-top: 2px;
}

.side-nav {
    display: grid;
    gap: 8px;
    margin-top: 30px;
}

.side-nav a,
.mobile-nav a {
    color: var(--muted);
}

.side-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    transition: 160ms ease;
}

.side-nav a span,
.mobile-nav a span {
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    border-radius: 7px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--cyan);
    font-size: 0.78rem;
    font-weight: 800;
}

.side-nav a:hover,
.side-nav a.active {
    color: var(--text);
    border-color: rgba(0, 213, 255, 0.28);
    background: linear-gradient(135deg, rgba(23, 139, 255, 0.16), rgba(155, 92, 255, 0.12));
}

.sidebar-user {
    margin-top: auto;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-size: 0.92rem;
}

.main-content {
    position: relative;
    z-index: 5;
    margin-left: var(--sidebar);
    padding: 28px 28px 46px 12px;
}

.content-wrap {
    width: min(1480px, 100%);
    margin: 0 auto;
}

.auth-content {
    position: relative;
    z-index: 5;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-wrap {
    width: min(460px, 100%);
}

.auth-card,
.panel,
.metric-card,
.payment-card,
.danger-zone {
    border: 1px solid var(--panel-border);
    border-radius: var(--radius);
    background: var(--panel);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.auth-card {
    padding: 28px;
}

.login-brand {
    margin-bottom: 30px;
}

.auth-heading h1,
.page-heading h1,
.panel-heading h2,
.payment-summary h2 {
    margin: 0;
    line-height: 1.05;
}

.auth-heading h1 {
    font-size: clamp(2rem, 7vw, 3.2rem);
}

.auth-heading p:not(.eyebrow),
.muted,
.empty-state,
small {
    color: var(--muted);
}

.page-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 22px;
}

.page-heading h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
}

.heading-actions,
.form-actions,
.filter-actions,
.file-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.eyebrow {
    margin: 0 0 6px;
    color: var(--cyan);
    font-size: 0.76rem;
    font-weight: 800;
    text-transform: uppercase;
}

.flash {
    margin-bottom: 14px;
    padding: 13px 15px;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.08);
}

.flash-success {
    border-color: rgba(54, 217, 125, 0.42);
    color: #dfffea;
}

.flash-error {
    border-color: rgba(255, 93, 108, 0.46);
    color: #ffe1e6;
}

.flash-warning {
    border-color: rgba(255, 191, 60, 0.46);
    color: #fff4d6;
}

.btn {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    color: var(--text);
    cursor: pointer;
    font-weight: 800;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.btn:hover {
    transform: translateY(-1px);
    color: var(--text);
}

.btn.primary {
    background: linear-gradient(135deg, var(--blue), var(--cyan) 54%, var(--purple));
    box-shadow: 0 14px 42px rgba(23, 139, 255, 0.28);
}

.btn.secondary,
.ghost-link {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
}

.btn.danger {
    background: rgba(255, 93, 108, 0.14);
    border-color: rgba(255, 93, 108, 0.42);
    color: #ffdce1;
}

.btn.wide {
    width: 100%;
}

.small-btn {
    min-height: 34px;
    padding: 7px 10px;
    font-size: 0.86rem;
}

.ghost-link {
    padding: 8px 12px;
    border-radius: var(--radius);
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.metric-card {
    min-height: 150px;
    padding: 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
    position: relative;
}

.metric-card::after {
    content: "";
    position: absolute;
    inset: auto -20% -55% 20%;
    height: 90px;
    background: linear-gradient(90deg, rgba(0, 213, 255, 0.16), rgba(236, 79, 216, 0.16));
    filter: blur(22px);
}

.metric-card.electric {
    border-color: rgba(0, 213, 255, 0.38);
}

.metric-card.violet {
    border-color: rgba(155, 92, 255, 0.38);
}

.metric-card span,
.metric-card small,
.calc-card span,
.file-panel > span,
label span {
    color: var(--muted);
}

.metric-card strong {
    display: block;
    margin: 12px 0;
    font-size: clamp(1.45rem, 2.4vw, 2.15rem);
    line-height: 1.05;
    position: relative;
    z-index: 1;
}

.panel,
.danger-zone {
    padding: 18px;
}

.panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.panel-heading h2 {
    font-size: 1.25rem;
}

.dashboard-grid,
.chart-grid,
.split-grid {
    display: grid;
    gap: 18px;
    margin-bottom: 18px;
}

.dashboard-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(420px, 0.85fr);
}

.chart-grid,
.split-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.reading-detail {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(220px, 0.9fr);
    gap: 18px;
    align-items: start;
}

dl,
.summary-facts {
    margin: 0;
}

.reading-detail dl,
.summary-facts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.reading-detail dl div,
.summary-facts div {
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.045);
}

dt {
    color: var(--muted);
    font-size: 0.78rem;
}

dd {
    margin: 4px 0 0;
    font-weight: 800;
}

.photo-preview {
    display: block;
    border: 1px solid rgba(0, 213, 255, 0.22);
    border-radius: var(--radius);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
}

.photo-preview img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.photo-preview.small {
    width: min(260px, 100%);
    margin: 10px 0;
}

.photo-empty,
.empty-state {
    padding: 16px;
    border: 1px dashed rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.035);
}

.table-wrap {
    width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 820px;
}

th,
td {
    padding: 12px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    text-align: left;
    vertical-align: middle;
    white-space: nowrap;
}

th {
    color: var(--muted);
    font-size: 0.78rem;
    text-transform: uppercase;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.025);
}

.compact-table table {
    min-width: 680px;
}

.badge {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 5px 9px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 900;
    white-space: nowrap;
}

.badge.status-paid {
    background: rgba(54, 217, 125, 0.15);
    border: 1px solid rgba(54, 217, 125, 0.42);
    color: #bfffd7;
}

.badge.status-unpaid {
    background: rgba(255, 191, 60, 0.14);
    border: 1px solid rgba(255, 191, 60, 0.42);
    color: #ffe6aa;
}

.badge.status-validation {
    background: rgba(0, 213, 255, 0.13);
    border: 1px solid rgba(0, 213, 255, 0.42);
    color: #c8f7ff;
}

.form-stack,
.form-grid,
.filter-grid,
.payment-fields {
    display: grid;
    gap: 14px;
}

.form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.filter-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    align-items: end;
    margin-bottom: 18px;
}

.filter-actions {
    align-self: end;
}

label {
    display: grid;
    gap: 7px;
}

label span {
    font-size: 0.88rem;
    font-weight: 750;
}

input,
select,
textarea {
    width: 100%;
    min-height: 46px;
    border: 1px solid rgba(154, 167, 189, 0.24);
    border-radius: var(--radius);
    background: rgba(3, 8, 22, 0.7);
    color: var(--text);
    padding: 11px 12px;
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

textarea {
    resize: vertical;
    line-height: 1.45;
}

input:focus,
select:focus,
textarea:focus {
    border-color: rgba(0, 213, 255, 0.7);
    box-shadow: 0 0 0 3px rgba(0, 213, 255, 0.16);
    background: rgba(4, 12, 32, 0.9);
}

input[readonly] {
    color: #c8d4e8;
    background: rgba(255, 255, 255, 0.045);
}

input[type="file"] {
    padding: 9px;
}

.full {
    grid-column: 1 / -1;
}

.sub-heading {
    margin-top: 8px;
}

.calc-card,
.file-panel {
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.045);
}

.calc-card strong {
    display: block;
    margin-top: 8px;
    font-size: 1.55rem;
}

.checkbox-line {
    display: flex;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 8px;
    margin: 8px 0;
    color: var(--muted);
}

.checkbox-line.inline {
    width: auto;
}

.checkbox-line input {
    width: 18px;
    min-height: 18px;
}

.payment-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.payment-card {
    padding: 16px;
    display: grid;
    gap: 14px;
}

.payment-summary {
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.payment-summary h2 {
    margin-top: 2px;
    font-size: 1.65rem;
}

.payment-summary span:not(.badge) {
    color: var(--muted);
}

.payment-fields {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.row-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.row-actions form {
    display: inline;
}

.row-actions button {
    border: 0;
    padding: 0;
    background: none;
    color: var(--red);
    cursor: pointer;
    font-weight: 800;
}

.bar-chart {
    height: 260px;
    display: grid;
    grid-template-columns: repeat(12, minmax(34px, 1fr));
    align-items: end;
    gap: 10px;
    padding-top: 8px;
}

.bar-item {
    min-width: 0;
    height: 100%;
    display: grid;
    grid-template-rows: 24px 1fr 24px;
    align-items: end;
    gap: 7px;
}

.bar-value,
.bar-label {
    color: var(--muted);
    font-size: 0.72rem;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bar-track {
    position: relative;
    height: 100%;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    overflow: hidden;
}

.bar-track span {
    position: absolute;
    inset: auto 0 0;
    border-radius: 999px 999px 0 0;
    background: linear-gradient(180deg, var(--cyan), var(--blue) 48%, var(--purple));
    box-shadow: 0 0 24px rgba(0, 213, 255, 0.34);
}

.inline-filter {
    display: flex;
    align-items: end;
    gap: 12px;
}

.inline-filter label {
    min-width: 180px;
}

.summary-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.65fr);
    gap: 18px;
}

.summary-preview textarea {
    min-height: 330px;
    margin-bottom: 12px;
    font-size: 1rem;
}

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

.danger-zone {
    margin-top: 18px;
    display: flex;
    justify-content: flex-end;
    background: rgba(255, 93, 108, 0.08);
    border-color: rgba(255, 93, 108, 0.26);
}

.mobile-header,
.mobile-nav {
    display: none;
}

@media (max-width: 1280px) {
    .metric-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .dashboard-grid,
    .chart-grid,
    .split-grid,
    .summary-layout {
        grid-template-columns: 1fr;
    }

    .payment-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 920px) {
    .sidebar {
        display: none;
    }

    .mobile-header {
        position: sticky;
        top: 0;
        z-index: 30;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 16px;
        border-bottom: 1px solid var(--panel-border);
        background: rgba(5, 9, 24, 0.86);
        backdrop-filter: blur(18px);
    }

    .brand.compact .brand-mark {
        width: 36px;
        height: 36px;
    }

    .main-content {
        margin-left: 0;
        padding: 18px 14px 112px;
    }

    .mobile-nav {
        position: fixed;
        inset: auto 10px 10px;
        z-index: 40;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 4px;
        padding: 8px;
        border: 1px solid var(--panel-border);
        border-radius: var(--radius);
        background: rgba(5, 9, 24, 0.92);
        box-shadow: var(--shadow);
        backdrop-filter: blur(18px);
    }

    .mobile-nav a {
        min-width: 0;
        display: grid;
        justify-items: center;
        gap: 4px;
        padding: 7px 2px;
        border-radius: 7px;
        font-size: 0.72rem;
        font-weight: 800;
    }

    .mobile-nav a.active {
        color: var(--text);
        background: rgba(0, 213, 255, 0.12);
    }

    .mobile-nav a span {
        width: 24px;
        height: 24px;
        font-size: 0.7rem;
    }

    .page-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .metric-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .form-grid,
    .filter-grid,
    .payment-fields,
    .reading-detail,
    .reading-detail dl {
        grid-template-columns: 1fr;
    }

    .filter-grid {
        align-items: stretch;
    }

    .filter-actions,
    .form-actions {
        width: 100%;
    }

    .filter-actions .btn,
    .form-actions .btn,
    .form-actions button {
        flex: 1;
    }

    .bar-chart {
        overflow-x: auto;
        padding-bottom: 6px;
    }
}

@media (max-width: 560px) {
    .auth-content {
        padding: 14px;
    }

    .auth-card,
    .panel,
    .metric-card,
    .payment-card {
        padding: 14px;
    }

    .metric-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .metric-card {
        min-height: 132px;
    }

    .metric-card strong {
        font-size: 1.28rem;
        word-break: break-word;
    }

    .page-heading h1 {
        font-size: 2rem;
    }

    .panel-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .heading-actions {
        width: 100%;
    }

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

    .bar-chart {
        grid-template-columns: repeat(12, minmax(38px, 1fr));
        gap: 8px;
    }
}