:root {
    --bg: #f6f8fc;
    --bg-alt: #eef3ff;
    --panel: #ffffff;
    --text: #1a2340;
    --muted: #6a7390;
    --line: #dbe3f2;
    --primary: #1f5eff;
    --primary-strong: #1543c7;
    --danger: #d0374f;
    --danger-strong: #aa243a;
    --radius: 14px;
    --shadow: 0 10px 24px rgba(28, 46, 94, 0.08);
}

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

body {
    margin: 0;
    font-family: "Sora", "Poppins", "Trebuchet MS", sans-serif;
    color: var(--text);
    background:
        radial-gradient(900px 400px at -10% -20%, #dce8ff 0%, transparent 55%),
        radial-gradient(700px 300px at 120% 0%, #e4f0ff 0%, transparent 50%),
        var(--bg);
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 264px 1fr;
}

.sidebar {
    background: linear-gradient(170deg, #0f1f4d, #132a67);
    color: #edf2ff;
    padding: 22px 16px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    border-right: 1px solid rgba(203, 219, 255, 0.2);
    box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.06);
}

.sidebar h2 {
    margin: 0;
    padding: 10px 12px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    letter-spacing: 0.4px;
    font-size: 17px;
    font-weight: 700;
}

.sidebar .muted {
    color: #c8d3f8;
    margin: 0 2px 10px;
    font-size: 12px;
}

#main-nav {
    display: grid;
    gap: 6px;
}

.nav-btn {
    border: 1px solid transparent;
    color: #d9e4ff;
    background: transparent;
    border-radius: 10px;
    padding: 11px 12px;
    text-align: left;
    font-weight: 500;
    letter-spacing: 0.2px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.18);
    color: #ffffff;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.09);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid rgba(203, 219, 255, 0.25);
}

#logout-btn {
    width: 100%;
}

.content {
    padding: 24px;
}

.topbar {
    margin-bottom: 18px;
    display: grid;
    gap: 4px;
}

.topbar h1 {
    margin: 0;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 0.2px;
}

#global-message {
    min-height: 20px;
    font-size: 13px;
}

.view {
    display: none;
}

.view.active {
    display: block;
    animation: fadeIn 0.25s ease;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 14px;
}

.stats-grid .card {
    background: linear-gradient(180deg, #ffffff, #f9fbff);
}

.stats-grid .card p {
    margin: 10px 0 0;
    font-size: 25px;
    font-weight: 700;
    color: #16388f;
}

.dashboard-panels {
    display: grid;
    grid-template-columns: 1.25fr 1fr;
    gap: 14px;
    align-items: start;
}

.chart-card {
    min-height: 440px;
}

.chart-shell {
    position: relative;
    min-height: 360px;
}

.chart-shell canvas {
    width: 100% !important;
    height: 100% !important;
}

.card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 14px;
    box-shadow: var(--shadow);
}

.sub-card {
    margin-top: 12px;
    background: var(--bg-alt);
}

.card h3,
.card h4 {
    margin: 0 0 12px;
    font-weight: 650;
    letter-spacing: 0.2px;
}

.muted {
    color: var(--muted);
}

.table-wrap {
    overflow-x: auto;
    border-radius: 10px;
    border: 1px solid #e2e8f5;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

thead {
    background: #f6f9ff;
}

th,
td {
    border-bottom: 1px solid #e8edf8;
    padding: 11px 10px;
    text-align: left;
    font-size: 13px;
}

th {
    font-size: 12px;
    font-weight: 700;
    color: #475381;
    letter-spacing: 0.4px;
    text-transform: uppercase;
}

tr:hover td {
    background: #f9fbff;
}

.grid-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.invoice-form-grid {
    gap: 12px;
}

.invoice-filter-grid {
    margin-bottom: 12px;
}

.form-field {
    display: grid;
    gap: 6px;
}

.form-field.full-row {
    grid-column: 1 / -1;
}

.grid-form textarea {
    min-height: 84px;
}

.grid-form .actions-row,
.grid-form .card,
.grid-form button[type="submit"] {
    grid-column: 1 / -1;
}

.actions-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

label {
    font-size: 12px;
    color: var(--muted);
}

input,
textarea,
select,
button {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    font: inherit;
}

input,
textarea,
select {
    background: #fff;
    color: var(--text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #8baeff;
    box-shadow: 0 0 0 4px rgba(31, 94, 255, 0.13);
}

button {
    cursor: pointer;
    border: none;
    background: linear-gradient(180deg, var(--primary), var(--primary-strong));
    color: #fff;
    font-weight: 600;
    letter-spacing: 0.2px;
    transition: transform 0.16s ease, filter 0.16s ease;
}

button:hover {
    filter: brightness(1.04);
}

button:active {
    transform: translateY(1px);
}

button.secondary {
    background: linear-gradient(180deg, #6f7ba1, #596483);
}

button.danger {
    background: linear-gradient(180deg, var(--danger), var(--danger-strong));
}

.invoice-item-row {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr .8fr .9fr .8fr 1.4fr auto;
    gap: 10px;
    margin-bottom: 12px;
    align-items: center;
}

.invoice-item-row input,
.invoice-item-row select {
    background: #ffffff;
}

.invoice-item-row select#item-product-unit {
    min-width: 140px;
}

#invoice-items-body td:nth-child(3) {
    font-weight: 600;
    color: #26408b;
}

.hidden {
    display: none !important;
}

.login-body {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(1200px 520px at -20% -20%, #dbe8ff 0%, transparent 56%),
        radial-gradient(900px 420px at 120% 100%, #d6f2ef 0%, transparent 52%),
        #f4f7fc;
}

.login-wrap {
    width: min(430px, 94vw);
}

.login-card {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(6px);
}

.login-card h1 {
    margin: 0 0 4px;
}

#login-form {
    display: grid;
    gap: 9px;
}

.error-text {
    color: var(--danger);
    min-height: 22px;
    font-size: 13px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1160px) {
    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .dashboard-panels {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 980px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: sticky;
        top: 0;
        z-index: 4;
        border-right: none;
        border-bottom: 1px solid rgba(203, 219, 255, 0.26);
    }

    .content {
        padding: 14px;
    }

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

    .invoice-item-row {
        grid-template-columns: 1fr;
    }

    .form-field.full-row {
        grid-column: auto;
    }
}

/* Image Preview Styles */
.image-preview {
    margin-top: 8px;
    padding: 8px;
    background: #f6f9ff;
    border-radius: 8px;
    min-height: 40px;
}

.image-preview img {
    max-width: 150px;
    max-height: 100px;
    border-radius: 6px;
    border: 1px solid #e2e8f5;
}

.form-field input[type="file"] {
    padding: 6px 8px;
    font-size: 13px;
}

/* Company Settings Grid Layout */
.company-settings-grid {
    display: grid;
    grid-template-columns: 70% 30%;
    gap: 30px;
    align-items: start;
}

.company-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.company-form-grid .full-width {
    grid-column: 1 / span 2;
}

.company-left {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.company-left .form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.company-left input,
.company-left textarea {
    width: 100%;
}

.company-left button[type="submit"] {
    margin-top: 10px;
    width: 100%;
}

.company-right {
    background: #f8fafc;
    padding: 18px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.company-right .form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.company-right input[type="file"] {
    margin-bottom: 5px;
}

.upload-preview {
    background: #f1f5f9;
    border-radius: 6px;
    padding: 10px;
    text-align: center;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-preview img {
    max-width: 100%;
    border-radius: 4px;
}

@media (max-width: 900px) {
    .company-settings-grid {
        grid-template-columns: 1fr;
    }
    
    .company-form-grid {
        grid-template-columns: 1fr;
    }
}