:root {
    --atlas-black: #0b0d10;
    --atlas-charcoal: #15191f;
    --atlas-surface: #ffffff;
    --atlas-background: #f4f6f8;
    --atlas-border: #d9dee5;
    --atlas-text: #1c2430;
    --atlas-text-muted: #667085;
    --atlas-gold: #c59a3d;
    --atlas-gold-dark: #9c7728;
    --atlas-gold-light: #f5ead0;
    --atlas-success: #198754;
    --atlas-warning: #d98e04;
    --atlas-danger: #c93c37;
    --atlas-info: #2878b5;
    --atlas-radius-sm: 6px;
    --atlas-radius-md: 10px;
    --atlas-radius-lg: 14px;
    --atlas-shadow-sm: 0 2px 8px rgba(16, 24, 40, 0.06);
    --atlas-shadow-md: 0 8px 24px rgba(16, 24, 40, 0.10);
}

html {
    position: relative;
    min-height: 100%;
    font-size: 14px;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

body {
    min-height: 100vh;
    margin-bottom: 60px;
    color: var(--atlas-text);
    background-color: var(--atlas-background);
    font-family: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* Links */

a {
    color: var(--atlas-gold-dark);
    text-decoration: none;
}

    a:hover {
        color: var(--atlas-gold);
    }

/* Current Atlas navigation shell */

.navbar {
    min-height: 68px;
    background: linear-gradient( 135deg, var(--atlas-black) 0%, var(--atlas-charcoal) 100% ) !important;
    border-bottom: 3px solid var(--atlas-gold) !important;
    box-shadow: var(--atlas-shadow-md);
}

.navbar-brand {
    color: #ffffff !important;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

    .navbar-brand:hover {
        color: var(--atlas-gold) !important;
    }

.navbar .nav-link {
    color: #e5e7eb !important;
    font-weight: 500;
    border-radius: var(--atlas-radius-sm);
    transition: color 0.15s ease, background-color 0.15s ease;
}

    .navbar .nav-link:hover,
    .navbar .nav-link:focus,
    .navbar .nav-link.show {
        color: #ffffff !important;
        background-color: rgba(197, 154, 61, 0.18);
    }

.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.35);
}

    .navbar-toggler:focus {
        box-shadow: 0 0 0 0.2rem rgba(197, 154, 61, 0.35);
    }

.navbar-toggler-icon {
    filter: invert(1);
}

.dropdown-menu {
    padding: 0.5rem;
    border: 1px solid var(--atlas-border);
    border-radius: var(--atlas-radius-md);
    box-shadow: var(--atlas-shadow-md);
}

.dropdown-item {
    padding: 0.55rem 0.75rem;
    color: var(--atlas-text);
    border-radius: var(--atlas-radius-sm);
}

    .dropdown-item:hover,
    .dropdown-item:focus {
        color: var(--atlas-black);
        background-color: var(--atlas-gold-light);
    }

.dropdown-header {
    color: var(--atlas-gold-dark);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.dropdown-divider {
    border-color: var(--atlas-border);
}

/* Main page content */

body > .container,
body > div.container {
    max-width: 1440px;
    padding-top: 1rem;
    padding-right: 1.25rem;
    padding-left: 1.25rem;
}

main {
    min-height: calc(100vh - 170px);
}

/* Page headings */

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--atlas-text);
    font-weight: 700;
}

h1 {
    margin-bottom: 1.25rem;
    font-size: clamp(1.75rem, 2.5vw, 2.35rem);
    letter-spacing: -0.025em;
}

/* Cards */

.card {
    border: 1px solid var(--atlas-border);
    border-radius: var(--atlas-radius-lg);
    box-shadow: var(--atlas-shadow-sm);
}

.card-header {
    color: var(--atlas-text);
    background-color: #ffffff;
    border-bottom: 1px solid var(--atlas-border);
    font-weight: 700;
}

.card-footer {
    background-color: #fafbfc;
    border-top: 1px solid var(--atlas-border);
}

/* Buttons */

.btn {
    border-radius: var(--atlas-radius-sm);
    font-weight: 600;
}

.btn-primary {
    color: #ffffff;
    background-color: var(--atlas-black);
    border-color: var(--atlas-black);
}

    .btn-primary:hover,
    .btn-primary:focus {
        color: #ffffff;
        background-color: var(--atlas-charcoal);
        border-color: var(--atlas-gold);
    }

.btn-outline-primary {
    color: var(--atlas-black);
    border-color: var(--atlas-black);
}

    .btn-outline-primary:hover,
    .btn-outline-primary:focus {
        color: #ffffff;
        background-color: var(--atlas-black);
        border-color: var(--atlas-black);
    }

.btn-warning {
    color: var(--atlas-black);
    background-color: var(--atlas-gold);
    border-color: var(--atlas-gold);
}

    .btn-warning:hover,
    .btn-warning:focus {
        color: var(--atlas-black);
        background-color: #d7ad50;
        border-color: #d7ad50;
    }

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: var(--atlas-gold);
    box-shadow: 0 0 0 0.2rem rgba(197, 154, 61, 0.25);
}

/* Forms */

.form-control,
.form-select {
    min-height: 42px;
    border-color: var(--atlas-border);
    border-radius: var(--atlas-radius-sm);
}

    .form-control:focus,
    .form-select:focus {
        border-color: var(--atlas-gold);
    }

.form-label {
    color: var(--atlas-text);
    font-weight: 600;
}

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* Tables */

.table {
    margin-bottom: 0;
    color: var(--atlas-text);
    background-color: #ffffff;
}

    .table thead th {
        color: #ffffff;
        background-color: var(--atlas-charcoal);
        border-color: var(--atlas-charcoal);
        font-size: 0.82rem;
        font-weight: 700;
        letter-spacing: 0.025em;
        text-transform: uppercase;
        vertical-align: middle;
    }

    .table tbody td {
        vertical-align: middle;
    }

.table-hover tbody tr:hover {
    background-color: var(--atlas-gold-light);
}

/* Badges and alerts */

.badge {
    padding: 0.45em 0.65em;
    border-radius: 999px;
    font-weight: 700;
}

.alert {
    border-radius: var(--atlas-radius-md);
    box-shadow: var(--atlas-shadow-sm);
}

/* Validation */

.validation-summary-valid {
    display: none;
}

.field-validation-error,
.validation-summary-errors {
    color: var(--atlas-danger);
}

/* Footer */

.footer {
    background-color: #ffffff;
    border-top: 1px solid var(--atlas-border) !important;
}

    .footer .container {
        padding-top: 1rem;
        padding-bottom: 1rem;
    }

/* Accessibility */

:focus-visible {
    outline: 3px solid rgba(197, 154, 61, 0.55);
    outline-offset: 2px;
}

/* Responsive adjustments */

@media (max-width: 1199.98px) {
    .navbar-collapse {
        margin-top: 0.75rem;
        padding: 0.75rem;
        background-color: var(--atlas-charcoal);
        border-radius: var(--atlas-radius-md);
    }

    .navbar .dropdown-menu {
        border: 0;
        box-shadow: none;
    }
}
/* =========================================================
   ATLAS APPLICATION SHELL
   Permanent sidebar and hero-bar visual system
   ========================================================= */

body {
    margin-bottom: 0;
}

/* Overall application structure */

.atlas-app-shell {
    display: flex;
    min-height: 100vh;
    background-color: var(--atlas-background);
}

.atlas-main-column {
    display: flex;
    flex: 1;
    flex-direction: column;
    min-width: 0;
    min-height: 100vh;
}

/* Sidebar */

.atlas-sidebar {
    position: sticky;
    top: 0;
    z-index: 1030;
    display: flex;
    flex: 0 0 288px;
    flex-direction: column;
    width: 288px;
    height: 100vh;
    overflow-y: auto;
    color: #ffffff;
    background: linear-gradient( 180deg, #0b0d10 0%, #15191f 65%, #101318 100% );
    border-right: 1px solid rgba(197, 154, 61, 0.45);
    box-shadow: 8px 0 28px rgba(16, 24, 40, 0.10);
    transition: width 0.2s ease, flex-basis 0.2s ease, transform 0.2s ease;
}

.atlas-sidebar-brand {
    padding: 1.15rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

    .atlas-sidebar-brand > a {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        color: #ffffff;
    }

        .atlas-sidebar-brand > a:hover {
            color: #ffffff;
        }

.atlas-brand-mark {
    display: inline-flex;
    flex: 0 0 42px;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    color: var(--atlas-black);
    background: linear-gradient( 145deg, #e4bd64 0%, var(--atlas-gold) 55%, var(--atlas-gold-dark) 100% );
    border: 1px solid #e9c978;
    border-radius: 10px;
    box-shadow: 0 5px 14px rgba(197, 154, 61, 0.22);
    font-size: 1.25rem;
    font-weight: 800;
}

.atlas-brand-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

    .atlas-brand-text strong {
        color: #ffffff;
        font-size: 1.06rem;
        line-height: 1.2;
        letter-spacing: 0.025em;
    }

    .atlas-brand-text small {
        margin-top: 0.18rem;
        color: var(--atlas-gold);
        font-size: 0.65rem;
        letter-spacing: 0.045em;
        text-transform: uppercase;
    }

/* Sidebar navigation */

.atlas-sidebar-navigation {
    flex: 1;
    padding: 0.85rem 0.7rem 1rem;
}

.atlas-sidebar-link,
.atlas-nav-group summary {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 0.65rem 0.75rem;
    color: #e8eaed;
    border-radius: var(--atlas-radius-sm);
    font-size: 0.91rem;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.atlas-sidebar-link {
    gap: 0.65rem;
    margin-bottom: 0.35rem;
}

    .atlas-sidebar-link:hover,
    .atlas-sidebar-link:focus,
    .atlas-nav-group summary:hover,
    .atlas-nav-group summary:focus {
        color: #ffffff;
        background-color: rgba(197, 154, 61, 0.16);
    }

.atlas-nav-symbol {
    display: inline-flex;
    flex: 0 0 28px;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: var(--atlas-gold);
    background-color: rgba(197, 154, 61, 0.12);
    border: 1px solid rgba(197, 154, 61, 0.28);
    border-radius: 7px;
    font-size: 0.75rem;
    font-weight: 800;
}

.atlas-nav-group {
    margin-bottom: 0.3rem;
}

    .atlas-nav-group summary {
        justify-content: space-between;
        list-style: none;
    }

        .atlas-nav-group summary::-webkit-details-marker {
            display: none;
        }

.atlas-nav-chevron {
    color: var(--atlas-gold);
    font-size: 1.35rem;
    line-height: 1;
    transform: rotate(0deg);
    transition: transform 0.15s ease;
}

.atlas-nav-group[open] .atlas-nav-chevron {
    transform: rotate(90deg);
}

.atlas-nav-group-items {
    margin: 0.15rem 0 0.5rem 0.75rem;
    padding-left: 0.75rem;
    border-left: 1px solid rgba(197, 154, 61, 0.28);
}

    .atlas-nav-group-items a {
        display: block;
        padding: 0.52rem 0.65rem;
        color: #bfc5ce;
        border-radius: var(--atlas-radius-sm);
        font-size: 0.84rem;
        font-weight: 500;
    }

        .atlas-nav-group-items a:hover,
        .atlas-nav-group-items a:focus {
            color: #ffffff;
            background-color: rgba(255, 255, 255, 0.07);
        }

.atlas-nav-section-label {
    display: block;
    padding: 0.7rem 0.65rem 0.25rem;
    color: var(--atlas-gold);
    font-size: 0.66rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.atlas-sidebar-footer {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.2rem 1.25rem;
    color: #9299a3;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

    .atlas-sidebar-footer strong {
        margin-top: 0.15rem;
        color: var(--atlas-gold);
        font-size: 0.72rem;
    }

/* Hero and action bar */

.atlas-hero-bar {
    position: sticky;
    top: 0;
    z-index: 1020;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    padding: 0.75rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--atlas-border);
    box-shadow: var(--atlas-shadow-sm);
    backdrop-filter: blur(10px);
}

.atlas-hero-left,
.atlas-hero-actions {
    display: flex;
    align-items: center;
}

.atlas-hero-left {
    min-width: 0;
    gap: 0.9rem;
}

.atlas-hero-actions {
    gap: 0.65rem;
}

.atlas-sidebar-toggle {
    display: inline-flex;
    flex: 0 0 42px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    gap: 4px;
    color: var(--atlas-text);
    background-color: #ffffff;
    border: 1px solid var(--atlas-border);
    border-radius: var(--atlas-radius-sm);
}

    .atlas-sidebar-toggle:hover {
        background-color: var(--atlas-gold-light);
        border-color: var(--atlas-gold);
    }

    .atlas-sidebar-toggle span {
        display: block;
        width: 18px;
        height: 2px;
        background-color: currentColor;
        border-radius: 2px;
    }

.atlas-page-context {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

    .atlas-page-context small {
        color: var(--atlas-gold-dark);
        font-size: 0.66rem;
        font-weight: 800;
        letter-spacing: 0.09em;
        text-transform: uppercase;
    }

    .atlas-page-context strong {
        overflow: hidden;
        color: var(--atlas-text);
        font-size: 1.05rem;
        line-height: 1.25;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

.atlas-hero-button,
.atlas-notification-link,
.atlas-account-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0.5rem 0.8rem;
    border-radius: var(--atlas-radius-sm);
    font-size: 0.82rem;
    font-weight: 700;
}

.atlas-hero-button {
    color: var(--atlas-text);
    background-color: #ffffff;
    border: 1px solid var(--atlas-border);
}

    .atlas-hero-button:hover {
        color: var(--atlas-black);
        background-color: var(--atlas-gold-light);
        border-color: var(--atlas-gold);
    }

.atlas-hero-button-primary {
    color: var(--atlas-black);
    background-color: var(--atlas-gold);
    border-color: var(--atlas-gold);
}

    .atlas-hero-button-primary:hover {
        color: var(--atlas-black);
        background-color: #d8af54;
    }

.atlas-notification-link {
    color: var(--atlas-text);
}

    .atlas-notification-link:hover {
        color: var(--atlas-gold-dark);
        background-color: var(--atlas-gold-light);
    }

.atlas-account-button {
    gap: 0.55rem;
    color: var(--atlas-text);
    background-color: #ffffff;
    border: 1px solid var(--atlas-border);
}

    .atlas-account-button:hover,
    .atlas-account-button:focus {
        background-color: #faf8f2;
        border-color: var(--atlas-gold);
    }

.atlas-account-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: #ffffff;
    background-color: var(--atlas-charcoal);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 800;
}

/* Main content */

.atlas-content-wrapper {
    flex: 1;
    width: 100%;
    max-width: 1600px;
    margin-right: auto;
    margin-left: auto;
    padding: 1.75rem 1.5rem 2.5rem;
}

.atlas-main-content {
    min-height: calc(100vh - 180px);
}

/* Footer */

.atlas-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0.75rem 1.5rem;
    gap: 1rem;
    color: var(--atlas-text-muted);
    background-color: #ffffff;
    border-top: 1px solid var(--atlas-border);
    font-size: 0.78rem;
}

/* Collapsed desktop sidebar */

.atlas-sidebar-collapsed .atlas-sidebar {
    flex-basis: 0;
    width: 0;
    overflow: hidden;
    border-right: 0;
    transform: translateX(-100%);
}

/* Public and unauthenticated shell */

.atlas-public-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--atlas-background);
}

.atlas-public-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    padding: 0.85rem 1.5rem;
    background-color: var(--atlas-black);
    border-bottom: 3px solid var(--atlas-gold);
}

.atlas-public-brand {
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.025em;
}

    .atlas-public-brand:hover {
        color: var(--atlas-gold);
    }

.atlas-public-content {
    flex: 1;
    width: 100%;
    max-width: 1440px;
    margin-right: auto;
    margin-left: auto;
    padding: 2rem 1.5rem;
}

/* Tablet and mobile behavior */

@media (max-width: 1199.98px) {
    .atlas-sidebar {
        flex-basis: 250px;
        width: 250px;
    }

    .atlas-hero-button {
        display: none;
    }
}

@media (max-width: 767.98px) {
    .atlas-app-shell {
        display: block;
    }

    .atlas-sidebar {
        position: relative;
        width: 100%;
        height: auto;
        max-height: 52vh;
        border-right: 0;
        border-bottom: 2px solid var(--atlas-gold);
    }

    .atlas-sidebar-collapsed .atlas-sidebar {
        display: none;
    }

    .atlas-hero-bar {
        min-height: 64px;
        padding: 0.65rem 0.85rem;
    }

    .atlas-page-context small,
    .atlas-notification-link,
    .atlas-account-name {
        display: none;
    }

    .atlas-hero-actions {
        gap: 0.35rem;
    }

    .atlas-content-wrapper {
        padding: 1.25rem 0.85rem 2rem;
    }

    .atlas-footer {
        flex-wrap: wrap;
        gap: 0.4rem 0.8rem;
        text-align: center;
    }
}