:root {
    --brand-primary: #2d4468;
    --brand-primary-dark: #1e2f49;
    --brand-accent: #3b82a0;
    --brand-bg: #f4f6f9;
    --brand-border: #e3e7ee;
    --brand-text: #1f2937;
    --brand-text-muted: #6b7280;
}

body {
    background-color: var(--brand-bg);
    color: var(--brand-text);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--brand-primary-dark);
    font-weight: 600;
}

a {
    color: var(--brand-accent);
}

/* --- Navbar: identidad propia en vez del bg-dark genérico --- */
.navbar.app-navbar {
    background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
    box-shadow: 0 2px 8px rgba(0, 0, 0, .12);
}

.app-navbar .navbar-brand {
    font-weight: 700;
    letter-spacing: .02em;
}

.app-navbar .nav-link {
    opacity: .88;
    transition: opacity .15s ease;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link:focus {
    opacity: 1;
}

/* --- Botones y foco --- */
.btn-primary {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--brand-primary-dark);
    border-color: var(--brand-primary-dark);
}

.btn:focus-visible,
.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 .2rem rgba(45, 68, 104, .25);
}

/* --- Tarjetas --- */
.card {
    border: 1px solid var(--brand-border);
    border-radius: .7rem;
    box-shadow: 0 1px 2px rgba(16, 24, 40, .04);
}

.stat-card {
    border-radius: .75rem;
    transition: transform .15s ease, box-shadow .15s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 24, 40, .08);
}

.version-card {
    border-radius: .6rem;
    background: #fbfcfe;
}

/* --- Estados vacíos --- */
.empty-state {
    text-align: center;
    color: var(--brand-text-muted);
    padding: 3.5rem 1.5rem;
    background: #fff;
    border: 1px dashed var(--brand-border);
    border-radius: .75rem;
}

.empty-state .bi {
    font-size: 2.2rem;
    color: var(--brand-border);
    display: block;
    margin-bottom: .75rem;
}

/* --- Login --- */
.auth-card {
    border-radius: 1rem;
    box-shadow: 0 12px 32px rgba(16, 24, 40, .1);
}

.auth-brand {
    color: var(--brand-primary-dark);
    font-weight: 700;
}

/* --- Flujo de aprobación --- */
.step-list {
    list-style: none;
    padding-left: 0;
}

.step-list li {
    border-left: 3px solid var(--brand-border);
    padding: .5rem .75rem;
    margin-bottom: .5rem;
    border-radius: 0 .4rem .4rem 0;
    background: #fbfcfe;
}

.step-list li.step-current {
    border-left-color: var(--brand-accent);
    background: #eef4f7;
}

/* --- Visor de arte --- */
.viewer-scroll {
    max-height: 75vh;
    overflow: auto;
    padding: .5rem;
    border-radius: .6rem;
}

.viewer-wrap {
    cursor: crosshair;
    touch-action: none;
}

.viewer-wrap.panning {
    cursor: grabbing;
}

.viewer-media {
    max-width: 100%;
    height: auto;
    display: block;
}

.pin-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.pin {
    position: absolute;
    transform: translate(-50%, -50%);
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 50%;
    background: #dc3545;
    color: #fff;
    font-size: .75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    pointer-events: auto;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

.pin.pin-resolved {
    background: #198754;
}

.pin.pin-pending {
    background: var(--brand-accent);
    opacity: .9;
}

.notification-dropdown {
    max-height: 400px;
    overflow-y: auto;
    min-width: 320px;
}