:root {
    /* Paleta Oficial */
    --c-darkest: #081426;
    --c-navy: #142a44;
    --c-blue: #4a74a7;
    --c-light-blue: #dceaf7;
    --c-bg: #f2f5f9;
    --c-surface: #ffffff;
    --c-text-primary: #0b1320;
    --c-text-muted: #536479;
    --c-border: #dde4ed;

    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;

    /* Sombras y elevación */
    --shadow-sm: 0 2px 4px rgba(8, 20, 38, 0.04);
    --shadow-card: 0 4px 14px -2px rgba(8, 20, 38, 0.05), 0 2px 6px -1px rgba(8, 20, 38, 0.03);
    --shadow-hover: 0 12px 24px -4px rgba(20, 42, 68, 0.12), 0 4px 8px -2px rgba(8, 20, 38, 0.04);
    --shadow-modal: 0 25px 50px -12px rgba(8, 20, 38, 0.35);

    --transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    --layout-max-width: 1280px;
    --layout-padding: 1.5rem;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--c-bg);
    color: var(--c-text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    user-select: none;
    /* Deshabilita selección accidental de texto en el sistema */
}

/* Header alineado con la retícula del contenido */
.app-header {
    background: linear-gradient(135deg, var(--c-darkest) 0%, var(--c-navy) 100%);
    color: #fff;
    padding: 1.1rem 0;
    box-shadow: 0 4px 20px rgba(8, 20, 38, 0.15);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-container {
    max-width: var(--layout-max-width);
    margin: 0 auto;
    padding: 0 var(--layout-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.brand:hover {
    transform: scale(1.01);
}

.brand-icon {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    color: var(--c-light-blue);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.brand-text h1 {
    font-size: 1.18rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: #fff;
    line-height: 1.2;
}

.brand-text p {
    font-size: 0.78rem;
    color: var(--c-light-blue);
    opacity: 0.85;
}

.header-tools {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.25rem;
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: #fff;
    background-color: rgba(255, 255, 255, 0.12);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.status-dot {
    width: 7px;
    height: 7px;
    background-color: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 8px #22c55e;
}

.current-date {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
}

/* Botones con profundidad y micro-rebote */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.6rem 1.1rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    user-select: none;
    white-space: nowrap;
}

.btn:active {
    transform: translateY(1px) scale(0.98);
}

.btn-primary {
    background: linear-gradient(180deg, #1d395c 0%, var(--c-navy) 100%);
    color: #fff;
    box-shadow: 0 2px 6px rgba(20, 42, 68, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(180deg, #25466f 0%, #173252 100%);
    box-shadow: 0 4px 12px rgba(20, 42, 68, 0.3);
}

.btn-accent {
    background-color: var(--c-blue);
    color: #fff;
}

.btn-accent:hover {
    background-color: #3d6391;
}

.btn-outline {
    background-color: #fff;
    border-color: var(--c-border);
    color: var(--c-navy);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    background-color: var(--c-light-blue);
    border-color: var(--c-blue);
    color: var(--c-darkest);
}

.btn-ghost {
    background: #ffffff;
    color: var(--c-text-muted);
    border: 1px solid var(--c-border);
    box-shadow: 0 1px 2px rgba(8, 20, 38, 0.03);
}

.btn-ghost:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
    color: var(--c-navy);
    transform: translateY(-1px);
}

.btn-ghost:active {
    transform: translateY(0) scale(0.98);
}

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
}

.btn-block {
    width: 100%;
}

.hidden {
    display: none !important;
}

.mobile-only {
    display: none;
}