/* ============================================================
   SISTEMA ÑACHEC — estilos.css (global)
   Layout, header, sidebar, modo oscuro, mensajes, modal, utilidades base.
   NADA de formularios de usuarios ni listados.
   ============================================================ */

/* ── RESET Y VARIABLES ── */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #F4F7FB;
    --color-surface: #FFFFFF;
    --color-surface-2: #F8FAFE;
    --color-border: #E4E9F2;
    --color-text: #1F2A44;
    --color-text-light: #5A6A85;
    --color-primary: #0A2A42;
    --color-primary-dark: #051A2A;
    --color-primary-light: #EFF3F8;
    --color-accent: #C67B3D;
    --color-accent-hover: #A8622D;
    --color-accent-light: #FDF5EE;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.02);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.02);
    --radius: 0.75rem;
    --radius-sm: 0.5rem;
    --transition: all 0.2s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

body.modo-oscuro {
    --color-bg: #0F1725;
    --color-surface: #1A2538;
    --color-surface-2: #111C2C;
    --color-border: #2D3A4E;
    --color-text: #EFF3F8;
    --color-text-light: #9AA9BF;
    --color-primary: #1F4A6E;
    --color-primary-dark: #0F2E46;
    --color-primary-light: #1E2F40;
    --color-accent: #E09D5E;
    --color-accent-hover: #C97B3A;
    --color-accent-light: #2E241E;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ── HEADER (azul profundo) ── */
.encabezado {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: var(--color-primary);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 200;
    display: flex;
    align-items: center;
}
.encabezado-container {
    width: 100%;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.logo-titulo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
}
.logo-img {
    width: 38px;
    height: 38px;
    object-fit: contain;
    border-radius: 12px;
    background: rgba(255,255,255,0.15);
    padding: 5px;
}
.titulo-sistema {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: white;
    white-space: nowrap;
}
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.menu-toggle:hover {
    background: rgba(255,255,255,0.1);
}
.login-btn .login-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    background: white;
    color: var(--color-primary);
    transition: var(--transition);
}
.login-btn .login-link:hover {
    background: rgba(255,255,255,0.9);
}
.login-btn button.login-link {
    border: none;
    cursor: pointer;
    font-family: inherit;
}

/* ── SIDEBAR ── */
.barra-nav {
    position: fixed;
    top: 70px;
    left: 0;
    width: 260px;
    height: calc(100vh - 70px);
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    z-index: 150;
    transition: transform 0.3s ease;
}
.nav-container {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 1.5rem 1rem;
}
.nav-btn,
.nav-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition);
    background: none;
    border: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
    font-family: inherit;
}
.nav-btn:hover,
.nav-dropdown-btn:hover {
    background: var(--color-surface-2);
    color: var(--color-text);
}
.nav-btn.disabled {
    opacity: 0.5;
    pointer-events: none;
}
.nav-dropdown-content {
    display: none;
    flex-direction: column;
    margin-left: 1.8rem;
    padding-left: 0.75rem;
    border-left: 1px solid var(--color-border);
}
.dropdown-item {
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    color: var(--color-text-light);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.dropdown-item:hover {
    background: var(--color-surface-2);
    color: var(--color-text);
}
.toggle-darkmode {
    margin-top: 1rem;
    border-top: 1px solid var(--color-border);
    border-radius: 0;
    padding-top: 1rem;
    margin-left: -1rem;
    margin-right: -1rem;
    padding-left: 1rem;
    justify-content: center;
}

/* ── CONTENIDO PRINCIPAL ── */
main.contenido {
    margin-left: 260px;
    margin-top: 70px;
    min-height: calc(100vh - 70px);
    padding: 2rem;
    background: var(--color-bg);
}
main.login-centro {
    margin-left: 0;
    margin-top: 70px;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

/* ── MENSAJES ── */
.messages {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    border-left: 4px solid;
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}
.alert-success { border-left-color: #2E7D64; color: #2E7D64; }
.alert-info { border-left-color: #3B82F6; color: #3B82F6; }
.alert-warning { border-left-color: #E9A23B; color: #B7770E; }
.alert-error, .alert-danger { border-left-color: #D95C5C; color: #B23C3C; }
body.modo-oscuro .alert-success { color: #7ABFA8; }
body.modo-oscuro .alert-info { color: #90BDFA; }
body.modo-oscuro .alert-warning { color: #F5C47A; }
body.modo-oscuro .alert-error { color: #F3A6A6; }

/* ── MODAL ── */
.modal-exportar-excel {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 500;
    align-items: center;
    justify-content: center;
}
.modal-exportar-excel.activo { display: flex; }
.modal-exportar-content {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.8rem;
    max-width: 480px;
    width: 90%;
    position: relative;
    box-shadow: var(--shadow-lg);
}
#cerrarModalExportar {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--color-text-light);
}

/* ── UTILIDADES GENERALES ── */
.btn-institucional {
    background: var(--color-accent);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.btn-institucional:hover {
    background: var(--color-accent-hover);
}
.sin-registros {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ── RESPONSIVE GLOBAL ── */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    .barra-nav {
        transform: translateX(-100%);
    }
    .barra-nav.activo {
        transform: translateX(0);
    }
    main.contenido {
        margin-left: 0;
        padding: 1rem;
    }
    .titulo-sistema {
        font-size: 0.9rem;
    }
}
@media (max-width: 480px) {
    .titulo-sistema {
        display: none;
    }
    .encabezado-container {
        padding: 0 1rem;
    }
}
/* ============================================================
   LOGIN (estilos específicos)
   ============================================================ */

.login-wrapper {
    width: 100%;
    max-width: 420px;
    margin: 0 auto;
    padding: 1rem;
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 2rem 1.8rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.login-header {
    text-align: center;
    margin-bottom: 1.8rem;
}

.login-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: white;
    font-size: 1.8rem;
    font-weight: 600;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.login-header h2 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.login-subtitle {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: 0.4rem;
}

.input-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon input {
    width: 100%;
    padding: 0.7rem 0.7rem 0.7rem 2.4rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    font-size: 0.9rem;
    transition: var(--transition);
    color: var(--color-text);
}

.input-icon input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(198,123,61,0.1);
}

/* Íconos simulados con pseudo-elementos (ya que no usas SVGs en el HTML) */
.icon-user::before,
.icon-lock::before {
    position: absolute;
    left: 12px;
    font-size: 1rem;
    color: var(--color-text-light);
    pointer-events: none;
}

.password-wrapper {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-light);
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.toggle-password:hover {
    color: var(--color-accent);
}

.btn-login {
    width: 100%;
    background: var(--color-accent);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 0.5rem;
}
.btn-login:hover {
    background: var(--color-accent-hover);
}

.errorlist.nonfield {
    background: var(--color-accent-light);
    border-left: 3px solid var(--color-accent);
    padding: 0.6rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.8rem;
    color: var(--color-accent);
}

/* Modo oscuro (las variables ya están, solo ajustes puntuales) */
body.modo-oscuro .login-card {
    background: var(--color-surface);
    border-color: var(--color-border);
}
body.modo-oscuro .input-icon input {
    background: var(--color-bg);
    border-color: var(--color-border);
    color: var(--color-text);
}
body.modo-oscuro .icon-user::before,
body.modo-oscuro .icon-lock::before {
    color: var(--color-text-light);
}