/* ============================================
   VARIABLES (misma paleta del sitio)
============================================ */
:root {
    --color-cream: #FAF7F2;
    --color-white: #FFFFFF;
    --color-olive: #6B7B5E;
    --color-olive-light: #8A9A7D;
    --color-olive-dark: #4A5A3E;
    --color-navy: #2C3E50;
    --color-terracotta: #C17A5F;
    --color-text: #3A3A3A;
    --color-text-light: #6B6B6B;
    --color-text-muted: #999999;
    --color-border: #E8E4DE;
    --color-danger: #C0564B;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --shadow-soft: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-medium: 0 8px 30px rgba(0,0,0,0.1);
    --transition: all 0.25s ease;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-cream);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
input, select, button { font-family: inherit; }

/* ============================================
   BOTONES
============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}

.btn svg { width: 18px; height: 18px; }

.btn-primary {
    background-color: var(--color-olive);
    color: var(--color-white);
    box-shadow: var(--shadow-soft);
}
.btn-primary:hover {
    background-color: var(--color-olive-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-light);
    border: 1.5px solid var(--color-border);
}
.btn-ghost:hover {
    border-color: var(--color-olive);
    color: var(--color-olive);
}

.btn-danger-ghost {
    background-color: transparent;
    color: var(--color-danger);
    border: 1.5px solid transparent;
    padding-left: 0;
    padding-right: 0;
}
.btn-danger-ghost:hover { text-decoration: underline; }

.btn-mini {
    padding: 8px 14px;
    border-radius: 8px;
    border: 1.5px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-olive);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.btn-mini:hover { border-color: var(--color-olive); background: var(--color-cream); }

/* ============================================
   HEADER
============================================ */
.admin-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(250, 247, 242, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.admin-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-logo {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-navy);
}
.admin-logo span { color: var(--color-olive); font-size: 0.9rem; font-weight: 500; }

.admin-header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-count {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 6px 14px;
    border-radius: 50px;
}

/* ============================================
   MAIN
============================================ */
.admin-main { padding: 40px 0 80px; }

.admin-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.admin-topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 20px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.admin-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-navy);
    line-height: 1.2;
}

.admin-subtitle {
    font-size: 1rem;
    color: var(--color-text-light);
    margin-top: 4px;
}

/* ============================================
   BUSCADOR
============================================ */
.admin-search {
    position: relative;
    margin-bottom: 28px;
}
.admin-search svg {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
}
.admin-search input {
    width: 100%;
    padding: 14px 18px 14px 50px;
    border: 1.5px solid var(--color-border);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--color-white);
    color: var(--color-text);
    transition: var(--transition);
}
.admin-search input:focus {
    outline: none;
    border-color: var(--color-olive);
}

/* ============================================
   GRID DE CLIENTES
============================================ */
.clientes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.cliente-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
}
.cliente-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
    border-color: transparent;
}

.cliente-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.cliente-avatar {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--color-olive);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.cliente-info h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-navy);
    line-height: 1.3;
}
.cliente-info p {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.cliente-nivel {
    margin-left: auto;
    align-self: flex-start;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    color: var(--color-olive-dark);
    background: rgba(107,123,94,0.12);
    padding: 4px 10px;
    border-radius: 50px;
    flex-shrink: 0;
}

/* Barras de avance */
.avance-block { margin-bottom: 16px; }
.avance-block:last-child { margin-bottom: 0; }

.avance-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 6px;
}
.avance-label {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--color-text);
}
.avance-pct {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-navy);
}

.avance-bar {
    height: 8px;
    background: var(--color-border);
    border-radius: 50px;
    overflow: hidden;
}
.avance-fill {
    height: 100%;
    border-radius: 50px;
    transition: width 0.5s ease;
}
.avance-fill.tesis { background: var(--color-olive); }
.avance-fill.pagos { background: var(--color-terracotta); }

/* ============================================
   ESTADO VACÍO
============================================ */
.empty-state {
    text-align: center;
    padding: 80px 24px;
    background: var(--color-white);
    border: 1px dashed var(--color-border);
    border-radius: 16px;
}
.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: rgba(107,123,94,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}
.empty-icon svg { width: 30px; height: 30px; color: var(--color-olive); }
.empty-state h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--color-navy);
    margin-bottom: 8px;
}
.empty-state p {
    color: var(--color-text-light);
    max-width: 380px;
    margin: 0 auto 24px;
}

/* ============================================
   MODAL
============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(44, 62, 80, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 20px;
    overflow-y: auto;
}
.modal-overlay[hidden] { display: none; }

.modal {
    background: var(--color-white);
    border-radius: 20px;
    width: 100%;
    max-width: 560px;
    box-shadow: var(--shadow-medium);
    animation: modalIn 0.25s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    border-bottom: 1px solid var(--color-border);
}
.modal-head h2 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-navy);
}
.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 4px;
    display: flex;
    transition: var(--transition);
}
.modal-close:hover { color: var(--color-navy); }
.modal-close svg { width: 22px; height: 22px; }

.modal-body { padding: 24px 28px 28px; }

.form-section-label {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-olive);
    margin: 20px 0 14px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--color-border);
}
.form-section-label:first-child { margin-top: 0; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--color-navy);
    margin-bottom: 6px;
}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-cream);
    transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-olive);
    background: var(--color-white);
}

.clave-wrap {
    display: flex;
    gap: 8px;
}
.clave-wrap input { flex: 1; }

/* Rangos */
.range {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    border-radius: 50px;
    background: var(--color-border);
    outline: none;
    margin-top: 4px;
}
.range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-olive);
    cursor: pointer;
    box-shadow: var(--shadow-soft);
}
.range-pagos::-webkit-slider-thumb { border-color: var(--color-terracotta); }
.range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-olive);
    cursor: pointer;
}
.range-pagos::-moz-range-thumb { border-color: var(--color-terracotta); }

.modal-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border);
}
.modal-actions-right {
    display: flex;
    gap: 12px;
    margin-left: auto;
}

/* ============================================
   TOAST
============================================ */
.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--color-navy);
    color: var(--color-white);
    padding: 14px 24px;
    border-radius: 12px;
    font-size: 0.9rem;
    box-shadow: var(--shadow-medium);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 300;
}
.toast[hidden] { display: none; }
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   BITÁCORA (dentro del modal de cliente)
============================================ */
.bitacora-admin { margin-top: 4px; }

.bitacora-form-row {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 12px;
}
.bitacora-add-box {
    background: var(--color-cream);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}
.bitacora-add-box textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    font-size: 0.9rem;
    background: var(--color-white);
    color: var(--color-text);
    resize: vertical;
    min-height: 60px;
    margin-top: 12px;
}
.bitacora-add-box textarea:focus { outline: none; border-color: var(--color-olive); }
.bitacora-add-box .btn-mini { margin-top: 12px; }

.bitacora-lista { display: flex; flex-direction: column; gap: 10px; max-height: 240px; overflow-y: auto; }
.bitacora-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 12px 14px;
}
.bitacora-item-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}
.bitacora-item-fecha {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--color-olive);
}
.bitacora-item-del {
    background: none; border: none; cursor: pointer;
    color: var(--color-text-muted); font-size: 0.8rem;
    padding: 2px 6px;
}
.bitacora-item-del:hover { color: var(--color-danger); }
.bitacora-item-act { font-size: 0.92rem; font-weight: 600; color: var(--color-navy); }
.bitacora-item-notas { font-size: 0.85rem; color: var(--color-text-light); margin-top: 2px; }
.bitacora-item-cli {
    font-size: 0.85rem;
    color: var(--color-text);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--color-border);
}
.bitacora-cli-etq {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--color-terracotta);
    margin-bottom: 4px;
}
.bitacora-nota-cli {
    background: var(--color-cream);
    border-radius: 8px;
    padding: 8px 12px;
    margin-bottom: 6px;
}
.bitacora-nota-cli:last-child { margin-bottom: 0; }
.bitacora-doc {
    display: inline-block;
    margin-top: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-olive-dark);
    text-decoration: underline;
    cursor: pointer;
}
.bitacora-vacia { font-size: 0.85rem; color: var(--color-text-muted); text-align: center; padding: 12px 0; }

@media (max-width: 640px) {
    .bitacora-form-row { grid-template-columns: 1fr; }
}

/* ============================================
   LOGIN DEL ADMIN
============================================ */
.admin-login {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(circle at 20% 20%, rgba(107,123,94,0.10), transparent 45%),
        radial-gradient(circle at 80% 80%, rgba(44,62,80,0.10), transparent 45%),
        var(--color-cream);
}
.admin-login[hidden] { display: none; }

.admin-login-card {
    background: var(--color-white);
    border-radius: 20px;
    padding: 44px 40px;
    box-shadow: var(--shadow-medium);
    width: 100%;
    max-width: 400px;
    text-align: center;
}
.admin-login-logo {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--color-navy);
}
.admin-login-logo span { color: var(--color-olive); font-size: 0.9rem; }
.admin-login-sub { color: var(--color-text-light); font-size: 0.92rem; margin-bottom: 28px; }
.admin-login form { text-align: left; }
.admin-login .form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: 10px;
    font-size: 0.95rem;
    background: var(--color-cream);
    color: var(--color-text);
    transition: var(--transition);
}
.admin-login .form-group input:focus { outline: none; border-color: var(--color-olive); background: var(--color-white); }
.btn-block-admin { width: 100%; margin-top: 6px; }
.admin-login-error { color: var(--color-danger); font-size: 0.88rem; text-align: center; margin: 0 0 14px; }
.admin-login-back {
    display: inline-block;
    margin-top: 20px;
    font-size: 0.86rem;
    color: var(--color-text-muted);
    transition: var(--transition);
}
.admin-login-back:hover { color: var(--color-olive); }

.acceso-nota {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: -4px;
}

/* Oculta el contenido hasta autenticar */
body.no-auth .admin-header,
body.no-auth .admin-main { display: none; }

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 640px) {
    .admin-title { font-size: 1.6rem; }
    .form-row { grid-template-columns: 1fr; }
    .clientes-grid { grid-template-columns: 1fr; }
    .admin-topbar { align-items: stretch; }
    .admin-topbar .btn { width: 100%; }
    .modal-actions { flex-direction: column-reverse; align-items: stretch; }
    .modal-actions-right { margin-left: 0; }
    .modal-actions-right .btn { flex: 1; }
}