/* =========================================
   2. SIDEBAR FLOTANTE
   ========================================= */
.sidebar {
    width: 320px;
    min-width: 320px;
    background-color: var(--bg-sidebar);
    border-radius: 32px;
    margin: 15px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    border: 1px solid rgb(183 183 183 / 36%);
    position: relative;
    z-index: 100;
    transition: width 0.5s var(--apple-ease), min-width 0.5s var(--apple-ease),
                box-shadow 0.5s var(--apple-ease), transform 0.5s var(--apple-ease),
                border-color 0.5s var(--apple-ease);
    overflow-x: hidden;
}

.sidebar::-webkit-scrollbar { width: 0px; }

.sidebar:hover {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
}

.sidebar-header {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.logo-copy {
    min-width: 0;
}

.brain-hub {
    position: relative;
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 18px;
    background: linear-gradient(145deg, rgba(255,255,255,0.96), rgba(240,244,248,0.96));
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
    overflow: visible;
}

.brain-hub::before,
.brain-hub::after {
    content: "";
    position: absolute;
    inset: 6px;
    border-radius: 16px;
    opacity: 0;
    pointer-events: none;
}

.brain-hub::before {
    background: radial-gradient(circle, rgba(74, 222, 128, 0.38), rgba(59, 130, 246, 0.16) 55%, transparent 72%);
    filter: blur(8px);
}

.brain-hub::after {
    inset: -4px;
    background:
        radial-gradient(circle at 25% 70%, rgba(255,255,255,0.7), transparent 32%),
        radial-gradient(circle at 70% 20%, rgba(147, 197, 253, 0.58), transparent 26%),
        radial-gradient(circle at 85% 85%, rgba(52, 211, 153, 0.42), transparent 28%);
    filter: blur(12px);
}

.brain-hub.has-alert {
    animation: brainPulse 3.2s ease-in-out infinite;
}

.brain-hub.is-fresh {
    animation: brainFreshPulse 0.68s cubic-bezier(0.16, 0.92, 0.2, 1);
}

.brain-hub.has-alert::before,
.brain-hub.has-alert::after {
    opacity: 1;
    animation: brainSmoke 4.2s ease-in-out infinite;
}

.logo-img { width: 40px; filter: grayscale(100%) contrast(150%); }
.logo-text { font-size: 1.3rem; font-weight: 800; color: #111; white-space: nowrap; }

.notification-badge {
    min-width: 23px;
    height: 23px;
    padding: 0 6px;
    border-radius: 999px;
    background: #ef4444;
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 800;
    box-shadow: 0 8px 18px rgba(239, 68, 68, 0.089);
}

.notification-badge[hidden] {
    display: none !important;
}

.brain-hub .notification-badge {
    position: absolute;
    top: -6px;
    right: -6px;
}

.notification-badge.is-fresh {
    animation: notificationBadgePop 0.7s cubic-bezier(0.16, 0.92, 0.2, 1);
}

@keyframes adminBadgePulse {
    0%, 100% {
        box-shadow:
            0 8px 18px rgba(239, 68, 68, 0.3),
            0 0 0 0 rgba(239, 68, 68, 0.42);
    }
    50% {
        box-shadow:
            0 8px 18px rgba(239, 68, 68, 0.36),
            0 0 0 5px rgba(239, 68, 68, 0);
    }
}

.notification-badge.inline {
    margin-left: auto;
}

.nav-btn .notification-badge.inline,
.shortcut-btn .notification-badge.inline,
.sub-nav-btn .notification-badge.inline {
    position: absolute;
    top: -12px;
    right: -8px;
    margin-left: 0;
    border: 2px solid #ffffff;
    box-shadow:
        0 8px 18px rgba(239, 68, 68, 0.3),
        0 0 0 0 rgba(239, 68, 68, 0.46);
    animation: adminBadgePulse 1.4s ease-in-out infinite;
}

.nav-btn .notification-badge.inline {
    top: 10px;
    right: 12px;
}

.notification-popup {
    position: fixed;
    top: var(--notification-popup-top, 24px);
    left: var(--notification-popup-left, 24px);
    z-index: 1200;
    width: var(--notification-popup-width, min(390px, calc(100vw - 24px)));
    max-width: calc(100vw - 24px);
    border-radius: 24px;
    background: rgba(255, 255, 255, 1);
    border: 1px solid rgba(226, 232, 240, 0.95);
    box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
    padding: 14px;
    display: grid;
    gap: 12px;
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top left;
    pointer-events: none;
    will-change: transform, opacity, filter;
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.notification-popup.is-open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.notification-popup[hidden] {
    display: none !important;
}

.notification-popup-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.92rem;
    color: #0f172a;
}

.notification-popup-copy {
    display: grid;
    gap: 3px;
}

.notification-popup-copy small {
    color: #64748b;
    font-size: 0.76rem;
    line-height: 1.35;
}

.notification-popup-actions {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.notification-popup-close {
    width: 32px;
    height: 32px;
    border: 1px solid rgba(226, 232, 240, 0.95);
    border-radius: 12px;
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    color: #334155;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.notification-popup-close:hover {
    transform: translateY(-1px);
    border-color: rgba(15, 23, 42, 0.12);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.notification-popup-list {
    display: grid;
    gap: 10px;
    max-height: 260px;
    overflow-y: auto;
}

.notification-item {
    width: 100%;
    border: none;
    border-radius: 18px;
    padding: 12px 14px;
    display: grid;
    grid-template-columns: 10px 1fr;
    gap: 12px;
    text-align: left;
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.85);
}

.notification-item.is-unread {
    border: 1px solid rgba(59, 130, 246, 0.14);
}

.notification-item > div {
    display: grid;
    gap: 4px;
}

.notification-item strong {
    color: #0f172a;
    font-size: 0.9rem;
}

.notification-item span,
.notification-item small {
    color: #64748b;
    line-height: 1.45;
}

.notification-item-severity {
    width: 10px;
    border-radius: 999px;
    background: #94a3b8;
}

.notification-item-severity.warning {
    background: #f59e0b;
}

.notification-item-severity.danger {
    background: #ef4444;
}

.notification-item-severity.info {
    background: #3b82f6;
}

@keyframes notificationBadgePop {
    0% {
        transform: scale(0.82);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.34);
    }
    55% {
        transform: scale(1.18);
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

@keyframes brainFreshPulse {
    0% {
        transform: translateY(0) scale(1);
        box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
    }
    45% {
        transform: translateY(-2px) scale(1.08);
        box-shadow: 0 18px 34px rgba(59, 130, 246, 0.2);
    }
    100% {
        transform: translateY(0) scale(1);
        box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
    }
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: #f8f9fa;
    padding: 8px 16px;
    border-radius: var(--radius-pill);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
    border: 1px solid #dbdbdb;
}

.divider {
    border: none;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(0,0,0,0.1), transparent);
    margin: 15px 0;
}

/* Menú y Botones del Sidebar */
.main-nav { display: flex; flex-direction: column; gap: 5px; }

.nav-btn {
    background: transparent; border: 1px solid rgb(255 201 48 / 59%); padding: 12px 18px; border-radius: var(--radius-pill);
    font-size: 0.95rem; color: var(--text-muted); text-align: left; cursor: pointer;
    transition: all 0.4s var(--apple-ease); display: flex; align-items: center; gap: 12px; white-space: nowrap;
    position: relative;
}
.nav-btn:hover { background-color: rgba(0, 0, 0, 0.03); }
.nav-btn.active { background-color: rgb(255 208 55); color: #111; font-weight: 600; }

.nav-deck-toggle {
    display: none;
}

@media (min-width: 861px) {
    .nav-deck-toggle {
        width: 100%;
        height: auto;
        min-height: 22px;
        border: 0;
        padding: 0;
        background: transparent;
        cursor: pointer;
        display: flex;
        align-items: center;
        gap: 8px;
        color: rgba(15, 23, 42, 0.34);
    }

    .nav-deck-toggle[hidden] {
        display: none !important;
    }

    .nav-deck-toggle:disabled {
        cursor: default;
    }

    .nav-deck-toggle:disabled i {
        opacity: 0.68;
    }

    .nav-deck-toggle .nav-deck-line {
        height: 1px;
        flex: 1 1 auto;
        background: linear-gradient(to right, transparent, rgba(0,0,0,0.1), transparent);
    }

    .nav-deck-toggle i {
        width: 18px;
        height: 18px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 50%;
        font-size: 0.72rem;
        transition: transform 0.46s cubic-bezier(.2, 1.42, .36, 1), color 0.24s ease, background 0.24s ease;
    }

    .nav-deck-toggle:hover i,
    .nav-deck-toggle:focus-visible i {
        background: rgba(15, 23, 42, 0.06);
        color: rgba(15, 23, 42, 0.68);
    }

    .sidebar.nav-deck-collapsed .nav-deck-toggle i {
        transform: rotate(180deg);
    }

    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav {
        min-height: 64px;
        height: 64px;
        position: relative;
        overflow: visible;
        margin: 4px 0 10px;
        transition:
            height 0.46s cubic-bezier(.18, 1.12, .32, 1),
            margin 0.46s ease;
    }

    .sidebar:not(.collapsed).nav-deck-closing .main-nav {
        position: relative;
        min-height: 226px;
        height: 226px;
        overflow: visible;
        transition:
            height 0.46s cubic-bezier(.18, 1.12, .32, 1),
            margin 0.46s ease;
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav {
        position: relative;
        min-height: 226px;
        height: 226px;
        overflow: visible;
        animation: navDeckMenuOpen 1.02s cubic-bezier(.22, .98, .34, 1) both;
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn,
    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn,
    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn {
        position: absolute;
        top: calc(var(--deck-layer, 0) * 4px);
        left: 0;
        width: 100%;
        transform-origin: 50% 0;
        transition:
            top 0.68s cubic-bezier(.18, 1.34, .32, 1),
            transform 0.68s cubic-bezier(.18, 1.34, .32, 1),
            opacity 0.42s ease,
            background-color 0.34s ease,
            box-shadow 0.34s ease,
            color 0.28s ease;
        transition-delay: calc(var(--deck-layer, 0) * 54ms);
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn {
        z-index: var(--deck-z, 5);
        animation: navDeckCardUnfold 0.72s cubic-bezier(.18, 1.28, .32, 1) both;
        animation-delay: calc(180ms + (var(--deck-index, 0) * 64ms));
    }

    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn {
        top: calc(var(--deck-layer, 0) * 4px);
        z-index: var(--deck-z, 5);
        animation: navDeckCardFold 0.68s cubic-bezier(.18, 1.34, .32, 1) both;
        animation-delay: calc(var(--deck-layer, 0) * 54ms);
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn.active,
    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn.active,
    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn.active {
        z-index: 12;
        transform: translateY(0) scale(1);
        opacity: 1;
        box-shadow: 0 8px 18px rgba(15, 23, 42, 0.045);
    }

    .sidebar:not(.collapsed).nav-deck-closing.nav-deck-settling .main-nav .nav-btn.active {
        animation: navDeckActiveFold 0.74s cubic-bezier(.18, 1.38, .34, 1) both;
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn:not(.active),
    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn:not(.active),
    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn:not(.active) {
        z-index: var(--deck-z, 5);
        background: rgba(255, 255, 255, 0.76);
        border: 1px solid rgb(255 201 48);
        color: rgba(15, 23, 42, 0.12);
        opacity: var(--deck-opacity, 0.72);
        transform:
            translateY(calc(var(--deck-layer, 1) * 1px))
            scale(calc(1 - (var(--deck-layer, 1) * 0.004)));
        box-shadow: 0 4px 12px rgba(15, 23, 42, 0.025);
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn,
    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn,
    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn:not(.active) {
        pointer-events: none;
    }

    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn i,
    .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn span {
        animation: navDeckTextWake 0.44s ease both;
        animation-delay: calc(360ms + (var(--deck-index, 0) * 64ms));
    }

    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn:not(.active) i,
    .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn:not(.active) span,
    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn:not(.active) i,
    .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn:not(.active) span {
        opacity: 0.07;
        transition: opacity 0.28s ease;
    }

    @keyframes navDeckCardUnfold {
        0% {
            top: calc(var(--deck-layer, 0) * 4px);
            transform: translateY(calc(var(--deck-layer, 1) * 1px)) scale(calc(1 - (var(--deck-layer, 1) * 0.004)));
            opacity: var(--deck-opacity, 0.72);
        }
        28% {
            top: calc(var(--deck-layer, 0) * 4px);
            transform: translateY(calc(var(--deck-layer, 1) * 1px)) scale(1);
        }
        72% {
            top: 0;
            transform: translateY(calc(var(--deck-open-y, 0px) + 3px)) scale(1);
        }
        88% {
            top: 0;
            transform: translateY(calc(var(--deck-open-y, 0px) - 1px)) scale(1);
        }
        100% {
            top: 0;
            transform: translateY(var(--deck-open-y, 0px)) scale(1);
            opacity: 1;
        }
    }

    @keyframes navDeckMenuOpen {
        0% {
            height: 64px;
            min-height: 64px;
            margin-bottom: 10px;
        }
        34% {
            height: 76px;
            min-height: 76px;
            margin-bottom: 10px;
        }
        100% {
            height: 226px;
            min-height: 226px;
            margin-bottom: 10px;
        }
    }

    @keyframes navDeckCardFold {
        0% {
            transform: translateY(var(--deck-open-y, 0px)) scale(1);
            opacity: 1;
        }
        64% {
            transform: translateY(calc((var(--deck-layer, 1) * 1px) - 2px)) scale(0.998);
        }
        82% {
            transform: translateY(calc((var(--deck-layer, 1) * 1px) + 1px)) scale(1);
        }
        100% {
            transform: translateY(calc(var(--deck-layer, 1) * 1px)) scale(calc(1 - (var(--deck-layer, 1) * 0.004)));
            opacity: var(--deck-opacity, 0.72);
        }
    }

    @keyframes navDeckActiveFold {
        0% { transform: translateY(var(--deck-open-y, 0px)) scale(1); }
        58% { transform: translateY(-3px) scale(1.008); }
        76% { transform: translateY(1px) scale(0.998); }
        90% { transform: translateY(-0.5px) scale(1.002); }
        100% { transform: translateY(0) scale(1); }
    }

    @keyframes navDeckTextWake {
        0%, 35% { opacity: 0.1; }
        100% { opacity: 1; }
    }

    .sidebar.collapsed .nav-deck-toggle {
        display: none;
    }

    body.dark-mode .nav-deck-toggle {
        color: rgba(226, 232, 240, 0.34);
    }

    body.dark-mode .nav-deck-toggle .nav-deck-line {
        background: linear-gradient(to right, transparent, rgba(226, 232, 240, 0.16), transparent);
    }

    body.dark-mode .nav-deck-toggle:hover i,
    body.dark-mode .nav-deck-toggle:focus-visible i {
        background: rgba(226, 232, 240, 0.08);
        color: rgba(248, 250, 252, 0.72);
    }

    body.dark-mode .sidebar:not(.collapsed).nav-deck-opening .main-nav .nav-btn:not(.active),
    body.dark-mode .sidebar:not(.collapsed).nav-deck-closing .main-nav .nav-btn:not(.active),
    body.dark-mode .sidebar:not(.collapsed).nav-deck-collapsed .main-nav .nav-btn:not(.active) {
        background: rgba(15, 23, 42, 0.92);
        border-color: rgba(51, 65, 85, 0.78);
        box-shadow: 0 5px 18px rgba(0, 0, 0, 0.16);
    }

    .sidebar.nav-deck-user:not(.collapsed).nav-deck-closing .main-nav {
        min-height: 142px;
        height: 142px;
    }

    .sidebar.nav-deck-user:not(.collapsed).nav-deck-opening .main-nav {
        min-height: 142px;
        height: 142px;
        animation-name: navDeckUserMenuOpen;
    }

    @keyframes navDeckUserMenuOpen {
        0% {
            height: 64px;
            min-height: 64px;
            margin-bottom: 10px;
        }
        34% {
            height: 76px;
            min-height: 76px;
            margin-bottom: 10px;
        }
        100% {
            height: 142px;
            min-height: 142px;
            margin-bottom: 10px;
        }
    }
}

.btn-primary {
    background-color: #111; color: white; border: none; padding: 14px 20px;
    border-radius: var(--radius-pill); font-size: 1rem; font-weight: 600; cursor: pointer;
    transition: all 0.4s var(--apple-ease); display: flex; align-items: center; justify-content: center;
    gap: 10px; width: 100%; white-space: nowrap;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }

.search-container {
    background-color: #f8f9fa; border-radius: var(--radius-pill); padding: 10px 15px;
    display: flex; align-items: center; gap: 10px; margin: 15px 0; border: 1px solid var(--border-color);
}
.search-input { border: none; background: transparent; outline: none; width: 100%; font-size: 0.9rem; }

@keyframes brainPulse {
    0%, 100% { transform: translateY(0) scale(1); }
    45% { transform: translateY(-1px) scale(1.03); }
    60% { transform: translateY(0) scale(1.015); }
}

@keyframes brainSmoke {
    0% { transform: scale(0.96) translateY(2px); opacity: 0.28; }
    50% { transform: scale(1.08) translateY(-6px); opacity: 0.72; }
    100% { transform: scale(1.16) translateY(-12px); opacity: 0.18; }
}

/* Historial */
.chat-history { flex: 1; overflow-y: auto; }
.history-group summary { font-size: 0.75rem; font-weight: 700; color: #999; text-transform: uppercase; margin-bottom: 8px; margin-left: 15px; list-style: none; cursor: pointer; }

.chat-item {
    display: flex;
    align-items: center;
    justify-content: space-between; /* Texto a la izq, botones a la der */
    padding: 10px 12px;
    gap: 8px;
    width: 100%;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: none;
    background: transparent;
    cursor: pointer;
}

.chat-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1; /* Ocupa todo el espacio sobrante */
    min-width: 0; /* CRÍTICO: Permite que el texto se corte */
}

/* El texto del título específicamente */
.chat-title {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis; /* Pone los ... solo cuando es largo */
    font-size: 0.9rem;
    color: var(--text-main);
    text-align: left;
}

/* Contenedor de los botones (Pin y Editar) */
.chat-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0; /* Evita que los botones se achiquen */
}

.chat-actions i {
    font-size: 0.85rem;
    color: #999;
    padding: 4px;
    transition: color 0.2s;
}

.chat-actions i:hover {
    color: #111;
}


.chat-item:hover { background-color: rgba(0,0,0,0.03); }
.chat-item.active { background-color: #f0f4f8; color: #111; font-weight: 600; }
.chat-item.is-generating {
    border-color: rgba(37, 99, 235, 0.24) !important;
}

.chat-generating-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    flex: 0 0 18px;
    color: #2563eb;
    font-size: 0.78rem;
}

.chat-generating-pill[hidden] {
    display: none;
}

/* Footer Sidebar */
.sidebar-footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: auto; padding-top: 15px; }
.btn-logout { flex: 1; height: 45px; background: transparent; border: 1px solid rgb(183 183 183 / 36%); border-radius: var(--radius-pill); cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--text-muted); font-weight: 500; font-size: 0.95rem; transition: all 0.3s ease; white-space: nowrap; padding: 0 80px; }
.btn-logout:hover { background-color: #fff0f0; color: #d32f2f; border-color: #ffcdd2; }
.btn-info { width: 45px; height: 45px; border-radius: 50%; border: 1px solid rgb(183 183 183 / 36%); background: transparent; cursor: pointer; color: #fbbc04; font-size: 1.1rem; font-weight: bold; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all 0.3s ease; }
.btn-info:hover { background-color: #fffbf0; border-color: #ffe082; transform: scale(1.05); }

.btn-toggle {
    background: #ebebeb;; 
    border: none; 
    color: #94a3b8; 
    cursor: pointer; 
    margin-left: auto; 
    padding: 0; 
    border-radius: 999px; 
    transition: background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    width: 38px; 
    height: 38px; 
    flex-shrink: 0;
}
.sidebar:not(.collapsed) .btn-toggle {
    margin-left: auto;
    margin-right: -8px;
    transform: translate(2px, 3px);
}

/* Reset cuando la sidebar está cerrada */
.sidebar.collapsed .btn-toggle {
    margin: 0 auto !important;
    transform: none !important;
}
.btn-toggle i { font-size: 1rem; transition: transform 0.35s ease; }
.btn-toggle:hover { background-color: rgba(15, 23, 42, 0.06); color: #1f2937; box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.05); }

/* =========================================
   3. ESTADO COLAPSADO SIDEBAR
   ========================================= */
.sidebar.collapsed { width: 90px; min-width: 90px; padding: 20px 0px; align-items: center; overflow: visible; }
.sidebar.collapsed .logo-text, .sidebar.collapsed .user-name, .sidebar.collapsed .nav-btn span, .sidebar.collapsed .btn-primary span, .sidebar.collapsed .btn-logout span, .sidebar.collapsed .search-input, .sidebar.collapsed .chat-history, .sidebar.collapsed .master-history { display: none !important; }
.sidebar.collapsed .sidebar-header { width: 100%; align-items: center; gap: 20px; }
.sidebar.collapsed .logo-container { flex-direction: column; align-items: center; gap: 15px; width: 100%; justify-content: center; }
.sidebar.collapsed .logo-img { width: 35px; margin: 0; }
.sidebar.collapsed .btn-toggle { margin: 0; }
.sidebar.collapsed .btn-toggle i { transform: rotate(180deg); }
.sidebar.collapsed .nav-btn.active { background-color: #f0f4f8 !important; color: #111 !important; box-shadow: inset 0 0 0 1px rgba(0,0,0,0.05) !important; }
.sidebar.collapsed .user-profile, .sidebar.collapsed .nav-btn, .sidebar.collapsed .new-chat-container .btn-primary, .sidebar.collapsed .btn-logout, .sidebar.collapsed .btn-info, .sidebar.collapsed .search-container { width: 48px !important; height: 48px !important; min-height: 48px !important; padding: 0 !important; border-radius: 50% !important; display: flex !important; align-items: center !important; justify-content: center !important; margin: 0 auto !important; flex: none !important; border: none !important; background: transparent; }
.sidebar.collapsed .user-icon, .sidebar.collapsed .nav-btn i, .sidebar.collapsed .btn-primary i, .sidebar.collapsed .search-icon, .sidebar.collapsed .btn-logout i, .sidebar.collapsed .btn-info i { margin: 0 !important; font-size: 1.2rem !important; width: auto !important; }
.sidebar.collapsed .sidebar-footer { width: 100%; flex-direction: column; align-items: center; gap: 15px; }

.sidebar.collapsed [data-sidebar-tooltip] {
    position: relative;
}

.sidebar.collapsed [data-sidebar-tooltip]::before,
.sidebar.collapsed [data-sidebar-tooltip]::after {
    position: absolute;
    top: 50%;
    left: calc(100% + 14px);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translate(8px, -50%) scale(0.96);
    transition:
        opacity 0.18s ease 0.62s,
        transform 0.22s var(--apple-ease) 0.62s,
        visibility 0s linear 0.84s;
    z-index: 1800;
}

.sidebar.collapsed [data-sidebar-tooltip]::before {
    content: attr(data-sidebar-tooltip);
    min-width: max-content;
    max-width: min(260px, calc(100vw - 128px));
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    color: #0f172a;
    border: 1px solid rgba(226, 232, 240, 0.92);
    box-shadow:
        0 16px 38px rgba(15, 23, 42, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    font-size: 0.88rem;
    font-weight: 750;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar.collapsed [data-sidebar-tooltip]::after {
    content: "";
    left: calc(100% + 7px);
    width: 12px;
    height: 12px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.92);
    border-left: 1px solid rgba(226, 232, 240, 0.88);
    border-bottom: 1px solid rgba(226, 232, 240, 0.88);
    transform: translate(8px, -50%) rotate(45deg) scale(0.9);
    box-shadow: -4px 4px 14px rgba(15, 23, 42, 0.04);
}

.sidebar.collapsed [data-sidebar-tooltip]:hover::before,
.sidebar.collapsed [data-sidebar-tooltip]:focus-visible::before,
.sidebar.collapsed [data-sidebar-tooltip]:hover::after,
.sidebar.collapsed [data-sidebar-tooltip]:focus-visible::after {
    opacity: 1;
    visibility: visible;
    transform: translate(0, -50%) scale(1);
    transition:
        opacity 0.18s ease 0.55s,
        transform 0.24s var(--apple-ease) 0.55s,
        visibility 0s linear 0.55s;
}

.sidebar.collapsed [data-sidebar-tooltip]:hover::after,
.sidebar.collapsed [data-sidebar-tooltip]:focus-visible::after {
    transform: translate(0, -50%) rotate(45deg) scale(1);
}

/* =========================================
   4. ÁREA PRINCIPAL (VISTAS)
   ========================================= */
.sidebar.collapsed [data-sidebar-tooltip]::before,
.sidebar.collapsed [data-sidebar-tooltip]::after {
    display: none !important;
}

.sidebar-tooltip-portal {
    position: fixed;
    z-index: 3200;
    width: max-content;
    min-width: 0;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    color: #0f172a;
    border: 1px solid rgba(226, 232, 240, 0.92);
    box-shadow:
        0 18px 42px rgba(15, 23, 42, 0.14),
        inset 0 1px 0 rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(18px) saturate(145%);
    -webkit-backdrop-filter: blur(18px) saturate(145%);
    font-size: 0.88rem;
    font-weight: 750;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transform: translate(8px, -50%) scale(0.96);
    transform-origin: left center;
    transition: opacity 0.18s ease, transform 0.24s var(--apple-ease), visibility 0s linear 0.18s;
}

.sidebar-tooltip-portal::before {
    content: "";
    position: absolute;
    top: 50%;
    left: -7px;
    width: 12px;
    height: 12px;
    border-radius: 4px;
    background: inherit;
    border-left: 1px solid rgba(226, 232, 240, 0.88);
    border-bottom: 1px solid rgba(226, 232, 240, 0.88);
    transform: translateY(-50%) rotate(45deg);
    box-shadow: -4px 4px 14px rgba(15, 23, 42, 0.04);
}

.sidebar-tooltip-portal[hidden] {
    display: none !important;
}

.sidebar-tooltip-portal.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translate(0, -50%) scale(1);
    transition: opacity 0.18s ease, transform 0.24s var(--apple-ease), visibility 0s linear 0s;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    height: 100vh;
    overflow: hidden;
}

@keyframes viewFadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.view-section { display: none; width: 100%; height: 100%; flex-direction: column; }
.view-section.active { display: flex; animation: viewFadeIn 0.5s var(--apple-ease) forwards; }