/* ============================================================
   NEXO — Dark Navy Design System
   ============================================================ */

:root {
    /* Palette */
    --nexo-bg:           #0f172a;
    --nexo-sidebar-bg:   #1a2744;
    --nexo-card-bg:      #1e293b;
    --nexo-card-hover:   #263348;
    --nexo-border:       #2d3f5a;
    --nexo-border-light: #334155;

    /* Accent */
    --nexo-accent:       #3b82f6;
    --nexo-accent-hover: #2563eb;
    --nexo-accent-glow:  rgba(59, 130, 246, 0.25);

    /* Text */
    --nexo-text-main:    #f1f5f9;
    --nexo-text-muted:   #94a3b8;
    --nexo-text-subtle:  #64748b;

    /* Semantic */
    --nexo-online:       #22d3ee;
    --nexo-like:         #f87171;
    --nexo-danger:       #ef4444;

    /* Misc */
    --nexo-radius:       0.75rem;
    --nexo-shadow:       0 4px 24px rgba(0, 0, 0, 0.35);
    --nexo-shadow-sm:    0 2px 8px rgba(0, 0, 0, 0.25);
}

/* ============================================================
   BASE
   ============================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    background-color: var(--nexo-bg);
    color: var(--nexo-text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--nexo-accent);
    text-decoration: none;
}

a:hover {
    color: var(--nexo-accent-hover);
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--nexo-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--nexo-border-light);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--nexo-accent);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar-nexo {
    background-color: #13203a;
    border-bottom: 1px solid var(--nexo-border);
    padding: 0.65rem 0;
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.brand-nexo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--nexo-text-main) !important;
    text-decoration: none;
}

.brand-nexo span {
    color: var(--nexo-accent);
}

/* User link in navbar */
#header-user-profile {
    color: var(--nexo-text-main) !important;
    font-weight: 500;
    transition: color 0.15s ease;
}

#header-user-profile:hover {
    color: var(--nexo-accent) !important;
}

/* ============================================================
   SIDEBAR NAV
   ============================================================ */
.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    border-radius: 0.625rem;
    color: var(--nexo-text-muted);
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.15s ease;
    text-decoration: none;
    margin-bottom: 0.2rem;
}

.sidebar-nav .nav-link:hover {
    background-color: var(--nexo-card-bg);
    color: var(--nexo-accent);
}

.sidebar-nav .nav-link.active {
    background-color: rgba(59, 130, 246, 0.15);
    color: var(--nexo-accent);
    font-weight: 600;
}

/* ============================================================
   CARDS
   ============================================================ */
.nexo-card {
    background: var(--nexo-card-bg);
    border: 1px solid var(--nexo-border);
    border-radius: var(--nexo-radius);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--nexo-shadow-sm);
    transition: border-color 0.15s ease;
}

.nexo-card:hover {
    border-color: var(--nexo-border-light);
}

/* ============================================================
   FORMS & INPUTS
   ============================================================ */
.form-control,
.form-select {
    background-color: #0f1d32;
    border: 1px solid var(--nexo-border);
    color: var(--nexo-text-main);
    border-radius: 0.5rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus,
.form-select:focus {
    background-color: #0f1d32;
    border-color: var(--nexo-accent);
    color: var(--nexo-text-main);
    box-shadow: 0 0 0 3px var(--nexo-accent-glow);
    outline: none;
}

.form-control::placeholder {
    color: var(--nexo-text-subtle);
}

.form-label {
    color: var(--nexo-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.35rem;
}

.form-check-input {
    background-color: #0f1d32;
    border-color: var(--nexo-border-light);
}

.form-check-input:checked {
    background-color: var(--nexo-accent);
    border-color: var(--nexo-accent);
}

.form-check-label {
    color: var(--nexo-text-muted);
}

/* Textarea específico para el post creator */
#createPostForm textarea.form-control {
    background-color: transparent;
    border: none;
    color: var(--nexo-text-main);
    resize: none;
    outline: none;
    box-shadow: none;
    font-size: 1.05rem;
}

#createPostForm textarea.form-control:focus {
    background-color: transparent;
    border: none;
    box-shadow: none;
}

#createPostForm textarea.form-control::placeholder {
    color: var(--nexo-text-subtle);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
    background-color: var(--nexo-accent);
    border-color: var(--nexo-accent);
    color: #fff;
    font-weight: 500;
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--nexo-accent-hover);
    border-color: var(--nexo-accent-hover);
    box-shadow: 0 0 0 3px var(--nexo-accent-glow);
}

.btn-outline-primary {
    border-color: var(--nexo-accent);
    color: var(--nexo-accent);
}

.btn-outline-primary:hover {
    background-color: var(--nexo-accent);
    color: #fff;
}

.btn-outline-secondary {
    border-color: var(--nexo-border-light);
    color: var(--nexo-text-muted);
}

.btn-outline-secondary:hover {
    background-color: var(--nexo-card-hover);
    border-color: var(--nexo-border-light);
    color: var(--nexo-text-main);
}

.btn-light {
    background-color: var(--nexo-card-hover);
    border-color: var(--nexo-border);
    color: var(--nexo-text-muted);
}

.btn-light:hover {
    background-color: var(--nexo-border-light);
    color: var(--nexo-text-main);
}

.btn-sm.btn-link {
    color: var(--nexo-text-muted);
}

.btn-sm.btn-link:hover {
    color: var(--nexo-text-main);
}

/* Logout button */
#btn-logout {
    border-color: var(--nexo-border-light);
    color: var(--nexo-text-muted);
    font-size: 0.8rem;
}

#btn-logout:hover {
    background-color: var(--nexo-card-hover);
    color: var(--nexo-text-main);
    border-color: var(--nexo-border-light);
}

/* ============================================================
   ALERTS & BADGES
   ============================================================ */
.alert-danger {
    background-color: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.badge.bg-success-subtle {
    background-color: rgba(34, 211, 238, 0.15) !important;
    color: var(--nexo-online) !important;
}

/* ============================================================
   AVATARS
   ============================================================ */
.avatar-img {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--nexo-border-light);
    border: 2px solid var(--nexo-border);
}

.avatar-img-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--nexo-border-light);
    border: 2px solid var(--nexo-border);
}

.avatar-img-lg {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    background-color: var(--nexo-border-light);
    border: 3px solid var(--nexo-border-light);
    box-shadow: var(--nexo-shadow-sm);
}

/* ============================================================
   ONLINE INDICATOR
   ============================================================ */
.online-dot {
    width: 10px;
    height: 10px;
    background-color: var(--nexo-online);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 2px var(--nexo-card-bg), 0 0 6px rgba(34, 211, 238, 0.6);
}

.avatar-wrapper {
    position: relative;
    display: inline-block;
}

.avatar-wrapper .online-badge {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 11px;
    height: 11px;
    background-color: var(--nexo-online);
    border-radius: 50%;
    border: 2px solid var(--nexo-card-bg);
    box-shadow: 0 0 6px rgba(34, 211, 238, 0.5);
}

/* ============================================================
   POSTS
   ============================================================ */
.post-card {
    transition: border-color 0.2s ease;
}

.post-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.post-author-name {
    color: var(--nexo-text-main) !important;
    font-weight: 600;
    text-decoration: none;
}

.post-author-name:hover {
    color: var(--nexo-accent) !important;
}

.post-content {
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-line;
    word-break: break-word;
    margin-bottom: 0.85rem;
    color: var(--nexo-text-main);
}

.post-image-container {
    border-radius: 0.5rem;
    overflow: hidden;
    margin-bottom: 1rem;
    border: 1px solid var(--nexo-border);
}

.post-image {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    display: block;
}

/* Divider separator */
.border-top {
    border-top-color: var(--nexo-border) !important;
}

/* ============================================================
   POST ACTIONS (Like & Comments count)
   ============================================================ */
.post-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--nexo-border);
    margin-bottom: 0.75rem;
}

.btn-like {
    background: none;
    border: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--nexo-text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-like:hover {
    background-color: rgba(248, 113, 113, 0.15);
    color: var(--nexo-like);
}

.btn-like.liked {
    color: var(--nexo-like);
}

.btn-like.liked svg {
    fill: var(--nexo-like);
}

/* ============================================================
   COMMENTS
   ============================================================ */
.comments-container {
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 0.5rem;
    padding: 0.75rem;
    margin-top: 0.5rem;
}

.comment-item {
    display: flex;
    gap: 0.65rem;
    margin-bottom: 0.75rem;
}

.comment-bubble {
    background-color: var(--nexo-card-hover);
    border: 1px solid var(--nexo-border);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    flex-grow: 1;
    font-size: 0.9rem;
    color: var(--nexo-text-main);
}

.comment-author {
    font-weight: 600;
    color: var(--nexo-text-main);
    text-decoration: none;
}

.comment-author:hover {
    color: var(--nexo-accent);
}

.comment-time {
    font-size: 0.75rem;
    color: var(--nexo-text-subtle);
    margin-left: 0.5rem;
}

.comment-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

/* ============================================================
   POST CREATOR — toolbar separator
   ============================================================ */
#createPostForm .border-top {
    border-top-color: var(--nexo-border) !important;
}

/* ============================================================
   IMAGE PREVIEW (post creation)
   ============================================================ */
#imagePreviewThumb {
    border: 1px solid var(--nexo-border) !important;
    border-radius: 0.5rem;
}

#btnRemoveImage {
    background-color: var(--nexo-card-hover);
    border-color: var(--nexo-border);
    color: var(--nexo-text-main);
}

/* ============================================================
   CONNECTED USERS PANEL
   ============================================================ */
.connected-card {
    position: sticky;
    top: 5rem;
}

.nexo-card h6.text-muted,
.nexo-card .text-muted {
    color: var(--nexo-text-muted) !important;
}

.connected-user-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.5rem;
    border-radius: 0.5rem;
    border-bottom: 1px solid var(--nexo-border);
    transition: background-color 0.15s ease;
    text-decoration: none;
    color: var(--nexo-text-main);
    cursor: pointer;
}

.connected-user-item:last-child {
    border-bottom: none;
}

.connected-user-item:hover {
    background-color: var(--nexo-card-hover);
    color: var(--nexo-text-main);
}

/* ============================================================
   PROFILE VIEW
   ============================================================ */
#profile-fullname {
    color: var(--nexo-text-main);
}

#profile-bio {
    color: var(--nexo-text-muted);
}

/* ============================================================
   PRIVATE CHAT WINDOW
   ============================================================ */
.nexo-chat-window {
    position: fixed;
    bottom: 0;
    right: 1.5rem;
    width: 340px;
    background: var(--nexo-card-bg);
    border: 1px solid var(--nexo-border-light);
    border-bottom: none;
    border-top-left-radius: var(--nexo-radius);
    border-top-right-radius: var(--nexo-radius);
    box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.5);
    z-index: 1050;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.nexo-chat-header {
    background: linear-gradient(135deg, #1e3a5f, #1e293b);
    border-bottom: 1px solid var(--nexo-border-light);
    padding: 0.65rem 0.85rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nexo-chat-header #chat-partner-name {
    color: var(--nexo-text-main);
    font-weight: 600;
}

.nexo-chat-header .text-success {
    color: var(--nexo-online) !important;
}

.nexo-chat-body {
    height: 300px;
    overflow-y: auto;
    padding: 0.75rem;
    background-color: #0d1b2e;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.chat-msg {
    max-width: 80%;
    padding: 0.45rem 0.75rem;
    border-radius: 0.75rem;
    font-size: 0.9rem;
    word-break: break-word;
    position: relative;
}

.chat-msg-sent {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--nexo-accent), var(--nexo-accent-hover));
    color: #ffffff;
    border-bottom-right-radius: 0.2rem;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.chat-msg-received {
    align-self: flex-start;
    background-color: var(--nexo-card-hover);
    border: 1px solid var(--nexo-border);
    color: var(--nexo-text-main);
    border-bottom-left-radius: 0.2rem;
}

.chat-msg-time {
    font-size: 0.68rem;
    margin-top: 0.15rem;
    display: block;
    text-align: right;
}

.chat-msg-sent .chat-msg-time {
    color: rgba(224, 231, 255, 0.75);
}

.chat-msg-received .chat-msg-time {
    color: var(--nexo-text-subtle);
}

.nexo-chat-footer {
    border-top: 1px solid var(--nexo-border);
    padding: 0.5rem 0.75rem;
    background-color: var(--nexo-card-bg);
}

.nexo-chat-footer .form-control {
    background-color: #0d1b2e;
    border-color: var(--nexo-border-light);
    color: var(--nexo-text-main);
}

.nexo-chat-footer .form-control:focus {
    border-color: var(--nexo-accent);
    box-shadow: 0 0 0 3px var(--nexo-accent-glow);
}

/* ============================================================
   LOADING / EMPTY STATES
   ============================================================ */
#chat-loading-msg,
#online-empty-msg {
    color: var(--nexo-text-muted) !important;
}

/* ============================================================
   BOOTSTRAP OVERRIDES — Global
   ============================================================ */

/* Make text-muted respect dark theme */
.text-muted {
    color: var(--nexo-text-muted) !important;
}

.text-secondary {
    color: var(--nexo-text-subtle) !important;
}

/* Ensure small muted labels render correctly */
small, .small {
    color: inherit;
}

/* Override Bootstrap border utilities */
.border-bottom {
    border-bottom-color: var(--nexo-border) !important;
}

/* ============================================================
   UTILITIES
   ============================================================ */
.cursor-pointer {
    cursor: pointer;
}

.tracking-wider {
    letter-spacing: 0.05em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 767px) {
    .nexo-chat-window {
        right: 0;
        width: 100%;
        border-radius: 0;
    }

    .nexo-card {
        border-radius: 0.5rem;
        padding: 1rem;
    }
}