:root {
    --app-navy: #0b1220;
    --app-navy-2: #111c31;
    --app-surface: #ffffff;
    --app-page: #f4f7fb;
    --app-text: #172033;
    --app-muted: #697386;
    --app-border: #e4eaf2;
    --app-primary: #2f6fed;
    --app-primary-dark: #245bc9;
    --app-success: #169c72;
    --app-warning: #d98b09;
    --app-danger: #dc4c64;
    --app-info: #1688b8;
    --app-radius: 16px;
    --app-shadow: 0 10px 28px rgba(20, 36, 64, .07);
    --app-shadow-hover: 0 16px 38px rgba(20, 36, 64, .12);
}

* { -webkit-font-smoothing: antialiased; }
body {
    min-height: 100vh;
    background: var(--app-page);
    color: var(--app-text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { text-underline-offset: 3px; }

.app-shell { min-height: 100vh; }
.app-topbar {
    background: linear-gradient(115deg, var(--app-navy), var(--app-navy-2));
    border-bottom: 1px solid rgba(255,255,255,.08);
    box-shadow: 0 2px 10px rgba(7, 13, 25, .16);
}
.navbar-brand {
    letter-spacing: -.025em;
    font-size: 1.05rem;
    display: inline-flex;
    align-items: center;
    gap: .65rem;
}
.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 9px;
    color: white;
    font-size: .78rem;
    font-weight: 800;
    background: linear-gradient(135deg, #4e8bff, #6c5ce7);
    box-shadow: 0 5px 14px rgba(55, 111, 237, .35);
}
.nav-utility {
    color: rgba(255,255,255,.74) !important;
    font-size: .78rem;
    font-weight: 600;
    border-radius: 8px;
    padding: .42rem .6rem !important;
    transition: color .2s ease, background .2s ease;
}
.nav-utility:hover, .nav-utility.active {
    color: #fff !important;
    background: rgba(255,255,255,.11);
}
.nav-utility.nav-danger:hover { background: rgba(220, 76, 100, .22); }

.app-content {
    opacity: 1;
    transform: none;
}
.app-content.is-ready { opacity: 1; transform: translateY(0); }
.app-content.is-leaving { opacity: 1; }
.page-preloader { display: none !important; }

.app-main { padding-top: 1.75rem; padding-bottom: 2.5rem; }
.page-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.page-toolbar h4 {
    color: var(--app-navy);
    font-size: 1.35rem;
    letter-spacing: -.03em;
}
.page-toolbar .text-muted { color: var(--app-muted) !important; }

.card {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow);
    background: var(--app-surface);
}
.card:hover { box-shadow: var(--app-shadow-hover); }
.card > .card-header {
    background: transparent;
    border-bottom-color: var(--app-border);
}
.stat-card {
    border-left: 4px solid var(--app-primary);
    transition: transform .2s ease, box-shadow .2s ease;
}
.stat-card:hover { transform: translateY(-2px); }
.stat-card--warning { border-left-color: var(--app-warning); }
.stat-card--success { border-left-color: var(--app-success); }
.stat-card--info { border-left-color: var(--app-info); }
.stat-card--danger { border-left-color: var(--app-danger); }
.stat-card .fs-3 { color: var(--app-navy); letter-spacing: -.035em; }
.card-accent-success { border-left: 4px solid var(--app-success); }
.form-card-narrow { max-width: 720px; }

.btn {
    border-radius: 9px;
    font-weight: 650;
    padding: .48rem .8rem;
    transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
    border-color: var(--app-primary);
    background: var(--app-primary);
    box-shadow: 0 5px 12px rgba(47, 111, 237, .18);
}
.btn-primary:hover, .btn-primary:focus {
    border-color: var(--app-primary-dark);
    background: var(--app-primary-dark);
}
.btn-outline-primary { color: var(--app-primary); border-color: #bcd1ff; }

.form-label { color: #344054; font-size: .84rem; font-weight: 700; margin-bottom: .42rem; }
.form-control, .form-select {
    min-height: 42px;
    border-color: #d8e0ea;
    border-radius: 9px;
    color: var(--app-text);
}
textarea.form-control { min-height: auto; }
.form-control:focus, .form-select:focus {
    border-color: #87acff;
    box-shadow: 0 0 0 .22rem rgba(47, 111, 237, .12);
}
.form-text { color: var(--app-muted); }

.table { --bs-table-bg: transparent; --bs-table-hover-bg: #f7faff; margin-bottom: 0; }
.table thead th {
    color: #667085;
    background: #f8fafc;
    border-bottom: 1px solid var(--app-border);
    font-size: .72rem;
    font-weight: 800;
    letter-spacing: .045em;
    text-transform: uppercase;
    white-space: nowrap;
}
.table > :not(caption) > * > * { border-bottom-color: var(--app-border); padding: .85rem .75rem; }
.table-responsive { overflow-x: auto; overflow-y: visible !important; min-height: 220px; }
.table-responsive .dropdown-menu { z-index: 1050; }
.badge { border-radius: 999px; padding: .38rem .62rem; font-size: .7rem; font-weight: 750; letter-spacing: .01em; }

.alert { border: 0; border-radius: 12px; box-shadow: 0 5px 16px rgba(20, 36, 64, .06); }
.page-tabs { border-bottom-color: var(--app-border); }
.page-tabs .nav-link { color: var(--app-muted); }
.page-tabs .nav-link.active { color: var(--app-primary); border-bottom-color: var(--app-primary); }
.code-block {
    padding: 1rem;
    border: 1px solid var(--app-border);
    border-radius: 10px;
    background: #f8fafc;
    color: #344054;
}

/* Chat Thread & Conversation Shell */
.chat-card-container {
    max-width: 880px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
    background: #ffffff;
}

.chat-avatar-lg {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: #ffffff;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 1.05rem;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.chat-header-bar {
    background: #ffffff;
    border-bottom: 1px solid #f1f5f9;
}

.online-indicator {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.inbox-thread {
    min-height: 200px;
    max-height: 520px;
    overflow-y: auto;
    background: #f8fafc;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    scroll-behavior: smooth;
}

/* Custom Scrollbar for Chat */
.inbox-thread::-webkit-scrollbar {
    width: 6px;
}
.inbox-thread::-webkit-scrollbar-track {
    background: transparent;
}
.inbox-thread::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 99px;
}
.inbox-thread::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Date Divider */
.chat-date-divider {
    text-align: center;
    position: relative;
    z-index: 1;
    margin: 0.5rem 0;
}
.chat-date-divider::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e2e8f0;
    z-index: -1;
}
.chat-date-divider span {
    background: #e2e8f0;
    color: #475569;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.65rem;
    border-radius: 99px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

/* Thread Row & Bubbles */
.inbox-thread-row {
    display: flex;
    align-items: flex-end;
    width: 100%;
    flex: 0 0 auto;
    margin-bottom: 0.1rem;
}
.inbox-thread-row--in {
    justify-content: flex-start;
}
.inbox-thread-row--out {
    justify-content: flex-end;
}

.chat-avatar {
    width: 26px;
    height: 26px;
    border-radius: 7px;
    display: grid;
    place-items: center;
    font-size: 0.75rem;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
    flex-shrink: 0;
}

.chat-message-bubble {
    max-width: 72%;
    width: fit-content;
    padding: 0.32rem 0.55rem 0.28rem;
    position: relative;
    font-size: 0.875rem;
    line-height: 1.35;
    word-break: break-word;
    display: inline-flex;
    flex-direction: column;
    gap: 0.12rem;
}

/* Incoming Bubble */
.chat-message-in {
    background: #ffffff;
    color: #1e293b;
    border: 1px solid #e2e8f0;
    border-radius: 16px 16px 16px 4px;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
}

/* Outgoing Bubble */
.chat-message-out {
    background: linear-gradient(135deg, #2f6fed 0%, #1d52d8 100%);
    color: #ffffff;
    border-radius: 16px 16px 4px 16px;
    box-shadow: 0 3px 10px rgba(47, 111, 237, 0.2);
}

/* Device Tag */
.chat-device-tag {
    font-size: 0.62rem;
    font-weight: 600;
    opacity: 0.85;
    margin: 0;
    line-height: 1.1;
}

.chat-bubble-content {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    column-gap: 0.45rem;
    row-gap: 0.05rem;
    width: 100%;
}

/* Compact Text & Meta Timestamp */
.chat-text {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 100%;
    font-size: 0.875rem;
    line-height: 1.35;
    white-space: pre-wrap;
}

.chat-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    flex: 0 0 auto;
    margin: 0 0 0 auto;
    float: none;
    font-size: 0.62rem;
    opacity: 0.78;
    line-height: 1;
    white-space: nowrap;
    user-select: none;
}
.chat-time {
    font-family: inherit;
}
.chat-status-icon {
    font-size: 0.65rem;
    font-weight: 800;
}

/* Quick Reply Bar */
.chat-reply-bar {
    background: #ffffff !important;
    border-top: 1px solid #e2e8f0 !important;
}
.chat-input-textarea {
    border-radius: 12px 0 0 12px !important;
    border: 1px solid #cbd5e1;
    resize: none;
    font-size: 0.92rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.chat-input-textarea:focus {
    border-color: #2f6fed;
    box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.12);
}
.chat-reply-bar .btn-primary {
    border-radius: 0 12px 12px 0 !important;
}
.extra-small {
    font-size: 0.73rem;
}

/* Empty State */
.chat-empty-icon {
    font-size: 2.5rem;
    opacity: 0.6;
}

.chat-thread, .ai-chat-thread {
    background: #f5f8fc !important;
    border: 1px solid #e3eaf4;
    border-radius: 14px !important;
}
.chat-bubble, .ai-bubble {
    max-width: 85%;
    width: fit-content;
    flex: 0 0 auto;
    box-shadow: 0 3px 9px rgba(25, 43, 75, .06);
}
.chat-bubble.in, .ai-bubble.assistant {
    margin-right: auto;
    background: #fff !important;
    border: 1px solid #e2e8f0;
}
.chat-bubble.out, .ai-bubble.user {
    margin-left: auto;
    background: linear-gradient(135deg, #2f6fed, #245bc9) !important;
    color: #fff !important;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    overflow: hidden;
    background:
        radial-gradient(circle at 12% 18%, rgba(69, 130, 255, .25), transparent 32%),
        radial-gradient(circle at 88% 85%, rgba(100, 85, 215, .25), transparent 30%),
        linear-gradient(130deg, #07101e, #14233c);
}
.login-page::before {
    position: fixed;
    content: "";
    inset: 0;
    opacity: .13;
    background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
    background-size: 42px 42px;
    pointer-events: none;
}
.login-card {
    position: relative;
    width: 100%;
    max-width: 430px;
    padding: 2rem !important;
    border: 1px solid rgba(255,255,255,.5);
    border-radius: 20px;
    box-shadow: 0 24px 65px rgba(0, 0, 0, .28);
}
.login-brand { display: inline-flex; align-items: center; gap: .65rem; }
.login-brand .brand-mark { width: 36px; height: 36px; }

@media (max-width: 991.98px) {
    .navbar-nav { padding-top: .75rem; }
    .nav-utility { display: block; margin-bottom: .2rem; }
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
    .app-content { opacity: 1; transform: none; }
}