@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ========== Layout Variables ========== */

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-active: #4338ca;
    --primary-light: #eef2ff;
    --primary-rgb: 99, 102, 241;
    --sidebar-width: 260px;
    --sidebar-bg: #1e293b;
    --content-bg: #f5f6fa;
    --nav-link-color: rgba(255, 255, 255, 0.75);
    --nav-active-bg: rgba(255, 255, 255, 0.12);
    --nav-active-color: #ffffff;
}

[data-bs-theme="dark"] {
    --sidebar-bg: #0f172a;
    --content-bg: #16181d;
    --nav-link-color: rgba(255, 255, 255, 0.7);
    --nav-active-bg: rgba(255, 255, 255, 0.1);
    --nav-active-color: #ffffff;
    --primary-light: rgba(99, 102, 241, 0.12);
}

/* ========== Global ========== */

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--content-bg);
    min-height: 100vh;
}

/* ========== Cards ========== */

.card {
    border: none !important;
    border-radius: 16px !important;
    box-shadow: 0 2px 14px rgba(0, 0, 0, .06);
}

[data-bs-theme="dark"] .card {
    box-shadow: 0 2px 14px rgba(0, 0, 0, .25);
}

/* ========== Scenario Cards (Dashboard) ========== */

.scenario-card {
    transition: transform 0.15s, box-shadow 0.15s;
    cursor: pointer;
    color: inherit;
}

.scenario-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.15) !important;
}

.scenario-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--primary);
}

/* ========== Upload Zone ========== */

.upload-zone {
    border: 2px dashed var(--bs-border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: border-color 0.2s, background 0.2s;
    cursor: pointer;
}

.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--primary);
    background: var(--primary-light);
}

/* ========== Chat ========== */

.chat-messages {
    min-height: 200px;
    max-height: 420px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 8px 0;
}

.chat-msg {
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.chat-msg.user {
    flex-direction: row-reverse;
}

.chat-msg i {
    font-size: 1.2rem;
    color: var(--bs-secondary-color);
    flex-shrink: 0;
}

.chat-bubble {
    max-width: 75%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 0.875rem;
    line-height: 1.5;
}

.chat-msg.bot .chat-bubble {
    background: var(--primary-light);
    color: var(--bs-body-color);
    border-bottom-left-radius: 4px;
}

.chat-msg.user .chat-bubble {
    background: var(--primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

/* ========== Sidebar ========== */

.sidebar {
    display: flex;
    flex-direction: column;
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background: var(--sidebar-bg);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 16px;
    overflow-y: auto;
    z-index: 1040;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 4px 18px;
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    margin-bottom: 10px;
}

.sidebar-brand:hover {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
}

.sidebar-brand i {
    font-size: 1.5rem;
    color: var(--primary);
}

.sidebar .nav-link {
    color: var(--nav-link-color);
    border-radius: 10px;
    margin-bottom: 3px;
    padding: 9px 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    font-weight: 400;
    transition: background 0.15s, color 0.15s;
}

.sidebar .nav-link i {
    font-size: 1rem;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

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

.sidebar .nav-link.active {
    background: var(--nav-active-bg);
    color: var(--nav-active-color);
    font-weight: 500;
}

.sidebar .nav-link.active i {
    color: var(--primary);
}

.sidebar > .nav.flex-column {
    flex: 1;
    overflow-y: auto;
}

/* Sidebar section label */
.nav-section-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.35);
    padding: 14px 12px 4px;
}

.sidebar-footer {
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    flex-shrink: 0;
}

/* ========== Theme Toggle ========== */

.theme-toggle {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--nav-link-color);
    font-size: 0.95rem;
    padding: 0.3rem 0.55rem;
    border-radius: 8px;
    cursor: pointer;
    transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* ========== Content Area ========== */

.content {
    margin-left: var(--sidebar-width);
    padding: 24px;
    min-height: 100vh;
    font-size: 0.875rem;
    font-family: 'Inter', system-ui, sans-serif;
}

.content h1 { font-size: 1.5rem; }
.content h2 { font-size: 1.25rem; }
.content h3 { font-size: 1.1rem; }
.content h5, .content .card-title { font-size: 0.9375rem; }
.content h6 { font-size: 0.875rem; }

.content-footer {
    text-align: center;
    padding: 1.5rem 0 0.5rem;
    color: var(--bs-secondary-color);
    font-size: 0.75rem;
    margin-top: 2rem;
    border-top: 1px solid var(--bs-border-color);
}

/* ========== Mobile Topbar ========== */

.mobile-topbar {
    display: flex;
    align-items: center;
    background: var(--sidebar-bg);
    padding: 12px 16px;
    border-radius: 14px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, .08);
    margin-bottom: 18px;
}

/* ========== Sidebar Overlay (mobile) ========== */

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1039;
}

.sidebar-overlay.show {
    display: block;
}

/* ========== Responsive ========== */

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    .content {
        margin-left: 0;
    }
}

@media (min-width: 992px) {
    .mobile-topbar {
        display: none !important;
    }
    .sidebar {
        transform: none !important;
    }
}