/* ─── Navigation ──────────────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    max-width: 1200px;
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 1.2rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.navbar-brand .brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
}

.navbar-brand .brand-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.navbar-brand span {
    background: var(--grad-text);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-links {
    display: flex;
    align-items: center;
    gap: 0.2rem;
    list-style: none;
}

.navbar-links a {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

.navbar-links a:hover,
.navbar-links a.active {
    background: #f1f5f9;
    color: var(--text-primary);
}

.navbar-links a.active {
    color: var(--purple-1);
}

.navbar-cta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    border-top: 1px solid var(--border);
    padding: 1rem 1.5rem;
    gap: 0.25rem;
    backdrop-filter: blur(20px);
}

.mobile-menu a {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.mobile-menu a:hover {
    background: #f1f5f9;
    color: var(--text-primary);
}

@media (max-width: 900px) {
    .navbar-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu.open {
        display: flex;
    }

    .navbar-cta .btn {
        display: none;
    }
}

/* ─── Feature Cards (for index.html) ─────────────────────────────────────── */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 1.25rem;
}

.feature-card {
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    display: none;
}

.feature-card::after {
    display: none;
}

.feature-card .card-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    position: relative;
}

.icon-purple {
    background: #eef2ff;
    color: var(--purple-1);
}

.icon-cyan {
    background: #ecfeff;
    color: var(--cyan-1);
}

.icon-pink {
    background: #fdf2f8;
    color: var(--pink-1);
}

.icon-green {
    background: #ecfdf5;
    color: var(--green-1);
}

.icon-yellow {
    background: #fffbeb;
    color: #d97706;
}

.icon-blue {
    background: #eef2ff;
    color: #3b82f6;
}

.feature-card h3 {
    margin-bottom: 0.5rem;
}

.feature-card p {
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
}

.feature-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--purple-1);
    text-decoration: none;
    transition: var(--transition);
}

.feature-card .card-link:hover {
    gap: 0.65rem;
    color: var(--purple-2);
}

/* ─── Stats bar ───────────────────────────────────────────────────────────── */
.stats-bar {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 3rem;
    padding: 2.5rem 3rem;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.stats-bar::before {
    display: none;
}

.stat-item {
    text-align: center;
}

.stat-item .stat-number {
    font-size: 2.25rem;
    font-weight: 800;
    background: var(--grad-text);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-item .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
    font-weight: 500;
}

/* ─── Search Bar ──────────────────────────────────────────────────────────── */
.search-bar-wrap {
    position: relative;
    max-width: 640px;
    margin-inline: auto;
}

.search-bar-wrap .search-icon {
    position: absolute;
    left: 1.1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    pointer-events: none;
}

.search-bar-wrap input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border-radius: var(--radius-md);
    font-size: 1rem;
}

/* ─── Chip filters ────────────────────────────────────────────────────────── */
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    padding: 0.4rem 1rem;
    border-radius: 99px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: #ffffff;
    color: var(--text-secondary);
    transition: var(--transition);
    user-select: none;
}

.chip:hover {
    border-color: #c7d2fe;
    color: var(--text-primary);
    background: #f8fafc;
}

.chip.active {
    background: #eef2ff;
    border-color: var(--purple-1);
    color: var(--purple-1);
}

/* ─── AI Chat / Research ──────────────────────────────────────────────────── */
.ai-chat-wrap {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.ai-chat-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ai-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--green-1);
    animation: glow-pulse 2s infinite;
}

.ai-chat-body {
    padding: 1.5rem;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.ai-message {
    display: flex;
    gap: 0.75rem;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    color: #fff;
}

.ai-bubble {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 0 var(--radius-md) var(--radius-md) var(--radius-md);
    padding: 1rem 1.25rem;
    flex: 1;
    line-height: 1.7;
    font-size: 0.92rem;
}

.user-message .ai-bubble {
    background: #eef2ff;
    border-color: #e0e7ff;
    border-radius: var(--radius-md) 0 var(--radius-md) var(--radius-md);
    color: var(--text-primary);
}

.ai-typing span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--purple-1);
    animation: typing-bounce 1.2s infinite;
    margin-right: 3px;
}

.ai-typing span:nth-child(2) {
    animation-delay: 0.2s;
}

.ai-typing span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing-bounce {

    0%,
    60%,
    100% {
        transform: translateY(0);
    }

    30% {
        transform: translateY(-8px);
    }
}

.ai-input-row {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 0.75rem;
}

.ai-input-row input {
    flex: 1;
    border-radius: 99px;
    padding: 0.75rem 1.25rem;
}

.ai-input-row button {
    border-radius: 99px;
    padding: 0.75rem 1.5rem;
}

/* ─── Glossary Term Cards ─────────────────────────────────────────────────── */
.glossary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.term-card {
    padding: 1.5rem;
    cursor: default;
}

.term-card-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.term-card h3 {
    font-size: 1.1rem;
}

.term-card .term-def {
    font-size: 0.88rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.term-card.expanded .term-def {
    -webkit-line-clamp: unset;
}

.term-card .term-example {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    background: #f8fafc;
    border-left: 2px solid var(--purple-1);
    padding: 0.5rem 0.75rem;
    border-radius: 0 6px 6px 0;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    display: none;
}

.term-card.expanded .term-example {
    display: block;
}

.term-card .related-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    display: none;
}

.term-card.expanded .related-tags {
    display: flex;
}

.term-card .term-toggle {
    background: none;
    border: none;
    color: var(--purple-1);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    font-family: var(--font-main);
    margin-top: 0.5rem;
}

.term-card .term-toggle:hover {
    color: var(--purple-2);
}

/* ─── Letter Index ────────────────────────────────────────────────────────── */
.letter-index {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.letter-btn {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
    display: flex;
    align-items: center;
    justify-content: center;
}

.letter-btn:hover,
.letter-btn.active {
    background: #eef2ff;
    border-color: var(--purple-1);
    color: var(--purple-1);
}

/* ─── Job Board Cards ─────────────────────────────────────────────────────── */
.jobs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
}

.job-card {
    padding: 1.5rem;
}

.job-card-top {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.job-logo {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-sm);
    background: #f1f5f9;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
    overflow: hidden;
    line-height: 1;
    text-align: center;
}

.job-card h3 {
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.job-company {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.job-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.job-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 1rem;
}

.stack-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.2rem 0.5rem;
    border-radius: 5px;
    background: #ecfeff;
    border: 1px solid #cffafe;
    color: var(--cyan-1);
}

.job-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.salary {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--green-1);
}

.save-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.4rem 0.7rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    color: var(--text-muted);
}

.save-btn:hover,
.save-btn.saved {
    border-color: var(--yellow-1);
    background: #fffbeb;
    color: #d97706;
}

/* ─── Training / Community Feed ───────────────────────────────────────────── */
.feed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.feed-card {
    padding: 1.5rem;
}

.feed-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.confidence-bar-wrap {
    margin-top: 0.75rem;
}

.confidence-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
}

.confidence-bar {
    height: 4px;
    background: #e2e8f0;
    border-radius: 99px;
    overflow: hidden;
}

.confidence-fill {
    height: 100%;
    border-radius: 99px;
    background: var(--grad-primary);
    transition: width 1s ease;
}

.upvote-btn {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 99px;
    padding: 0.35rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
}

.upvote-btn:hover,
.upvote-btn.voted {
    background: #eef2ff;
    border-color: var(--purple-1);
    color: var(--purple-1);
}

/* ─── Leaderboard ─────────────────────────────────────────────────────────── */
.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: #ffffff;
    transition: var(--transition);
}

.leaderboard-item:hover {
    border-color: #c7d2fe;
    background: #fafaff;
}

.rank-badge {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 800;
    flex-shrink: 0;
}

.rank-1 {
    background: #fffbeb;
    color: #d97706;
}

.rank-2 {
    background: #f1f5f9;
    color: #64748b;
}

.rank-3 {
    background: #fef3c7;
    color: #b45309;
}

.rank-other {
    background: #f8fafc;
    color: var(--text-muted);
}

/* ─── Feedback Form ───────────────────────────────────────────────────────── */
.feedback-form-wrap {
    max-width: 680px;
    margin-inline: auto;
}

.form-row {
    margin-bottom: 1.25rem;
}

.rating-stars {
    display: flex;
    gap: 0.5rem;
}

.star-btn {
    font-size: 1.6rem;
    background: none;
    border: none;
    cursor: pointer;
    color: #cbd5e1;
    transition: var(--transition);
    line-height: 1;
}

.star-btn.active,
.star-btn:hover {
    color: var(--yellow-1);
    transform: scale(1.2);
}

.feedback-type-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.type-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    background: #ffffff;
}

.type-option:hover {
    border-color: #c7d2fe;
}

.type-option.selected {
    border-color: var(--purple-1);
    background: #eef2ff;
}

.type-option input {
    display: none;
}

.type-icon {
    font-size: 1.2rem;
}

.type-label {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ─── Footer ──────────────────────────────────────────────────────────────── */
footer {
    border-top: 1px solid var(--border);
    padding: 3rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
    background: #f8fafc;
}

footer a {
    color: var(--text-secondary);
    transition: var(--transition);
}

footer a:hover {
    color: var(--purple-1);
}

/* ─── Modal ───────────────────────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(6px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: all;
}

.modal-box {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    max-width: 560px;
    width: 100%;
    padding: 2rem;
    transform: scale(0.95);
    transition: var(--transition);
    box-shadow: var(--shadow-elevated);
}

.modal-overlay.open .modal-box {
    transform: scale(1);
}

.modal-close {
    float: right;
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

/* ─── Thread Writer Actions ───────────────────────────────────────────────── */
.generate-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 600px) {
    .generate-actions {
        flex-direction: column;
    }
    
    .generate-actions .btn {
        width: 100%;
        flex: none !important;
    }
}