/* ==========================================================================
   1. CORE UI VARIABLES (DARK NEON THEMING)
   ========================================================================= */
:root {
    --bg-main: #060814;
    --bg-surface: #0b0f24;
    --bg-surface-hover: #121838;
    
    /* Neon Branding Accents */
    --neon-blue: #3b82f6;
    --neon-purple: #7c3aed;
    --neon-indigo: #6366f1;
    --neon-mint: #10b981;
    --neon-cyan: #06b6d4;
    --accent-orange: #f59e0b;
    --accent-pink: #ec4899;
    
    /* Typography colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-glow: #1e293b;
    
    /* Layout Constants */
    --max-width: 1200px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-glow: 0 0 25px rgba(124, 58, 237, 0.25);
    --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   2. GLOBAL INITIALIZATION & TYPOGRAPHY
   ========================================================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 20% 50%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

.section-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
    text-align: center;
}

.section-title span {
    background: linear-gradient(135deg, #a78bfa 0%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 20px;
}

/* ==========================================================================
   3. NAVIGATION BAR
   ========================================================================= */
.navbar {
    background-color: rgba(6, 8, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 20px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.logo span {
    color: var(--neon-indigo);
}

.logo-icon {
    font-size: 1.75rem;
    color: var(--neon-indigo);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:hover, 
.nav-links a.active {
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
}

.nav-links a.active {
    position: relative;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-login {
    background: none;
    border: 1px solid var(--border-glow);
    color: var(--text-primary);
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-login:hover {
    background: rgba(255, 255, 255, 0.05);
}

.btn-signup {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-indigo));
    color: #fff;
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-signup:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

/* ==========================================================================
   4. HERO BANNER
   ========================================================================= */
.hero-section {
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.1), transparent 60%);
    padding: 80px 0 60px 0;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(124, 58, 237, 0.15);
    color: #a78bfa;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    border-radius: 50px;
    border: 1px solid rgba(124, 58, 237, 0.3);
    margin-bottom: 20px;
}

.hero-section h1 {
    font-size: 3.2rem;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-section .highlight {
    background: linear-gradient(135deg, #a78bfa 0%, #6366f1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    font-size: 1.15rem;
    max-width: 650px;
    margin: 0 auto;
}

/* ==========================================================================
   5. AI PLAYGROUND WIDGET
   ========================================================================= */
.ai-widget-section {
    padding: 20px 0 60px 0;
}

.ai-playground-card {
    background: linear-gradient(135deg, rgba(11, 15, 36, 0.8) 0%, rgba(6, 8, 20, 0.9) 100%);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5), inset 0 0 20px rgba(99, 102, 241, 0.05);
    position: relative;
    overflow: hidden;
}

.ai-playground-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.ai-widget-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.ai-left-desc h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-left-desc h2 i {
    color: var(--neon-purple);
    filter: drop-shadow(0 0 8px var(--neon-purple));
}

.ai-left-desc p {
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.ai-input-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ai-textarea-wrapper {
    position: relative;
}

.ai-textarea-wrapper textarea {
    width: 100%;
    height: 100px;
    background: rgba(6, 8, 20, 0.6);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 16px;
    font-family: inherit;
    color: var(--text-primary);
    font-size: 0.95rem;
    resize: none;
    outline: none;
    transition: var(--transition);
}

.ai-textarea-wrapper textarea:focus {
    border-color: var(--neon-purple);
    box-shadow: 0 0 15px rgba(124, 58, 237, 0.2);
}

.btn-ai-submit {
    align-self: flex-start;
    background: linear-gradient(135deg, var(--neon-indigo), var(--neon-purple));
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: var(--shadow-glow);
}

.btn-ai-submit:hover {
    filter: brightness(1.15);
    transform: translateY(-2px);
}

.ai-right-chat {
    background: rgba(6, 8, 20, 0.8);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    height: 250px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    background: rgba(11, 15, 36, 0.9);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-glow);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--neon-mint);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--neon-mint);
}

.chat-actions {
    display: flex;
    gap: 8px;
}

.chat-dot {
    width: 6px;
    height: 6px;
    background-color: var(--text-muted);
    border-radius: 50%;
}

.chat-body {
    padding: 16px;
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
    font-size: 0.9rem;
}

.message-ai {
    display: flex;
    gap: 12px;
}

.msg-avatar {
    width: 32px;
    height: 32px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--neon-purple);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.msg-bubble {
    background: var(--bg-surface);
    border: 1px solid var(--border-glow);
    padding: 12px 16px;
    border-radius: 0 12px 12px 12px;
    max-width: 85%;
    line-height: 1.5;
}

.msg-bubble p {
    margin-bottom: 0;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.chat-results {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mini-course-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(6, 8, 20, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.04);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    transition: var(--transition);
}

.mini-course-row:hover {
    border-color: rgba(99, 102, 241, 0.2);
    background: rgba(18, 24, 56, 0.4);
}

.mini-course-title {
    font-weight: 500;
    color: var(--text-primary);
}

.mini-course-meta {
    color: var(--neon-blue);
    font-weight: 600;
}

/* typing indicators */
.typing-dots {
    display: flex;
    gap: 4px;
    padding: 8px 0;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* ==========================================================================
   6. COURSES SYSTEM GRID & FILTERS LAYOUT
   ========================================================================= */
.main-content-section {
    padding-bottom: 100px;
}

.courses-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 36px;
    align-items: start;
}

/* 6a. Filters Sidebar */
.filters-sidebar {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    padding: 24px;
    position: sticky;
    top: 100px;
    z-index: 10;
}

.filters-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-glow);
    padding-bottom: 16px;
}

.filters-header h3 {
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-clear-filters {
    background: none;
    border: none;
    color: var(--neon-blue);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
}

.btn-clear-filters:hover {
    text-decoration: underline;
}

.filter-group {
    margin-bottom: 24px;
}

.filter-group h4 {
    font-size: 0.95rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.checkbox-label:hover {
    color: var(--text-primary);
}

.checkbox-label input {
    accent-color: var(--neon-indigo);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* 6b. Main Content Grid & Search */
.courses-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.search-sort-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 280px;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.2rem;
}

.search-box input {
    width: 100%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    padding: 14px 16px 14px 48px;
    font-family: inherit;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--neon-indigo);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

.sort-dropdown-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.sort-select {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    padding: 10px 16px;
    color: var(--text-primary);
    font-family: inherit;
    outline: none;
    cursor: pointer;
    transition: var(--transition);
}

.sort-select:focus {
    border-color: var(--neon-indigo);
}

/* Category Slider */
.category-filter-chips {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-glow) transparent;
}

/* Connected zero-to-career course planner */
.career-course-planner {
    padding: 28px;
    margin-bottom: 24px;
    border: 1px solid rgba(99, 102, 241, .35);
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, rgba(30, 41, 59, .72), rgba(11, 15, 36, .96));
    box-shadow: var(--shadow-card);
}

.planner-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 22px;
}

.planner-heading h2 { margin: 5px 0 7px; font-size: 1.55rem; }
.planner-heading p { margin: 0; }
.planner-eyebrow { color: #a78bfa; font-size: .73rem; font-weight: 800; letter-spacing: .13em; }
.career-picker { min-width: 250px; color: var(--text-secondary); font-size: .78rem; font-weight: 700; }
.career-picker span { display: block; margin-bottom: 7px; }
.career-picker select {
    width: 100%;
    padding: 12px 38px 12px 13px;
    border: 1px solid var(--border-glow);
    border-radius: 10px;
    color: var(--text-primary);
    background: var(--bg-surface);
}

.course-path { display: grid; gap: 12px; }
.path-step {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 17px;
    padding: 17px;
    border: 1px solid var(--border-glow);
    border-radius: 14px;
    background: rgba(6, 8, 20, .68);
}
.path-number { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: white; font-weight: 800; background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple)); }
.path-step-copy > span { color: var(--neon-cyan); font-size: .72rem; font-weight: 700; text-transform: uppercase; }
.path-step-copy h3 { margin: 3px 0 5px; font-size: 1rem; }
.path-step-copy p { margin: 0 0 8px; font-size: .82rem; }
.path-step-copy div { display: flex; flex-wrap: wrap; gap: 5px; }
.path-step-copy em { padding: 4px 7px; border-radius: 6px; color: #cbd5e1; background: rgba(99, 102, 241, .13); font-size: .68rem; font-style: normal; }
.course-language-suggestions { margin-top: 10px; padding: 9px 10px; border: 1px solid rgba(6,182,212,.2); border-radius: 9px; background: rgba(6,182,212,.06); }
.path-step-copy .course-language-suggestions strong { display: flex; align-items: center; gap: 6px; margin-bottom: 7px; color: #67e8f9; font-size: .7rem; }
.path-step-copy .course-language-suggestions > div { display: flex; gap: 5px; }
.path-step-copy .course-language-suggestions span { padding: 4px 7px; border-radius: 6px; color: #cffafe; background: rgba(6,182,212,.13); font-size: .66rem; }
.card-language-suggestions { margin-top: 12px; padding: 10px; border: 1px solid rgba(6,182,212,.18); border-radius: 9px; background: rgba(6,182,212,.055); }
.card-language-suggestions > span { display: flex; align-items: center; gap: 6px; margin-bottom: 7px; color: #67e8f9; font-size: .72rem; font-weight: 700; }
.card-language-suggestions > div { display: flex; flex-wrap: wrap; gap: 5px; }
.card-language-suggestions em { padding: 4px 7px; border-radius: 5px; color: #cffafe; background: rgba(6,182,212,.12); font-size: .65rem; font-style: normal; }
.path-step button, .open-full-roadmap {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 13px;
    border: 1px solid rgba(99, 102, 241, .45);
    border-radius: 9px;
    color: white;
    background: rgba(99, 102, 241, .12);
    cursor: pointer;
    font-weight: 700;
}
.path-step button:hover, .open-full-roadmap:hover { background: var(--neon-indigo); }
.open-full-roadmap { justify-self: start; margin-top: 3px; }
.planner-error { padding: 18px; color: #fca5a5; }

@media (max-width: 760px) {
    .career-course-planner { padding: 20px; }
    .planner-heading { align-items: stretch; flex-direction: column; }
    .career-picker { min-width: 0; }
    .path-step { grid-template-columns: auto 1fr; }
    .path-step button { grid-column: 1 / -1; width: 100%; }
}

.category-filter-chips::-webkit-scrollbar {
    height: 4px;
}

.category-filter-chips::-webkit-scrollbar-thumb {
    background-color: var(--border-glow);
    border-radius: 4px;
}

.chip {
    padding: 10px 20px;
    border-radius: 50px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: var(--transition);
}

.chip:hover {
    border-color: var(--neon-indigo);
    color: var(--text-primary);
}

.chip.active {
    background: linear-gradient(135deg, var(--neon-indigo), var(--neon-purple));
    border-color: transparent;
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.25);
}

/* Result Stats Bar */
.results-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-glow);
    padding-bottom: 12px;
}

.results-count span {
    font-weight: 600;
    color: var(--text-primary);
}

.bookmark-summary {
    display: flex;
    align-items: center;
    gap: 6px;
    background-color: rgba(236, 72, 153, 0.08);
    border: 1px solid rgba(236, 72, 153, 0.2);
    color: var(--accent-pink);
    padding: 4px 12px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.85rem;
}

.bookmark-summary i {
    animation: heartBeat 2s infinite;
}

@keyframes heartBeat {
    0% { transform: scale(1); }
    14% { transform: scale(1.12); }
    28% { transform: scale(1); }
    42% { transform: scale(1.12); }
    70% { transform: scale(1); }
}

/* 6c. Course Cards Grid */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.course-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.course-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 20px rgba(99, 102, 241, 0.1);
}

.card-img-wrapper {
    position: relative;
    height: 160px;
    overflow: hidden;
    background: linear-gradient(135deg, #090b1c 0%, #1e1b4b 100%);
}

.card-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    transition: var(--transition);
}

.course-card:hover .card-img-wrapper img {
    transform: scale(1.05);
    opacity: 0.8;
}

.card-decorations {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 2;
}

.platform-pill {
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 4px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.platform-pill.coursera { background-color: #0056d2; color: #fff; }
.platform-pill.udemy { background-color: #a435f0; color: #fff; }
.platform-pill.edx { background-color: #e31837; color: #fff; }
.platform-pill.youtube { background-color: #ff0000; color: #fff; }
.platform-pill.nptel { background-color: #f39c12; color: #fff; }
.platform-pill.google { background-color: #4285f4; color: #fff; }

.btn-bookmark {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: rgba(6, 8, 20, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.btn-bookmark:hover {
    background-color: rgba(6, 8, 20, 0.9);
    border-color: rgba(236, 72, 153, 0.5);
    color: var(--accent-pink);
    transform: scale(1.1);
}

.btn-bookmark.active {
    background-color: rgba(236, 72, 153, 0.1);
    border-color: rgba(236, 72, 153, 0.3);
    color: var(--accent-pink);
}

.card-level-tag {
    position: absolute;
    bottom: 12px;
    left: 12px;
    padding: 4px 8px;
    background: rgba(6, 8, 20, 0.85);
    border: 1px solid var(--border-glow);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-primary);
}

.card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--neon-blue);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.course-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    min-height: 48px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-instructor {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.card-instructor i {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.card-rating-block {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 0.85rem;
}

.stars-wrapper {
    color: var(--accent-orange);
    display: flex;
    gap: 2px;
}

.rating-numeric {
    font-weight: 700;
    color: var(--text-primary);
}

.rating-reviews {
    color: var(--text-muted);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
    margin-top: auto;
}

.card-tag {
    background-color: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 4px;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border-glow);
    padding-top: 16px;
}

.course-price {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.price-value {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
}

.price-value.free {
    color: var(--neon-mint);
}

.btn-enroll {
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-indigo));
    color: #fff;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
    transition: var(--transition);
}

.btn-enroll:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

/* Empty State */
.courses-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 40px;
    background-color: var(--bg-surface);
    border: 1px dashed var(--border-glow);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.empty-icon {
    font-size: 3.5rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.courses-empty-state h3 {
    font-size: 1.35rem;
    margin-bottom: 8px;
}

.courses-empty-state p {
    font-size: 0.95rem;
    max-width: 350px;
    margin-bottom: 24px;
}

/* ==========================================================================
   7. BLUE CTA BANNER
   ========================================================================= */
.cta-banner {
    background: linear-gradient(90deg, #1e3a8a 0%, #0f172a 100%);
    border-top: 1px solid var(--border-glow);
    border-bottom: 1px solid var(--border-glow);
    padding: 80px 0;
}

.cta-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 48px;
}

.cta-flex h2 {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.cta-flex p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-bottom: 0;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    flex-shrink: 0;
}

.btn-white {
    background-color: var(--text-primary);
    color: var(--bg-main);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-white:hover {
    background-color: var(--text-secondary);
    transform: translateY(-2px);
}

.btn-outline-white {
    background-color: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-glow);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline-white:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--text-secondary);
    transform: translateY(-2px);
}

/* ==========================================================================
   8. FOOTER PIPELINES
   ========================================================================= */
.footer {
    background-color: #03040b;
    border-top: 1px solid var(--border-glow);
    padding: 80px 0 40px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 0.8fr 0.8fr 1.1fr;
    gap: 64px;
    border-bottom: 1px solid var(--border-glow);
    padding-bottom: 60px;
}

.footer-brand .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-weight: 800;
    font-size: 1.4rem;
    margin-bottom: 24px;
}

.footer-brand p {
    margin-bottom: 28px;
}

.footer-socials {
    display: flex;
    gap: 16px;
}

.footer-socials a {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.footer-socials a:hover {
    color: var(--text-primary);
    border-color: var(--neon-blue);
    background-color: rgba(59, 130, 246, 0.1);
}

.footer h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 24px;
}

.footer-links, .footer-contact {
    list-style: none;
}

.footer-links li {
    margin-bottom: 14px;
}

.footer-links a:hover {
    color: var(--text-primary);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.footer-contact li i {
    color: var(--neon-blue);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 40px;
}

.scroll-up {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.scroll-up:hover {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
    transform: translateY(-3px);
}

/* Hamburger menu button for responsive nav */
.hamburger {
    display: none;
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
    background: var(--bg-surface);
    border: 1px solid var(--border-glow);
    width: 44px;
    height: 44px;
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

.hamburger .lines {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    position: relative;
    transition: var(--transition);
}

.hamburger .lines::before,
.hamburger .lines::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

.hamburger .lines::before { top: -6px; }
.hamburger .lines::after { top: 6px; }

/* ==========================================================================
   9. RESPONSIVE DESIGN
   ========================================================================= */
@media (max-width: 1024px) {
    .courses-layout {
        grid-template-columns: 240px 1fr;
        gap: 24px;
    }
    
    .ai-widget-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-section h1 {
        font-size: 2.7rem;
    }
}

@media (max-width: 900px) {
    .nav-links, .nav-actions {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 15px 0;
    }
    
    /* Toggle Mobile Navigation via hamburger (Disabled for unified sidebar) */
    .hamburger {
        display: none !important;
    }
    
    .nav-links.mobile-active {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: rgba(6, 8, 20, 0.98);
        z-index: 1000;
        justify-content: center;
        align-items: center;
        gap: 30px;
    }
    
    .courses-layout {
        grid-template-columns: 1fr;
    }
    
    .filters-sidebar {
        position: static;
        margin-bottom: 24px;
    }
    
    .cta-flex {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 580px) {
    .container {
        padding-left: 18px;
        padding-right: 18px;
    }

    .ai-widget-section.container {
        padding-left: 14px;
        padding-right: 14px;
    }

    .hero-section {
        padding: 58px 0 44px;
    }

    .hero-section h1 {
        font-size: 2.15rem;
        letter-spacing: -0.04em;
        overflow-wrap: anywhere;
    }

    .hero-section p {
        font-size: 1rem;
    }

    .ai-playground-card {
        padding: 22px;
    }

    .ai-widget-grid > *,
    .courses-container {
        min-width: 0;
    }

    .ai-left-desc h2 {
        font-size: 1.5rem;
    }

    .btn-ai-submit {
        width: 100%;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .search-sort-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .sort-dropdown-wrapper {
        justify-content: space-between;
    }
}
/* Career field gateway: tech stays in the existing catalog; non-tech opens its curriculum engine. */
.field-choice-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:22px;padding:22px 24px;border:1px solid rgba(139,92,246,.24);border-radius:18px;background:linear-gradient(120deg,rgba(124,58,237,.1),rgba(37,99,235,.08))}.field-choice-bar h2{margin:5px 0 0;font-size:22px}.field-choice-buttons{display:flex;gap:10px}.field-choice{min-width:170px;display:flex;align-items:center;gap:11px;text-align:left;text-decoration:none;padding:12px 15px;border:1px solid rgba(255,255,255,.12);border-radius:12px;background:rgba(12,14,28,.7);color:#d9dbea;cursor:pointer}.field-choice.active{border-color:#8b5cf6;background:rgba(124,58,237,.2);box-shadow:0 0 0 2px rgba(139,92,246,.08)}.field-choice i{font-size:19px;color:#a78bfa}.field-choice span,.field-choice small{display:block}.field-choice small{margin-top:2px;color:#9297ab;font-size:11px}.field-choice:hover{border-color:#8b5cf6;transform:translateY(-1px)}
@media(max-width:700px){.field-choice-bar{align-items:flex-start;flex-direction:column}.field-choice-buttons{width:100%}.field-choice{min-width:0;flex:1;padding:11px}.field-choice-bar h2{font-size:19px}}