/* --- System Variables --- */
:root {
    --bg-color: #0b0f19;
    --surface-color: #151b2b;
    --accent-blue: #00f0ff;
    --accent-orange: #ff5e00;
    --text-color: #e2e8f0;
    --text-muted: #94a3b8;
    --glow-blue: rgba(0, 240, 255, 0.4);
    --glow-orange: rgba(255, 94, 0, 0.4);
    --glass: rgba(15, 20, 30, 0.6);
}

/* --- Anime Flavor Themes --- */
[data-theme="unit-01"] { --bg-color: #0b0710; --surface-color: #1a1025; --accent-blue: #76ff03; --accent-orange: #d500f9; --glow-blue: rgba(118, 255, 3, 0.4); --glow-orange: rgba(213, 0, 249, 0.4); }
[data-theme="edgerunner"] { --bg-color: #0a0a0a; --surface-color: #141414; --accent-blue: #00f0ff; --accent-orange: #ffe600; --glow-blue: rgba(0, 240, 255, 0.4); --glow-orange: rgba(255, 230, 0, 0.4); }
[data-theme="uchiha"] { --bg-color: #050101; --surface-color: #120303; --accent-blue: #ff1744; --accent-orange: #ff9100; --glow-blue: rgba(255, 23, 68, 0.4); --glow-orange: rgba(255, 145, 0, 0.4); }
[data-theme="shinigami"] { --bg-color: #ffffff; --surface-color: #f0f0f0; --accent-blue: #000000; --accent-orange: #d50000; --text-color: #000; --text-muted: #555; --glow-blue: rgba(0, 0, 0, 0.4); --glow-orange: rgba(213, 0, 0, 0.4); --glass: rgba(0, 0, 0, 0.05); }
[data-theme="fullmetal"] { --bg-color: #100b0b; --surface-color: #1c1313; --accent-blue: #ff2a2a; --accent-orange: #ffc400; --glow-blue: rgba(255, 42, 42, 0.4); --glow-orange: rgba(255, 196, 0, 0.4); }
[data-theme="titan"] { --bg-color: #0a0d0a; --surface-color: #121712; --accent-blue: #64dd17; --accent-orange: #b71c1c; --glow-blue: rgba(100, 221, 23, 0.4); --glow-orange: rgba(183, 28, 28, 0.4); }
[data-theme="saiyan"] { --bg-color: #000b18; --surface-color: #001730; --accent-blue: #ff9100; --accent-orange: #2979ff; --glow-blue: rgba(255, 145, 0, 0.4); --glow-orange: rgba(41, 121, 255, 0.4); }
[data-theme="stand-user"] { --bg-color: #120012; --surface-color: #240024; --accent-blue: #f50057; --accent-orange: #ffea00; --glow-blue: rgba(245, 0, 87, 0.4); --glow-orange: rgba(255, 234, 0, 0.4); }
[data-theme="section-9"] { --bg-color: #050a07; --surface-color: #0a140f; --accent-blue: #00e676; --accent-orange: #4db6ac; --glow-blue: rgba(0, 230, 118, 0.4); --glow-orange: rgba(77, 182, 172, 0.4); }
[data-theme="plus-ultra"] { --bg-color: #001220; --surface-color: #00223b; --accent-blue: #00b4d8; --accent-orange: #ef233c; --glow-blue: rgba(0, 180, 216, 0.4); --glow-orange: rgba(239, 35, 60, 0.4); }
[data-theme="akira"] { --bg-color: #0a0202; --surface-color: #1c0505; --accent-blue: #ff0000; --accent-orange: #00e5ff; --glow-blue: rgba(255, 0, 0, 0.4); --glow-orange: rgba(0, 229, 255, 0.4); }
[data-theme="demon-slayer"] { --bg-color: #050a0d; --surface-color: #0a141a; --accent-blue: #1de9b6; --accent-orange: #ff3d00; --glow-blue: rgba(29, 233, 182, 0.4); --glow-orange: rgba(255, 61, 0, 0.4); }

/* --- Base & 3D Environment --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    perspective: 1200px;
}

.system-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100%;
    height: 100dvh;
    z-index: -1;
    background-size: cover;
    background-position: center;
    transition: background-image 1s ease-in-out;
    filter: brightness(0.6) saturate(1.2);
}

.system-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 7, 12, 0.70);
    z-index: 0;
}

h1, h2, h3, p {
    text-shadow: 0px 2px 4px rgba(0,0,0,0.8);
}

.system-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    transform-style: preserve-3d;
}

/* --- Navigation --- */
.top-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 15, 25, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 210, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
}

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

.nav-title {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--accent-blue);
    text-shadow: 0 0 10px var(--glow-blue);
    letter-spacing: 2px;
}

.login-trigger, #theme-toggle {
    background: transparent;
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
    padding: 8px 15px;
    border-radius: 4px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1px;
}

.login-trigger:hover, #theme-toggle:hover {
    background: rgba(0, 210, 255, 0.1);
    box-shadow: 0 0 15px var(--glow-blue);
}

/* --- Auth Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100%;
    height: 100dvh;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-box {
    background: rgba(15, 20, 30, 0.85);
    backdrop-filter: blur(15px);
    width: 90%;
    max-width: 500px;
    max-height: 90dvh;
    overflow-y: auto;
    padding: 40px;
    border-radius: 12px;
    border: 1px solid #76ff03;
    box-shadow: 0 0 40px rgba(118, 255, 3, 0.2);
    position: relative;
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

.close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: #76ff03;
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.auth-view {
    display: none;
}

.auth-view.active {
    display: block;
}

.modal-box h2 {
    color: #76ff03;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.5rem;
    text-align: center;
    font-weight: 900;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: #76ff03;
    margin-bottom: 8px;
    font-weight: 700;
    text-transform: uppercase;
}

.form-group input, 
.form-group select {
    width: 100%;
    background: #1e1326;
    border: 1px solid rgba(118, 255, 3, 0.2);
    padding: 12px;
    color: #fff;
    border-radius: 4px;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus, 
.form-group select:focus {
    outline: none;
    border-color: #76ff03;
    box-shadow: 0 0 10px rgba(118, 255, 3, 0.4);
    background: #251a2f;
}

.form-row {
    display: flex;
    gap: 15px;
}

.auth-btn {
    width: 100%;
    background: #76ff03;
    color: #000;
    border: none;
    padding: 14px;
    border-radius: 4px;
    font-weight: 900;
    text-transform: uppercase;
    cursor: pointer;
    letter-spacing: 2px;
    transition: all 0.3s;
    margin-top: 10px;
}

.auth-btn:hover {
    box-shadow: 0 0 25px rgba(118, 255, 3, 0.6);
    transform: translateY(-2px);
}

.switch-view {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-color);
}

.switch-view a {
    color: #76ff03;
    text-decoration: none;
    font-weight: 700;
}

.switch-view a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}

/* --- Hero: The Architect's Entry --- */
.hero-landing {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 80px 0;
    margin-bottom: 100px;
}

.avatar-frame {
    position: relative;
    width: 280px;
    height: 280px;
    margin-bottom: 40px;
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    background: var(--accent-blue);
    padding: 4px;
    animation: frameGlow 4s infinite alternate;
}

.avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
    background: var(--bg-color);
}

@keyframes frameGlow {
    0% { filter: drop-shadow(0 0 5px var(--glow-blue)); }
    100% { filter: drop-shadow(0 0 20px var(--glow-blue)); }
}

.architect-name {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.architect-subtitle {
    font-size: 1.2rem;
    color: var(--accent-blue);
    font-weight: 700;
    letter-spacing: 4px;
}

/* --- Manifesto: Two-Column 3D Tilt --- */
.manifesto-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 120px;
    transform-style: preserve-3d;
}

.manifesto-card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    padding: 40px;
    border-radius: 4px;
    border: 1px solid rgba(0, 210, 255, 0.2);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.manifesto-card h2 {
    color: var(--accent-blue);
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    border-bottom: 1px solid var(--accent-blue);
    display: inline-block;
}

/* --- Status Ribbon / Credential Ribbon --- */
.status-ribbon {
    width: 100%;
    background: rgba(0, 210, 255, 0.05);
    border-top: 1px solid rgba(0, 210, 255, 0.2);
    border-bottom: 1px solid rgba(0, 210, 255, 0.2);
    padding: 20px 0;
    margin-bottom: 100px;
    overflow: hidden;
    white-space: nowrap;
}

.ribbon-track {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.tag-badge {
    color: var(--accent-blue);
    font-size: 0.8rem;
    font-weight: 800;
    padding: 5px 15px;
    border: 1px solid var(--accent-blue);
    background: rgba(0, 210, 255, 0.1);
    box-shadow: 0 0 10px var(--glow-blue);
    text-transform: uppercase;
    opacity: 0;
}

/* --- CTA Section --- */
.sanctuary-cta {
    text-align: center;
    padding: 100px 0;
}

.enter-btn {
    position: relative;
    background: var(--accent-orange);
    color: #fff;
    padding: 25px 60px;
    font-size: 1.5rem;
    font-weight: 900;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 0 30px var(--glow-orange);
    animation: intensePulse 2s infinite;
}

@keyframes intensePulse {
    0% { transform: scale(1); box-shadow: 0 0 20px var(--glow-orange); }
    50% { transform: scale(1.05); box-shadow: 0 0 60px var(--glow-orange); }
    100% { transform: scale(1); box-shadow: 0 0 20px var(--glow-orange); }
}

/* --- Utilities & Reveal --- */
.reveal {
    opacity: 0;
    transform: translateZ(-150px) rotateX(10deg) translateY(40px);
    transition: all 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateZ(0) rotateX(0) translateY(0);
}

.reveal-smooth {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal-smooth.active {
    opacity: 1;
    transform: translateY(0);
}

/* --- Features Grid --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 120px;
    transform-style: preserve-3d;
}

.feature-card {
    background: var(--glass);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    text-align: center;
    transform-style: preserve-3d;
}

.feature-card:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 0 25px var(--glow-blue);
    transform: translateY(-10px) scale(1.02);
}

.feature-card h3 {
    color: var(--accent-blue);
    margin-bottom: 15px;
    font-size: 1.2rem;
    text-transform: uppercase;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-color);
}
.mentor-projection {
    transition: opacity 0.5s ease-in-out, transform 0.5s ease, filter 0.5s ease;
}

.feature-image {
    width: 100%;
...
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    filter: grayscale(0.5) contrast(1.2);
    transition: filter 0.3s ease;
    border: 1px solid rgba(255,255,255,0.1);
}

.feature-card:hover .feature-image {
    filter: grayscale(0);
}

/* --- Terminal Footer --- */
.system-footer {
    background: #070a10;
    padding: 60px 20px 30px;
    border-top: 1px solid rgba(0, 210, 255, 0.2);
    text-align: center;
    position: relative;
    z-index: 10;
}

.terminal-status {
    font-family: 'Courier New', Courier, monospace;
    color: var(--accent-blue);
    font-size: 0.9rem;
    margin-bottom: 30px;
    letter-spacing: 1px;
}

.terminal-status::after {
    content: '_';
    animation: blink 1s infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: 30px;
}

.social-icon {
    width: 40px;
    height: 40px;
    border: 1px solid var(--accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-orange);
    transition: all 0.3s;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 900;
}

.social-icon:hover {
    background: var(--accent-orange);
    color: #fff;
    box-shadow: 0 0 15px var(--glow-orange);
    transform: translateY(-5px);
}

.copyright {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.3);
    letter-spacing: 1px;
}

.footer-asset {
    width: 120px;
    position: absolute;
    bottom: 20px;
    right: 5%;
    filter: drop-shadow(0 0 10px var(--glow-blue));
    pointer-events: none;
}

/* --- Architect Profile --- */
.architect-profile {
    background: var(--glass);
    backdrop-filter: blur(10px);
    padding: 60px 40px;
    border-radius: 20px;
    border: 1px solid rgba(0, 210, 255, 0.3);
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 80px;
    box-shadow: 0 0 30px rgba(0, 210, 255, 0.2);
    transform-style: preserve-3d;
}

.architect-avatar {
    border: 2px solid var(--accent-blue);
    box-shadow: 0 0 30px var(--glow-blue);
    overflow: hidden;
}

.architect-details h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 5px;
}

.architect-details .role {
    font-size: 0.9rem;
    color: var(--accent-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 25px;
    display: block;
    font-weight: 700;
}

.expertise-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 30px;
}

.expertise-badge {
    background: rgba(0, 210, 255, 0.1);
    border: 1px solid rgba(0, 210, 255, 0.3);
    padding: 8px 16px;
    border-radius: 4px;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--accent-blue);
    transition: all 0.3s;
    opacity: 0;
    transform: scale(0.8);
    text-transform: uppercase;
}

.architect-profile.active .expertise-badge {
    animation: badgePop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes badgePop {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.expertise-badge:hover {
    background: var(--accent-blue);
    color: var(--bg-color);
    box-shadow: 0 0 15px var(--glow-blue);
    transform: translateY(-3px) scale(1.05) !important;
}

.about-snippet {
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.6;
    border-left: 2px solid var(--accent-blue);
    padding-left: 20px;
    font-style: italic;
}

/* --- Initiation / Welcome Page --- */
.initiation-card {
    background: rgba(15, 20, 30, 0.85);
    backdrop-filter: blur(20px);
    width: 90%;
    max-width: 800px;
    padding: 60px;
    border-radius: 4px;
    border: 1px solid var(--accent-blue);
    box-shadow: 0 0 50px rgba(0, 210, 255, 0.2);
    text-align: center;
    transform-style: preserve-3d;
}

.initiation-card h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 900;
    color: var(--accent-blue);
    text-shadow: 0 0 20px var(--glow-blue);
    margin-bottom: 30px;
    letter-spacing: 2px;
}

.initiation-card p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 25px;
    color: var(--text-color);
}

.cta-button {
    background: var(--accent-orange);
    color: #fff;
    padding: 20px 50px;
    font-size: 1.2rem;
    font-weight: 900;
    text-transform: uppercase;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    letter-spacing: 2px;
    box-shadow: 0 0 30px var(--glow-orange);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cta-button:hover {
    transform: scale(1.05) translateY(-5px);
    box-shadow: 0 0 50px var(--glow-orange);
}

@media (max-width: 768px) {
    .initiation-card { padding: 40px 20px; }
}

/* --- Library / Master Archive --- */
.library-header {
    text-align: center;
    padding: 60px 20px;
    margin-bottom: 40px;
}

.library-header h1 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 900;
    color: var(--accent-blue);
    text-shadow: 0 0 20px var(--glow-blue);
    text-transform: uppercase;
    letter-spacing: 4px;
}

.curriculum-tree {
    max-width: 900px;
    margin: 0 auto 100px;
}

.phase-block {
    margin-bottom: 20px;
    border: 1px solid rgba(0, 210, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.phase-header {
    background: var(--glass);
    backdrop-filter: blur(15px);
    padding: 25px 30px;
    display: flex;
    align-items: center;
    cursor: pointer;
    border-left: 4px solid var(--accent-blue);
    transition: background 0.3s ease;
}

.phase-header:hover {
    background: rgba(0, 210, 255, 0.05);
}

.phase-number {
    font-family: 'Courier New', Courier, monospace;
    font-weight: 900;
    font-size: 1.2rem;
    color: var(--accent-blue);
    margin-right: 20px;
}

.phase-title {
    font-size: 1.1rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.phase-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0, 1, 0, 1);
    background: rgba(11, 15, 25, 0.4);
}

.phase-block.active .phase-content {
    max-height: 1000px;
    transition: max-height 1s ease-in-out;
}

.topic-list {
    list-style: none;
    padding: 20px 30px 30px 70px;
}

.topic-item {
    margin-bottom: 15px;
}

.topic-link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    display: inline-block;
    position: relative;
    transition: color 0.2s ease;
}

.topic-link:hover {
    color: var(--accent-orange);
    text-shadow: 0 0 10px var(--glow-orange);
    animation: textGlitch 0.3s infinite;
}

@keyframes textGlitch {
    0% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
    100% { transform: translate(0); }
}

@media (max-width: 768px) {
    .hero-landing { padding: 40px 0; }
    .manifesto-grid, .features-grid { grid-template-columns: 1fr; }
    .architect-profile { grid-template-columns: 1fr; }
    .modal-box { width: 95%; padding: 20px; }
    .avatar-frame { width: 220px; height: 220px; }
    .architect-name { font-size: 2.2rem; }
    .footer-asset { display: none; }
    .topic-list { padding-left: 30px; }
}

/* --- Quiz Engine (Challenge Protocol) --- */
.quiz-container {
    background: var(--glass);
    border: 1px solid var(--accent-blue);
    padding: 30px;
    border-radius: 12px;
    margin-top: 50px;
}

.quiz-header {
    border-bottom: 1px solid var(--accent-blue);
    padding-bottom: 15px;
    margin-bottom: 25px;
}

.question-block {
    margin-bottom: 30px;
    display: none; /* Controlled by JS */
}

.question-block.active {
    display: block;
    animation: revealSmooth 0.5s forwards;
}

.question-text {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.option-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.option-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 210, 255, 0.3);
    padding: 15px;
    border-radius: 4px;
    color: var(--text-color);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    text-align: left;
}

.option-btn:hover {
    background: rgba(0, 210, 255, 0.1);
    border-color: var(--accent-blue);
}

.option-btn.correct {
    background: rgba(118, 255, 3, 0.2);
    border-color: #76ff03;
    color: #76ff03;
}

.option-btn.wrong {
    background: rgba(255, 94, 0, 0.2);
    border-color: var(--accent-orange);
    color: var(--accent-orange);
}

.quiz-feedback {
    margin-top: 20px;
    padding: 15px;
    border-radius: 4px;
    font-weight: 700;
    display: none;
    border-left: 4px solid;
}

.quiz-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

@media (max-width: 600px) {
    .option-list { grid-template-columns: 1fr; }
}

/* --- Script Lesson Page Styles --- */
.script-container {
    background: rgba(15, 20, 30, 0.7);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 60px;
    border-radius: 12px;
    margin-bottom: 50px;
}

.script-container h2 {
    color: #76ff03;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin: 40px 0 20px;
    border-bottom: 1px solid rgba(118, 255, 3, 0.3);
    padding-bottom: 10px;
}

.construction-list {
    list-style: none;
    padding: 0;
}

.construction-list li {
    margin-bottom: 20px;
    padding-left: 40px;
    position: relative;
    font-size: 1.1rem;
}

.construction-list li::before {
    content: '⚡';
    position: absolute;
    left: 0;
    color: #76ff03;
}

/* Pronoun Grid Table */
.pronoun-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin: 30px 0;
}

.pronoun-cell {
    background: var(--surface-color);
    padding: 15px;
    text-align: center;
    font-weight: 700;
}

.pronoun-header {
    background: rgba(0, 210, 255, 0.1);
    color: var(--accent-blue);
    font-size: 0.8rem;
    text-transform: uppercase;
}

/* Code block terminal style */
pre code {
    display: block;
    background: #070a10;
    padding: 20px;
    border-radius: 4px;
    border-left: 4px solid var(--accent-orange);
    color: #fff;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
    margin: 20px 0;
}

.challenge-selector {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-top: 40px;
}

.set-btn {
    background: transparent;
    border: 1px solid var(--accent-blue);
    color: var(--accent-blue);
    padding: 15px 25px;
    border-radius: 4px;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.3s;
}

.set-btn:hover {
    background: var(--accent-blue);
    color: #000;
    box-shadow: 0 0 20px var(--glow-blue);
}

/* --- Visual Grammar Utilities --- */

/* 1. Flowchart Container */
.grammar-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.flow-node {
    background: var(--glass);
    border: 2px solid var(--accent-blue);
    padding: 15px 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 0 15px var(--glow-blue);
    position: relative;
    min-width: 120px;
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--accent-orange);
    text-shadow: 0 0 10px var(--glow-orange);
}

/* 2. Branching Tree Structure */
.grammar-tree {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 40px 0;
}

.tree-root {
    background: var(--accent-orange);
    color: #fff;
    padding: 15px 30px;
    border-radius: 4px;
    font-weight: 900;
    margin-bottom: 30px;
    box-shadow: 0 0 20px var(--glow-orange);
}

.tree-branches {
    display: flex;
    justify-content: center;
    gap: 30px;
    width: 100%;
    flex-wrap: wrap;
}

.tree-branch {
    background: var(--glass);
    border: 1px solid var(--accent-blue);
    padding: 15px;
    border-radius: 4px;
    text-align: center;
    min-width: 150px;
    position: relative;
}

.tree-branch::before {
    content: '';
    position: absolute;
    top: -30px;
    left: 50%;
    width: 2px;
    height: 30px;
    background: var(--accent-blue);
}

/* 3. Comparison / Concept Table */
.grammar-table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: var(--glass);
    border: 1px solid rgba(255,255,255,0.1);
}

.grammar-table th {
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-blue);
    padding: 15px;
    text-align: left;
    border-bottom: 2px solid var(--accent-blue);
    text-transform: uppercase;
    font-size: 0.8rem;
}

.grammar-table td {
    padding: 15px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.grammar-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* 4. Highlight Pill */
.accent-pill {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 800;
    margin-left: 10px;
}

.pill-blue { background: var(--accent-blue); color: #000; }
.pill-orange { background: var(--accent-orange); color: #fff; }