:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-card: #050505;
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --accent: #d4ff00;
    /* Neon Yellow-Green */
    --accent-glow: rgba(212, 255, 0, 0.4);
    --success: #00ff66;
    --danger: #ff0033;
    --border: #1a1a1a;
    --card-shadow: 0 0 15px rgba(0, 0, 0, 1), 0 0 5px rgba(212, 255, 0, 0.1);
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    background: radial-gradient(circle at 50% 50%, #080808 0%, #000000 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    cursor: none;
    /* Hide default cursor */
}

a,
button,
input,
textarea,
[role="button"],
.card,
.landing-card {
    cursor: none !important;
    /* Force hide on interactive elements */
}

/* Custom Cursor */
.cursor-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    position: fixed;
    top: 0;
    left: 0;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: 10000;
    pointer-events: none;
    transition: width 0.3s, height 0.3s, background-color 0.3s;
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 1.5px solid var(--accent);
    position: fixed;
    top: 0;
    left: 0;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    z-index: 9999;
    pointer-events: none;
    transition: all 0.2s cubic-bezier(0.19, 1, 0.22, 1);
    opacity: 0.8;
    mix-blend-mode: difference;
}

/* Cursor States */
.cursor-dot.cursor-hover {
    width: 12px;
    height: 12px;
    background-color: #fff;
}

.cursor-outline.cursor-hover {
    width: 60px;
    height: 60px;
    background-color: rgba(212, 255, 0, 0.1);
    border-color: #fff;
    opacity: 0.8;
}

.cursor-dot.cursor-active {
    transform: translate(-50%, -50%) scale(0.5);
}

.cursor-outline.cursor-active {
    transform: translate(-50%, -50%) scale(1.2);
    border-color: #fff;
}

body::before,
body::after,
.aura-3 {
    content: '';
    position: fixed;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    background: var(--accent);
    filter: blur(150px);
    z-index: -1;
    opacity: 0.12;
    pointer-events: none;
    animation: auraMove 25s infinite alternate ease-in-out;
}

body::before {
    top: -20vh;
    left: -10vw;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
}

body::after {
    bottom: -20vh;
    right: -10vw;
    animation-delay: -12s;
    opacity: 0.08;
    background: radial-gradient(circle, #00ffaa 0%, transparent 70%);
}

.aura-3 {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40vw;
    height: 40vw;
    opacity: 0.05;
    background: radial-gradient(circle, #00d4ff 0%, transparent 70%);
    animation: auraFloat 20s infinite alternate ease-in-out;
}

@keyframes auraMove {
    0% {
        transform: translate(0, 0) scale(1) rotate(0deg);
    }

    50% {
        transform: translate(10vw, 15vh) scale(1.1) rotate(180deg);
    }

    100% {
        transform: translate(-5vw, -5vh) scale(0.9) rotate(360deg);
    }
}

@keyframes auraFloat {
    0% {
        transform: translate(-50%, -50%) scale(1);
    }

    100% {
        transform: translate(-40%, -60%) scale(1.2);
    }
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    padding: 0.75rem 2rem;
    border-bottom: 1px solid var(--border);
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    color: var(--accent);
    text-transform: uppercase;
    text-shadow: 0 0 10px var(--accent-glow);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-btn {
    padding: 0.5rem 0;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 2px solid transparent;
}

.nav-btn:hover,
.nav-btn.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}

main {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    padding: 1.5rem 2rem;
    position: relative;
    z-index: 10;
}

/* Landing Page Hero */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 1rem;
    min-height: 50vh;
}

.hero-title {
    font-size: 5.5rem;
    font-weight: 950;
    line-height: 0.9;
    letter-spacing: -0.06em;
    text-transform: uppercase;
    margin-bottom: 2rem;
    background: linear-gradient(135deg, #fff 0%, #aaa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: heroFadeIn 1s cubic-bezier(0.19, 1, 0.22, 1);
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--accent);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.6em;
    margin-bottom: 3rem;
    opacity: 0.8;
}

.landing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    width: 100%;
    margin-top: 4rem;
}

.landing-card {
    text-align: center;
    padding: 3rem 2rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    transition: all 0.4s cubic-bezier(0.19, 1, 0.22, 1);
    cursor: pointer;
}

.landing-card:hover {
    background: rgba(212, 255, 0, 0.05);
    border-color: var(--accent);
    transform: translateY(-10px);
}

.landing-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.landing-card p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.cta-group {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
}

@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }

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

@media (max-width: 900px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .landing-grid {
        grid-template-columns: 1fr;
    }
}

.hidden {
    display: none !important;
}

/* Auth Page */
.auth-container {
    max-width: 400px;
    margin: 10vh auto;
    padding: 3rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background-color: var(--bg-card);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.auth-container h2 {
    margin-bottom: 2rem;
    text-align: left;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: var(--accent);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.form-group input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 2px;
    background-color: #050505;
    color: white;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    transition: color 0.2s;
    user-select: none;
    z-index: 5;
}

.password-toggle:hover {
    color: var(--accent);
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    background-color: var(--accent);
    color: black;
    border: none;
    border-radius: 2px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.2s;
}

.btn-primary:hover {
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
}

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: var(--accent);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    background-color: #080808;
}

.card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background-color: var(--accent);
    transform: scaleY(0);
    transition: transform 0.3s;
}

.card:hover::after {
    transform: scaleY(1);
}

.progress-container {
    margin-top: 1.5rem;
}

.progress-bar-bg {
    height: 4px;
    background-color: #111;
    border-radius: 0;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    width: 0%;
    transition: width 1s ease-out;
}

.progress-text {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    margin-top: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Quiz UI */
.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.quiz-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
    width: 100%;
    margin-bottom: 1.5rem;
}

.side-nav-btn {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    color: var(--accent);
    cursor: pointer;
    font-size: 3rem;
    font-weight: 200;
    transition: all 0.3s cubic-bezier(0.19, 1, 0.22, 1);
    opacity: 0.4;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 120px;
    z-index: 1000;
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    backdrop-filter: blur(5px);
    border-radius: 4px;
}

.side-nav-btn.generate-mode {
    opacity: 0.8;
    color: var(--accent);
    animation: sidePulse 2s infinite;
}

@keyframes sidePulse {
    0% {
        box-shadow: 0 0 0 0 rgba(212, 255, 0, 0.4);
        transform: translateY(-50%) scale(1);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(212, 255, 0, 0);
        transform: translateY(-50%) scale(1.05);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(212, 255, 0, 0);
        transform: translateY(-50%) scale(1);
    }
}

.side-nav-btn:hover:not(:disabled) {
    opacity: 1;
    background: rgba(212, 255, 0, 0.1);
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.side-nav-btn.prev {
    left: 2rem;
}

.side-nav-btn.next {
    right: 2rem;
}

.side-nav-btn:disabled {
    color: #333;
    cursor: not-allowed;
    opacity: 0.1;
    border-color: transparent;
}

.side-nav-btn .arrow {
    font-family: var(--font-sans);
    line-height: 1;
}

#q-jump {
    appearance: none;
    -webkit-appearance: none;
    padding: 0.4rem 2rem 0.4rem 1rem !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23d4ff00' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    border-radius: 2px;
}

#q-jump option {
    background: #000;
    color: #fff;
    padding: 10px;
}

@media (max-width: 1400px) {
    .side-nav-btn.prev {
        left: 0.5rem;
    }

    .side-nav-btn.next {
        right: 0.5rem;
    }
}

@media (max-width: 1000px) {
    .side-nav-btn {
        width: 40px;
        height: 80px;
        font-size: 2rem;
    }
}

.mcq-card,
.practice-card {
    flex: 1;
    max-width: 900px;
    background-color: rgba(2, 2, 2, 0.4);
    backdrop-filter: blur(25px);
    border: 1px solid rgba(212, 255, 0, 0.05);
    border-radius: 4px;
    padding: 2rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8), inset 0 0 20px rgba(212, 255, 0, 0.02);
}


.question-text {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #fff;
    line-height: 1.4;
}

.options-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.option-btn {
    text-align: left;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--border);
    background-color: #050505;
    color: #888;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.option-btn:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
    background-color: rgba(212, 255, 0, 0.05);
}

.option-btn.correct {
    background-color: rgba(0, 255, 102, 0.1);
    border-color: var(--success);
    color: var(--success);
}

.option-btn.incorrect {
    background-color: rgba(255, 0, 51, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.explanation-box {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #080808;
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
}

.explanation-box h4 {
    margin-bottom: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

.code-editor {
    width: 100%;
    height: 300px;
    font-family: var(--font-mono);
    padding: 1.25rem;
    margin: 1.5rem 0;
    background-color: #000;
    color: var(--accent);
    border: 1px solid var(--border);
    border-radius: 2px;
    font-size: 0.85rem;
    outline: none;
    resize: vertical;
}

.code-editor::-webkit-scrollbar {
    width: 6px;
}

.code-editor::-webkit-scrollbar-track {
    background: #000;
}

.code-editor::-webkit-scrollbar-thumb {
    background: #1a1a1a;
    border-radius: 10px;
}

.code-editor::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

.feedback-box {
    padding: 1.5rem;
    border: 1px solid var(--border);
    margin-bottom: 2rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
}

.feedback-box.success {
    background-color: rgba(0, 255, 102, 0.1);
    color: var(--success);
    border-color: var(--success);
}

.feedback-box.revealed {
    border-left: 4px solid #555;
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
}

.feedback-box.danger {
    background-color: rgba(255, 0, 51, 0.1);
    color: var(--danger);
    border-color: var(--danger);
}

/* Leaderboard */
.leaderboard-container {
    max-width: 1000px;
    margin: 0 auto;
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
    font-family: var(--font-mono);
}

.leaderboard-table th {
    text-align: left;
    padding: 1.5rem 1rem;
    border-bottom: 2px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.leaderboard-table td {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

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

.rank-gold {
    color: #ccff00;
    text-shadow: 0 0 10px rgba(204, 255, 0, 0.5);
    font-weight: 800;
}

.rank-silver {
    color: #cccccc;
    font-weight: 700;
}

.rank-bronze {
    color: #aa8866;
    font-weight: 700;
}

/* Tabs */
.tabs-container {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: #080808;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.2s;
}

.tab-btn:hover,
.tab-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(212, 255, 0, 0.05);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: #333;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

/* Sigma Notify System */
#notification-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 11000;
    pointer-events: none;
}

.sigma-notify {
    min-width: 300px;
    max-width: 450px;
    padding: 1.25rem 1.5rem;
    background: rgba(5, 5, 5, 0.9);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    pointer-events: auto;
    animation: notifySlideIn 0.4s cubic-bezier(0.19, 1, 0.22, 1);
    transition: all 0.3s ease;
}

.sigma-notify.fade-out {
    opacity: 0;
    transform: translateX(50px) scale(0.95);
}

.sigma-notify.success {
    border-left-color: var(--success);
}

.sigma-notify.error {
    border-left-color: var(--danger);
}

.sigma-notify.warning {
    border-left-color: #ff9900;
}

@keyframes notifySlideIn {
    from {
        opacity: 0;
        transform: translateX(100px) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes pulseGlow {
    0% {
        box-shadow: 0 0 5px var(--accent);
    }

    50% {
        box-shadow: 0 0 20px var(--accent);
    }

    100% {
        box-shadow: 0 0 5px var(--accent);
    }
}

.pulse-glow {
    animation: pulseGlow 1.5s infinite ease-in-out;
    border-color: var(--accent) !important;
    background: rgba(0, 255, 170, 0.1) !important;
}

/* Pricing Section */
.pricing-container {
    max-width: 1100px;
    margin: 4rem auto;
    padding: 2rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    align-items: stretch;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    padding: 3rem;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.pricing-card:hover {
    border-color: var(--accent);
    transform: translateY(-10px);
    background: rgba(0, 255, 102, 0.03);
}

.pricing-card.premium {
    border: 2px solid var(--accent);
    background: rgba(0, 255, 102, 0.05);
}

.premium-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #000;
    font-size: 0.65rem;
    font-weight: 900;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    letter-spacing: 0.1em;
}

.plan-name {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.plan-price {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--accent);
    margin-bottom: 2rem;
}

.plan-price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.plan-features {
    list-style: none;
    margin-bottom: 3rem;
    padding: 0;
}

.plan-features li {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.plan-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 900;
}

.plan-features li.disabled {
    opacity: 0.3;
}

.plan-features li.disabled::before {
    content: "✕";
    color: var(--danger);
}

/* Feedback Enhancements */
#feedback-text {
    width: 100%;
    height: 15rem;
    font-family: var(--font-mono);
    padding: 1.5rem;
    background-color: #000;
    color: var(--accent);
    border: 1px solid var(--border);
    border-radius: 2px;
    font-size: 0.85rem;
    outline: none;
    resize: none;
    margin-bottom: 2rem;
}

#feedback-text:focus {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(0, 255, 102, 0.1);
}