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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --border-color: #334155;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity 0.3s;
}

.logo a:hover {
    opacity: 0.8;
}

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

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--primary-color);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 101;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

/* Rate Card */
.rate-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    margin: 2rem auto;
    max-width: 500px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.rate-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(99, 102, 241, 0.2);
}

.rate-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.rate-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.rate-update {
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

.rate-value {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.rate-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.rate-currency {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.rate-change {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.change-value.positive {
    color: var(--accent-green);
}

.change-value.negative {
    color: var(--accent-red);
}

.change-percent.positive {
    color: var(--accent-green);
}

.change-percent.negative {
    color: var(--accent-red);
}

.refresh-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
    width: 100%;
}

.refresh-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.refresh-btn:active {
    transform: scale(0.98);
}

/* Hero Register Button */
.hero-register {
    margin-top: 2.5rem;
    text-align: center;
}

.hero-register-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-decoration: none;
    padding: 1.25rem 3rem;
    border-radius: 15px;
    font-size: 1.25rem;
    font-weight: 700;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.hero-register-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

.hero-register-btn:active {
    transform: translateY(-1px) scale(1.02);
}

.hero-register-note {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Benefits */
.benefits-list {
    max-width: 900px;
    margin: 0 auto;
}

.benefit-item {
    display: flex;
    gap: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.benefit-item:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

.benefit-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.benefit-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.benefit-content p {
    color: var(--text-secondary);
}

/* Registration */
.registration {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    text-align: center;
    padding: 5rem 0;
}

.registration-content {
    max-width: 600px;
    margin: 0 auto;
}

.registration .section-title {
    color: white;
    -webkit-text-fill-color: white;
    margin-bottom: 1rem;
}

.registration-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.register-btn {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    text-decoration: none;
    padding: 1.25rem 3rem;
    border-radius: 15px;
    font-size: 1.25rem;
    font-weight: 700;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.register-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.register-btn:active {
    transform: translateY(-1px) scale(1.02);
}

.registration-note {
    margin-top: 1rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-card);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        gap: 0;
        padding: 5rem 2rem 2rem;
        transition: right 0.3s ease;
        z-index: 100;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.3);
    }

    .nav.active {
        right: 0;
    }

    .nav a {
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
        font-size: 1.1rem;
        width: 100%;
    }

    .nav a:last-child {
        border-bottom: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .rate-amount {
        font-size: 2rem;
    }

    .hero-register-btn {
        padding: 1rem 2rem;
        font-size: 1.1rem;
    }

    .hero-register-note {
        font-size: 0.85rem;
    }

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

    .benefit-item {
        flex-direction: column;
        text-align: center;
    }

    .register-btn {
        padding: 1rem 2rem;
        font-size: 1.1rem;
    }
}

/* How to Trade Section */
.how-to-trade {
    padding: 5rem 0;
}

.how-to-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.trading-steps {
    max-width: 1000px;
    margin: 0 auto 4rem;
}

.trading-step {
    display: flex;
    gap: 2rem;
    margin-bottom: 4rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.trading-step:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.step-image {
    margin-top: 1.5rem;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.step-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s;
}

.step-image:hover img {
    transform: scale(1.02);
}

.trading-tips {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
    max-width: 900px;
    margin: 0 auto 3rem;
}

.trading-tips h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    text-align: center;
}

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

.tips-list li {
    padding: 1rem 0;
    padding-left: 2rem;
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.tips-list li:last-child {
    border-bottom: none;
}

.tips-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: bold;
    font-size: 1.2rem;
}

.trading-cta {
    text-align: center;
}

/* Quiz Section */
.quiz {
    padding: 5rem 0;
    background: rgba(15, 23, 42, 0.5);
}

.quiz-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.quiz-container {
    max-width: 800px;
    margin: 0 auto;
}

.quiz-start {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
}

.quiz-info {
    margin-bottom: 2rem;
}

.quiz-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.quiz-info p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.quiz-start-btn,
.quiz-next-btn,
.quiz-restart-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.quiz-start-btn:hover,
.quiz-next-btn:hover,
.quiz-restart-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.quiz-start-btn:active,
.quiz-next-btn:active,
.quiz-restart-btn:active {
    transform: scale(0.98);
}

.quiz-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem;
}

.quiz-progress {
    margin-bottom: 2rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.question-container {
    margin-bottom: 2rem;
}

.question-text {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.answer-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.answer-option {
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
    font-size: 1rem;
    color: var(--text-primary);
}

.answer-option:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    transform: translateX(5px);
}

.answer-option.selected {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.2);
}

.answer-option.correct {
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.2);
}

.answer-option.incorrect {
    border-color: var(--accent-red);
    background: rgba(239, 68, 68, 0.2);
}

.answer-option:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}

.quiz-result {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
}

.result-content h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.result-score {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.score-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.score-total {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.result-message {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.result-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.quiz-register-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-decoration: none;
    padding: 1rem 2.5rem;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
    display: inline-block;
}

.quiz-register-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

@media (max-width: 768px) {
    .trading-step {
        flex-direction: column;
        gap: 1.5rem;
        padding: 2rem 1.5rem;
    }

    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .trading-tips {
        padding: 2rem 1.5rem;
    }

    .tips-list li {
        padding-left: 1.5rem;
    }

    .result-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .quiz-register-btn,
    .quiz-restart-btn {
        width: 100%;
    }

    .quiz-start,
    .quiz-content,
    .quiz-result {
        padding: 2rem 1.5rem;
    }

    .question-text {
        font-size: 1.1rem;
    }

    .answer-option {
        padding: 0.875rem 1.25rem;
        font-size: 0.95rem;
    }
}