/* assets/css/style.css */

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #00b09b 0%, #96c93d 100%);
    --warning-gradient: linear-gradient(135deg, #f7971e 0%, #ffd200 100%);
    --danger-gradient: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
    --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    --cyber-gradient: linear-gradient(135deg, #00f5ff 0%, #7b68ee 100%);
    --neon-green: #39ff14;
    --neon-blue: #00d4ff;
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --dark-bg: #0a0a0a;
    --card-bg: rgba(20, 20, 20, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-accent: #00d4ff;
    --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.3);
    --shadow-soft: 0 10px 40px rgba(0, 0, 0, 0.3);
    --border-radius: 20px;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Hiệu ứng nền Pulse */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(123, 104, 238, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(57, 255, 20, 0.05) 0%, transparent 50%);
    z-index: -2;
    animation: bgPulse 8s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    0% { opacity: 0.8; }
    100% { opacity: 1; }
}

/* Các hạt Particle */
.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--neon-blue);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(120deg); }
    66% { transform: translateY(20px) rotate(240deg); }
}

/* Header */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--cyber-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--neon-blue);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-blue);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    padding: 140px 0 100px 0;
    text-align: center;
    position: relative;
    background: transparent;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--neon-green);
    margin-bottom: 2rem;
    animation: slideDown 1s ease 0.2s both;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--neon-blue) 0%, #ffffff 50%, var(--neon-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
    letter-spacing: -0.02em;
    animation: slideUp 1s ease 0.4s both;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.4rem);
    color: var(--text-secondary);
    margin: 0 auto 2.5rem auto;
    max-width: 700px;
    line-height: 1.6;
    animation: slideUp 1s ease 0.6s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    animation: slideUp 1s ease 0.8s both;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--cyber-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Buttons */
.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUp 1s ease 1s both;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: var(--cyber-gradient);
    color: #000;
    font-weight: 700;
    font-size: 1.1rem;
    padding: 18px 36px;
    border-radius: var(--border-radius);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 0 50px rgba(0, 212, 255, 0.6);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    padding: 18px 36px;
    border: 2px solid var(--glass-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
}

.btn-secondary:hover {
    border-color: var(--neon-blue);
    color: var(--neon-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* Features */
.features {
    padding: 100px 0;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
    background: var(--cyber-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 2.5rem 2rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-icon {
    font-size: 3.5rem;
    background: var(--cyber-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1.5rem;
    display: block;
}

/* Process Section */
.process {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(123, 104, 238, 0.05) 100%);
}

.process-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.process-steps {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 3rem 2.5rem;
}

.step {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background: rgba(0, 212, 255, 0.05);
    border-radius: 15px;
    border-left: 4px solid var(--neon-blue);
    transition: all 0.3s ease;
}

.step-number {
    background: var(--cyber-gradient);
    color: #000;
    font-weight: 800;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

/* Trading Chart Visual */
.trading-chart {
    width: 100%;
    max-width: 500px;
    height: 350px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

.chart-line {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    height: 200px;
    background: linear-gradient(45deg, var(--neon-green) 0%, var(--neon-blue) 100%);
    clip-path: polygon(0% 80%, 15% 60%, 30% 70%, 45% 40%, 60% 50%, 75% 20%, 90% 30%, 100% 10%, 100% 100%, 0% 100%);
}

.footer {
    background: var(--dark-gradient);
    padding: 3rem 0 1rem 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

/* Animations */
@keyframes slideDown { from { opacity: 0; transform: translateY(-30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(50px); } to { opacity: 1; transform: translateY(0); } }

/* Media Queries */
@media (max-width: 1024px) {
    .process-container {
        grid-template-columns: repeat(1, 1fr);
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .hero-stats { flex-direction: column; gap: 1.5rem; }
    .features-grid { grid-template-columns: repeat(1, 1fr); }
    .step { flex-direction: column; align-items: center; text-align: center; }
    .step-number { margin-right: 0; margin-bottom: 1rem; }
}