/* ================================
   DeepMine AI - Futuristic Theme
   Brand Colors:
   - Primary Blue: #2979FF
   - Aqua Glow: #33F0FF
   - Violet Gradient: #7B61FF
   - Deep Navy Background: #0B0F1E
   - Galaxy Purple: #9E4DFF
   - Soft Cyan Highlight: #52E5E7
   ================================ */

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

:root {
    --primary-blue: #2979FF;
    --aqua-glow: #33F0FF;
    --violet-gradient: #7B61FF;
    --deep-navy: #0B0F1E;
    --galaxy-purple: #9E4DFF;
    --soft-cyan: #52E5E7;
    --white: #ffffff;
    --light-gray: #E0E7FF;
    --dark-gray: #1A1F35;
    --card-bg: rgba(26, 31, 53, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.05);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--deep-navy);
    color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ================================
   Navigation
   ================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(11, 15, 30, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(41, 121, 255, 0.2);
    padding: 16px 0;
}

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

.logo-container .logo {
    height: 90px;
    width: auto;
    transition: transform 0.3s ease;
    mix-blend-mode: screen;
}

.logo-container .logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--light-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--aqua-glow));
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--aqua-glow);
}

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

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--white);
    font-size: 24px;
    cursor: pointer;
}

/* ================================
   Hero Section
   ================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100vw;
    height: 100vh;
    transform: translate(-50%, -50%);
    object-fit: cover;
    pointer-events: none;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(11, 15, 30, 0.85) 0%,
        rgba(11, 15, 30, 0.7) 50%,
        rgba(11, 15, 30, 0.85) 100%
    );
    z-index: 1;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(158, 77, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(41, 121, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(51, 240, 255, 0.08) 0%, transparent 50%);
    animation: particleFloat 20s ease-in-out infinite;
    z-index: 2;
    pointer-events: none;
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 10;
    width: 100%;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient), var(--aqua-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--light-gray);
    margin-bottom: 40px;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient));
    color: var(--white);
    box-shadow: 0 8px 24px rgba(41, 121, 255, 0.3);
}

.cta-button.primary:hover {
    box-shadow: 0 12px 32px rgba(51, 240, 255, 0.5);
    transform: translateY(-2px);
}

.cta-button.secondary {
    background: transparent;
    color: var(--aqua-glow);
    border: 2px solid var(--primary-blue);
}

.cta-button.secondary:hover {
    background: var(--glass-bg);
    border-color: var(--aqua-glow);
}

.code-badge {
    background: var(--glass-bg);
    padding: 4px 12px;
    border-radius: 6px;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    color: var(--aqua-glow);
    border: 1px solid var(--soft-cyan);
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--light-gray);
}

.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.floating-card {
    position: absolute;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.3);
    border-radius: 16px;
    padding: 24px 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    animation: float 6s ease-in-out infinite;
    z-index: 10;
}

.floating-card i {
    font-size: 32px;
    color: var(--aqua-glow);
}

.floating-card span {
    font-weight: 600;
}

.floating-card:nth-child(1) {
    top: 10%;
    left: 10%;
}

.floating-card:nth-child(2) {
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.floating-card:nth-child(3) {
    bottom: 10%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ================================
   Section Styles
   ================================ */

.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--light-gray);
}

/* ================================
   About Section
   ================================ */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text .lead {
    font-size: 20px;
    color: var(--aqua-glow);
    margin-bottom: 24px;
    font-weight: 500;
}

.about-text p {
    color: var(--light-gray);
    margin-bottom: 24px;
    line-height: 1.8;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-item i {
    color: var(--aqua-glow);
    font-size: 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    border-color: var(--aqua-glow);
    box-shadow: 0 8px 32px rgba(51, 240, 255, 0.2);
    transform: translateY(-4px);
}

.stat-card i {
    font-size: 40px;
    color: var(--primary-blue);
    margin-bottom: 16px;
}

.stat-card h3 {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.stat-card p {
    color: var(--light-gray);
    font-size: 14px;
}

/* ================================
   How It Works Section
   ================================ */

.how-it-works-section {
    background: linear-gradient(180deg, transparent 0%, rgba(41, 121, 255, 0.05) 50%, transparent 100%);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 80px;
}

.step-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
}

.step-card:hover {
    border-color: var(--aqua-glow);
    box-shadow: 0 12px 40px rgba(51, 240, 255, 0.2);
    transform: translateY(-8px);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient));
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    box-shadow: 0 4px 16px rgba(41, 121, 255, 0.4);
}

.step-icon {
    font-size: 48px;
    color: var(--aqua-glow);
    margin: 24px 0;
}

.step-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--white);
}

.step-card p {
    color: var(--light-gray);
    line-height: 1.6;
}

/* ================================
   Calculator Section
   ================================ */

.calculator-section {
    margin-top: 60px;
}

.calculator-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.calculator-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 20px;
    padding: 48px;
    max-width: 800px;
    margin: 0 auto;
}

.calculator-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--light-gray);
    font-size: 14px;
    font-weight: 500;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(41, 121, 255, 0.3);
    border-radius: 8px;
    color: var(--white);
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--aqua-glow);
    box-shadow: 0 0 0 3px rgba(51, 240, 255, 0.1);
}

.calculator-results {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(41, 121, 255, 0.1);
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    color: var(--light-gray);
    font-size: 16px;
}

.result-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
}

.result-value.primary {
    color: var(--primary-blue);
}

/* ================================
   AI Section
   ================================ */

.ai-section {
    background: radial-gradient(circle at center, rgba(123, 97, 255, 0.1) 0%, transparent 70%);
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.ai-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(123, 97, 255, 0.2);
    border-radius: 20px;
    padding: 40px;
    transition: all 0.3s ease;
}

.ai-card:hover {
    border-color: var(--violet-gradient);
    box-shadow: 0 12px 40px rgba(123, 97, 255, 0.3);
    transform: translateY(-4px);
}

.ai-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--violet-gradient), var(--galaxy-purple));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 8px 24px rgba(123, 97, 255, 0.3);
}

.ai-icon i {
    font-size: 36px;
    color: var(--white);
}

.ai-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--white);
}

.ai-card p {
    color: var(--light-gray);
    line-height: 1.8;
}

/* ================================
   Mining Models Section
   ================================ */

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.model-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 20px;
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.model-card.featured {
    border-color: var(--violet-gradient);
    box-shadow: 0 12px 40px rgba(123, 97, 255, 0.3);
}

.model-card:hover {
    border-color: var(--aqua-glow);
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(51, 240, 255, 0.2);
}

.model-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient));
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.model-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: 0 8px 24px rgba(41, 121, 255, 0.3);
}

.model-icon i {
    font-size: 36px;
    color: var(--white);
}

.model-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
}

.model-card > p {
    color: var(--light-gray);
    font-size: 14px;
    margin-bottom: 24px;
    line-height: 1.6;
}

.model-features {
    list-style: none;
    text-align: left;
    margin-bottom: 24px;
    flex-grow: 1;
}

.model-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    color: var(--light-gray);
    font-size: 13px;
}

.model-features i {
    color: var(--aqua-glow);
    font-size: 14px;
}

.model-pricing {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: auto;
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.model-pricing .price {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    margin-bottom: 8px;
    line-height: 1;
}

.model-pricing .duration {
    font-size: 14px;
    color: var(--light-gray);
    font-weight: 500;
    display: block;
}

/* ================================
   Referral Section
   ================================ */

.referral-section {
    background: linear-gradient(180deg, transparent 0%, rgba(158, 77, 255, 0.05) 50%, transparent 100%);
}

.referral-hero {
    text-align: center;
    margin-bottom: 48px;
}

.referral-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--violet-gradient), var(--galaxy-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: 0 12px 40px rgba(158, 77, 255, 0.4);
}

.referral-icon i {
    font-size: 48px;
    color: var(--white);
}

.referral-hero h3 {
    font-size: 36px;
    margin-bottom: 16px;
}

.referral-hero p {
    font-size: 18px;
    color: var(--light-gray);
}

.code-highlight {
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient));
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 700;
    font-family: 'Courier New', monospace;
}

.referral-rewards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.reward-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(158, 77, 255, 0.2);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    transition: all 0.3s ease;
}

.reward-card:hover {
    border-color: var(--galaxy-purple);
    box-shadow: 0 12px 40px rgba(158, 77, 255, 0.3);
    transform: translateY(-4px);
}

.reward-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--violet-gradient), var(--galaxy-purple));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.reward-icon i {
    font-size: 36px;
    color: var(--white);
}

.reward-card h4 {
    font-size: 20px;
    margin-bottom: 16px;
}

.reward-amount {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--aqua-glow), var(--soft-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 16px;
}

.reward-card p {
    color: var(--light-gray);
    line-height: 1.6;
}

.referral-calculator {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 20px;
    padding: 40px;
    max-width: 600px;
    margin: 0 auto 48px;
}

.referral-calculator h4 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 32px;
}

.ref-calc-inputs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.ref-input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--light-gray);
    font-size: 14px;
}

.ref-input-group input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(41, 121, 255, 0.3);
    border-radius: 8px;
    color: var(--white);
    font-size: 16px;
    font-family: inherit;
}

.ref-calc-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(41, 121, 255, 0.2);
}

.ref-calc-result span:first-child {
    font-size: 18px;
    color: var(--light-gray);
}

.ref-total {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.daily-checkin-box {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 2px solid var(--primary-blue);
    border-radius: 20px;
    padding: 32px 40px;
    margin: 48px auto 48px;
    max-width: 800px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: 0 8px 32px rgba(41, 121, 255, 0.3);
    transition: all 0.3s ease;
}

.daily-checkin-box:hover {
    border-color: var(--aqua-glow);
    box-shadow: 0 12px 40px rgba(51, 240, 255, 0.4);
    transform: translateY(-4px);
}

.checkin-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue), var(--aqua-glow));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 8px 24px rgba(41, 121, 255, 0.4);
}

.checkin-icon i {
    font-size: 36px;
    color: var(--white);
}

.checkin-content h4 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--white);
}

.checkin-content p {
    font-size: 16px;
    color: var(--light-gray);
    line-height: 1.6;
    margin: 0;
}

.bonus-highlight {
    color: var(--aqua-glow);
    font-weight: 700;
    font-size: 18px;
}

.referral-steps {
    max-width: 800px;
    margin: 0 auto;
}

.referral-steps h4 {
    text-align: center;
    font-size: 24px;
    margin-bottom: 32px;
}

.ref-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.ref-step {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 12px;
    padding: 24px 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.ref-step:hover {
    border-color: var(--aqua-glow);
    transform: translateY(-4px);
}

.ref-step-num {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.ref-step span:last-child {
    font-size: 14px;
    color: var(--light-gray);
}

/* ================================
   Security Section
   ================================ */

.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.security-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 20px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.security-card:hover {
    border-color: var(--soft-cyan);
    box-shadow: 0 12px 40px rgba(82, 229, 231, 0.2);
    transform: translateY(-4px);
}

.security-card i {
    font-size: 48px;
    color: var(--aqua-glow);
    margin-bottom: 24px;
}

.security-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
}

.security-card p {
    color: var(--light-gray);
    line-height: 1.6;
}

/* ================================
   Contact Section
   ================================ */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    border-color: var(--aqua-glow);
    transform: translateY(-4px);
}

.contact-card i {
    font-size: 36px;
    color: var(--primary-blue);
    margin-bottom: 16px;
}

.contact-card h4 {
    font-size: 18px;
    margin-bottom: 12px;
}

.contact-card a {
    color: var(--aqua-glow);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-card a:hover {
    color: var(--soft-cyan);
}

.contact-form {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 20px;
    padding: 48px;
}

.contact-form h3 {
    font-size: 28px;
    margin-bottom: 32px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(41, 121, 255, 0.3);
    border-radius: 8px;
    color: var(--white);
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--aqua-glow);
    box-shadow: 0 0 0 3px rgba(51, 240, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ================================
   Footer
   ================================ */

.footer {
    background: var(--dark-gray);
    border-top: 1px solid rgba(41, 121, 255, 0.2);
    padding: 24px 0 12px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 32px;
    margin-bottom: 16px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand .logo-container .logo {
    height: 50px;
    width: auto;
}

.footer-brand p {
    color: var(--light-gray);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.footer-column h4 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--white);
}

.footer-column a {
    display: block;
    color: var(--light-gray);
    text-decoration: none;
    margin-bottom: 8px;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--aqua-glow);
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 36px;
    height: 36px;
    background: var(--glass-bg);
    border: 1px solid rgba(41, 121, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 14px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--violet-gradient));
    color: var(--white);
    border-color: transparent;
    transform: translateY(-4px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--light-gray);
    font-size: 13px;
}

.invitation-code {
    font-weight: 600;
}

.invitation-code span {
    color: var(--aqua-glow);
    font-family: 'Courier New', monospace;
}

/* ================================
   Floating CTA
   ================================ */

.floating-cta {
    position: fixed;
    bottom: 32px;
    right: 32px;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.floating-cta.visible {
    opacity: 1;
    transform: translateY(0);
}

.floating-cta .cta-button {
    box-shadow: 0 8px 32px rgba(41, 121, 255, 0.4);
}

/* ================================
   Responsive Design
   ================================ */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ai-grid {
        grid-template-columns: 1fr;
    }
    
    .models-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-video {
        width: 100vw;
        height: 56.25vw; /* 16:9 aspect ratio */
        min-height: 100vh;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .steps-container,
    .models-grid,
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .calculator-inputs {
        grid-template-columns: 1fr;
    }
    
    .referral-rewards {
        grid-template-columns: 1fr;
    }
    
    .ref-calc-inputs {
        grid-template-columns: 1fr;
    }
    
    .ref-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .daily-checkin-box {
        flex-direction: column;
        text-align: center;
        padding: 32px 24px;
    }
    
    .checkin-content h4 {
        font-size: 20px;
    }
    
    .checkin-content p {
        font-size: 15px;
    }
}
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .floating-cta {
        bottom: 16px;
        right: 16px;
        left: 16px;
    }
    
    .floating-cta .cta-button {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .calculator-card,
    .contact-form,
    .referral-calculator {
        padding: 24px;
    }
    
    .stat-card,
    .step-card,
    .ai-card,
    .model-card,
    .reward-card,
    .security-card {
        padding: 24px;
    }
}

/* ================================
   Animations
   ================================ */

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(51, 240, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(51, 240, 255, 0.6);
    }
}

.cta-button.primary:hover {
    animation: glow 2s infinite;
}