/* ============================================
   21Factors - Bitcoin Investment Landing Page
   Color Scheme: Obsidian Black & Brilliant Gold
   ============================================ */

/* CSS Variables */
:root {
    --obsidian-black: #0a0a0b;
    --obsidian-darker: #050506;
    --obsidian-lighter: #1a1a1c;
    --brilliant-gold: #FFD700;
    --gold-hover: #FFC700;
    --gold-dim: #B8860B;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --border-color: #2a2a2c;
    --success-green: #00ff88;
    --error-red: #ff3333;
    --gradient-gold: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background: var(--obsidian-black);
    color: var(--text-primary);
    line-height: 1.6;
    position: relative;
}

/* Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 11, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    animation: slideDown 0.5s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
}

.brand-icon {
    color: var(--brilliant-gold);
    font-size: 1.8rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.brand-text {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brilliant-gold);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--brilliant-gold);
}

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

.nav-social {
    display: flex;
    gap: 1rem;
}

.social-link {
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    padding: 0.5rem;
}

.social-link:hover {
    color: var(--brilliant-gold);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem 2rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    z-index: 2;
    position: relative;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Bitcoin Animation */
.hero-animation {
    margin-bottom: 2rem;
    position: relative;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bitcoin-symbol {
    font-size: 5rem;
    color: var(--brilliant-gold);
    font-weight: 700;
    position: relative;
    z-index: 2;
    animation: float 3s ease-in-out infinite;
    text-shadow: 0 0 30px rgba(255, 215, 0, 0.5);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(5deg);
    }
}

.bitcoin-glow {
    position: absolute;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(255, 215, 0, 0.3) 0%, transparent 70%);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

/* Hero Typography */
.hero-title {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.title-line {
    display: block;
}

.title-line.accent {
    background: var(--gradient-gold);
    -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;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Subscription Form */
.subscription-container {
    margin-bottom: 3rem;
}

.subscription-form {
    max-width: 500px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    gap: 0;
    margin-bottom: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    overflow: hidden;
    transition: all 0.3s ease;
    background: var(--obsidian-darker);
}

.form-group:focus-within {
    border-color: var(--brilliant-gold);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
}

.email-input {
    flex: 1;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-primary);
}

.email-input::placeholder {
    color: var(--text-muted);
}

.submit-btn {
    padding: 1rem 2rem;
    background: var(--brilliant-gold);
    color: var(--obsidian-black);
    border: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    font-family: var(--font-primary);
}

.submit-btn:hover {
    background: var(--gold-hover);
    transform: translateX(2px);
}

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

.btn-icon {
    transition: transform 0.3s ease;
}

.submit-btn:hover .btn-icon {
    transform: translateX(4px);
}

.form-message {
    min-height: 24px;
    margin-top: 0.5rem;
    font-size: 0.9rem;
    text-align: center;
    transition: all 0.3s ease;
}

.form-message.success {
    color: var(--success-green);
}

.form-message.error {
    color: var(--error-red);
}

.form-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.form-hint i {
    color: var(--gold-dim);
}

/* Features Preview */
.features-preview {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    background: var(--obsidian-lighter);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: default;
}

.feature:hover {
    border-color: var(--brilliant-gold);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.1);
}

.feature i {
    color: var(--brilliant-gold);
    font-size: 1.2rem;
}

.feature span {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

/* Background Decoration */
.bg-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 215, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 215, 0, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
}

.glow-1 {
    width: 400px;
    height: 400px;
    background: var(--brilliant-gold);
    top: -200px;
    right: -200px;
    animation: orb-float 15s ease-in-out infinite;
}

.glow-2 {
    width: 300px;
    height: 300px;
    background: var(--gold-dim);
    bottom: -150px;
    left: -150px;
    animation: orb-float 20s ease-in-out infinite reverse;
}

@keyframes orb-float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-30px, 30px) scale(0.9);
    }
}

/* Loading State */
.loading {
    pointer-events: none;
    opacity: 0.6;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--obsidian-black);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero {
        padding: 5rem 1rem 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .form-group {
        flex-direction: column;
        border-radius: 12px;
    }
    
    .submit-btn {
        width: 100%;
        justify-content: center;
        padding: 1.25rem;
    }
    
    .features-preview {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .feature {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.25rem;
    }
    
    .brand-icon {
        font-size: 1.5rem;
    }
    
    .nav-social {
        gap: 0.5rem;
    }
    
    .social-link {
        font-size: 1rem;
    }
    
    .bitcoin-symbol {
        font-size: 3.5rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .bg-decoration {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}