/* Global Styles & Variables */
:root {
    --bg-primary: #08080a;
    --bg-secondary: #121216;
    --bg-tertiary: #191921;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Brand Accent Colors */
    --accent-gold-start: #f3d078;
    --accent-gold-end: #c59b27;
    --accent-silver-start: #f1f5f9;
    --accent-silver-end: #94a3b8;
    
    --border-glow: rgba(243, 208, 120, 0.15);
    --border-light: rgba(255, 255, 255, 0.08);
    
    /* Font Families */
    --font-heading: 'Syne', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
}

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

.grid {
    display: grid;
    gap: 32px;
}

/* Typography & Accent Text */
h1, h2, h3 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

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

.accent-gold {
    background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.accent-silver {
    background: linear-gradient(135deg, var(--accent-silver-start), var(--accent-silver-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
    color: #0d0d11;
    border: none;
    box-shadow: 0 4px 20px rgba(243, 208, 120, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(243, 208, 120, 0.35);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: rgba(8, 8, 10, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-symbol {
    font-size: 1.8rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
}

.logo-text span {
    color: var(--accent-gold-start);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.nav-btn {
    padding: 10px 20px;
    font-size: 0.85rem;
}

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 64px;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.tagline-badge {
    background: rgba(243, 208, 120, 0.08);
    border: 1px solid rgba(243, 208, 120, 0.2);
    color: var(--accent-gold-start);
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-title {
    font-size: 4.2rem;
    line-height: 1.05;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.15rem;
    margin-bottom: 40px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-visual {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-light);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
    background: var(--bg-secondary);
}

.hero-img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.animate-glow::after {
    content: '';
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 30px rgba(243, 208, 120, 0.05);
    pointer-events: none;
}

/* Section Common Headers */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    color: var(--accent-gold-start);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    display: block;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.8rem;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Comparison Section */
.comparison {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-top: 1px solid var(--border-light);
}

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

.card {
    border-radius: 16px;
    padding: 48px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid var(--border-light);
}

.card:hover {
    transform: translateY(-4px);
}

.card-dark {
    background: rgba(255, 255, 255, 0.02);
}

.card-gold {
    background: rgba(243, 208, 120, 0.02);
    border-color: rgba(243, 208, 120, 0.15);
}

.card-gold:hover {
    border-color: rgba(243, 208, 120, 0.3);
    box-shadow: 0 8px 30px rgba(243, 208, 120, 0.04);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    font-size: 0.9rem;
    font-weight: bold;
}

.error-icon {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.success-icon {
    background: rgba(243, 208, 120, 0.15);
    color: var(--accent-gold-start);
}

.card h3 {
    font-size: 1.5rem;
}

.card-list {
    list-style: none;
}

.card-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.card-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--text-muted);
}

.card-gold .card-list li::before {
    color: var(--accent-gold-start);
}

/* Feature Grid Section */
.solution {
    padding: 100px 0;
    border-top: 1px solid var(--border-light);
}

.features-grid {
    grid-template-columns: repeat(3, 1fr);
}

.feature-item {
    padding: 40px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-light);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.feature-item:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.03);
}

.feature-num {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 24px;
    opacity: 0.6;
}

.feature-title {
    font-size: 1.35rem;
    margin-bottom: 16px;
}

/* Calculator Section */
.calculator-sec {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    border-top: 1px solid var(--border-light);
}

.calculator-container {
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-light);
    border-radius: 24px;
    padding: 64px;
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.4);
}

.calc-header {
    text-align: center;
    margin-bottom: 48px;
}

.calc-header h2 {
    font-size: 2.5rem;
    margin-top: 8px;
    margin-bottom: 12px;
}

.calc-header p {
    max-width: 500px;
    margin: 0 auto;
}

.calc-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: center;
}

.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.label-row label {
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

.input-value {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--accent-gold-start);
}

/* Styled Slider Input */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    margin-bottom: 8px;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-gold-start), var(--accent-gold-end));
    cursor: pointer;
    box-shadow: 0 0 10px rgba(243, 208, 120, 0.4);
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.range-limits {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.calc-outputs {
    background: rgba(243, 208, 120, 0.02);
    border: 1px solid rgba(243, 208, 120, 0.1);
    border-radius: 16px;
    padding: 40px;
}

.output-card {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.output-item {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 16px;
}

.output-item:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}

.output-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.output-value {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
}

.calc-cta {
    width: 100%;
    margin-top: 16px;
}

/* Footer */
.footer {
    padding: 48px 0;
    border-top: 1px solid var(--border-light);
    background: var(--bg-primary);
}

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

.copyright {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .calc-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .header-container {
        justify-content: center;
        flex-direction: column;
        gap: 16px;
    }
    
    .header {
        height: 120px;
    }
    
    .hero {
        padding-top: 180px;
    }
    
    .nav {
        gap: 16px;
    }
    
    .nav-btn {
        display: none;
    }
    
    .calculator-container {
        padding: 32px;
    }
    
    .calc-outputs {
        padding: 24px;
    }
    
    .output-value {
        font-size: 1.8rem;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}