/* ============================================
   ROGHOST - Modern Hosting Company Website
   Dark Theme with Gray & Green Accent Colors
   ============================================ */

:root {
    /* Color Palette */
    --primary-bg: #0a0e13;
    --secondary-bg: #0f1419;
    --card-bg: #161d25;
    --accent-green: #00d98a;
    --accent-green-dark: #00b872;
    --accent-green-darker: #009959;
    --accent-green-glow: rgba(0, 217, 138, 0.4);
    --text-primary: #e4e8ed;
    --text-secondary: #8a98a8;
    --text-muted: #5a6875;
    --border-color: #1f2830;
    --border-color-light: #2a3440;
    --hover-bg: #1d2530;
    --neon-glow: 0 0 15px rgba(0, 217, 138, 0.4), 0 0 30px rgba(0, 217, 138, 0.2);
    --neon-glow-strong: 0 0 20px rgba(0, 217, 138, 0.6), 0 0 40px rgba(0, 217, 138, 0.3), 0 0 60px rgba(0, 217, 138, 0.15);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.35rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 3.5rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* ============================================
   BASE STYLES
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--primary-bg);
    background-image: 
        radial-gradient(ellipse at 20% 10%, rgba(0, 217, 138, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 90%, rgba(0, 217, 138, 0.03) 0%, transparent 50%),
        linear-gradient(180deg, var(--primary-bg) 0%, #080c11 100%);
    color: var(--text-primary);
    font-size: 0.92rem;
    line-height: 1.55;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 19, 0.7);
    backdrop-filter: blur(30px) saturate(200%);
    border-bottom: 1px solid rgba(0, 217, 138, 0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

header.scrolled {
    background: rgba(10, 14, 19, 0.9);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.7), 0 0 60px rgba(0, 217, 138, 0.15);
    border-bottom-color: rgba(0, 217, 138, 0.2);
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent-green);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-shadow: 0 0 10px rgba(0, 217, 138, 0.3);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.logo:hover {
    transform: translateY(-1px);
    text-shadow: 0 0 15px rgba(0, 217, 138, 0.5);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.4));
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-green);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-green);
    background: rgba(0, 217, 138, 0.05);
}

.nav-links a:hover::after {
    width: 80%;
}

.cta-button {
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
    color: var(--primary-bg);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 217, 138, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.cta-button:hover::before {
    left: 100%;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 217, 138, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

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

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--accent-green);
    border-radius: 3px;
    transition: var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 75vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1400px;
    width: 100%;
    text-align: center;
    z-index: 10;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
    color: var(--text-primary);
}

.hero h1 .highlight {
    color: var(--text-primary);
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes subtleGlow {
    0%, 100% {
        filter: drop-shadow(0 0 8px rgba(0, 217, 138, 0.3));
    }
    50% {
        filter: drop-shadow(0 0 12px rgba(0, 217, 138, 0.5));
    }
}

.hero p {
    font-size: clamp(0.88rem, 1.5vw, 1rem);
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.6;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.7rem 1.8rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-dark) 50%, var(--accent-green) 100%);
    background-size: 200% 200%;
    color: var(--primary-bg);
    box-shadow: 0 8px 32px rgba(0, 217, 138, 0.4), inset 0 2px 0 rgba(255, 255, 255, 0.2), 0 0 40px rgba(0, 217, 138, 0.2);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.15);
    animation: gradientSlide 3s ease infinite;
    font-weight: 700;
}

@keyframes gradientSlide {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.7s ease;
}

.btn-primary:hover::after {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 217, 138, 0.5), inset 0 2px 0 rgba(255, 255, 255, 0.25), 0 0 50px rgba(0, 217, 138, 0.3);
    border-color: rgba(255, 255, 255, 0.25);
    animation: none;
    background-position: 50% 50%;
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(22, 29, 37, 0.6) 0%, rgba(15, 20, 25, 0.7) 100%);
    backdrop-filter: blur(10px);
    color: var(--accent-green);
    border: 2px solid var(--accent-green);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 2px 0 rgba(0, 217, 138, 0.2), 0 0 30px rgba(0, 217, 138, 0.1);
    position: relative;
    overflow: hidden;
    font-weight: 600;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 138, 0.05), rgba(0, 217, 138, 0.1));
    opacity: 0;
    transition: opacity 0.3s;
}

.btn-secondary:hover {
    border-color: var(--accent-green);
    background: linear-gradient(135deg, rgba(0, 217, 138, 0.15) 0%, rgba(0, 185, 114, 0.2) 100%);
    box-shadow: 0 10px 40px rgba(0, 217, 138, 0.35), inset 0 2px 0 rgba(0, 217, 138, 0.25), 0 0 50px rgba(0, 217, 138, 0.25);
    transform: translateY(-3px);
}

.btn-secondary:hover::before {
    opacity: 1;
}

/* Animated Background */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.hero-bg-circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 217, 138, 0.2) 0%, rgba(0, 217, 138, 0.1) 40%, transparent 70%);
    animation: float 25s infinite ease-in-out, pulse 8s infinite ease-in-out;
    filter: blur(100px);
    opacity: 0.7;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.1); }
}

.hero-bg-circle:nth-child(1) {
    width: 500px;
    height: 500px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.hero-bg-circle:nth-child(2) {
    width: 400px;
    height: 400px;
    top: 60%;
    right: 15%;
    animation-delay: 8s;
}

.hero-bg-circle:nth-child(3) {
    width: 600px;
    height: 600px;
    bottom: -10%;
    left: 50%;
    animation-delay: 16s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--secondary-bg);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-header h2 {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    margin-bottom: var(--spacing-xs);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: linear-gradient(135deg, rgba(22, 29, 37, 0.8) 0%, rgba(15, 20, 25, 0.6) 100%);
    backdrop-filter: blur(10px);
    padding: 1.2rem 1.4rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-color-light);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-color-light);
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(0, 217, 138, 0.1);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(22, 29, 37, 0.9) 100%);
}

.feature-icon {
    width: 46px;
    height: 46px;
    background: linear-gradient(135deg, rgba(138, 152, 168, 0.1), rgba(138, 152, 168, 0.05));
    border: 1px solid var(--border-color-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-xs);
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover .feature-icon {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 217, 138, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    background: linear-gradient(135deg, rgba(0, 217, 138, 0.12), rgba(0, 217, 138, 0.06));
    border-color: rgba(0, 217, 138, 0.25);
}

.feature-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background: var(--primary-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-md) var(--spacing-md);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h4 {
    color: var(--accent-green);
    margin-bottom: var(--spacing-xs);
    font-size: 1rem;
}

.footer-section p,
.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    color: var(--accent-green);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.82rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--secondary-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition-normal);
        pointer-events: none;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .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 {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s infinite;
}

/* ============================================
   TESTIMONIALS / REVIEWS SECTION
   ============================================ */

.testimonial-card {
    background: linear-gradient(135deg, rgba(22, 29, 37, 0.7) 0%, rgba(15, 20, 25, 0.5) 100%);
    backdrop-filter: blur(15px);
    padding: 1.1rem 1.3rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 217, 138, 0.15);
    position: relative;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.testimonial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 138, 0.03) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.testimonial-card:hover::before {
    opacity: 1;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 217, 138, 0.3);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 217, 138, 0.15);
    background: linear-gradient(135deg, rgba(22, 29, 37, 0.85) 0%, rgba(15, 20, 25, 0.65) 100%);
}

.testimonial-card-hidden:hover {
    transform: translateY(-6px);
    border-color: var(--border-color-light);
    box-shadow: 0 12px 40px rgba(0, 217, 138, 0.2), var(--shadow-lg);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(0, 217, 138, 0.02) 100%);
}

.verified-badge {
    position: absolute;
    top: -12px;
    left: 20px;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
    color: var(--primary-bg);
    padding: 0.4rem 1.2rem;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(0, 217, 138, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    z-index: 10;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stars {
    display: flex;
    gap: 0.2rem;
    margin: var(--spacing-xs) 0;
    font-size: 1.05rem;
}

.stars span {
    color: var(--accent-green);
    text-shadow: 0 0 6px rgba(0, 217, 138, 0.3);
    transition: all 0.2s;
    display: inline-block;
}

.testimonial-card:hover .stars span {
    animation: starBounce 0.5s ease;
}

.testimonial-card:hover .stars span:nth-child(1) { animation-delay: 0s; }
.testimonial-card:hover .stars span:nth-child(2) { animation-delay: 0.05s; }
.testimonial-card:hover .stars span:nth-child(3) { animation-delay: 0.1s; }
.testimonial-card:hover .stars span:nth-child(4) { animation-delay: 0.15s; }
.testimonial-card:hover .stars span:nth-child(5) { animation-delay: 0.2s; }

@keyframes starBounce {
    0%, 100% {
        transform: scale(1) translateY(0);
    }
    50% {
        transform: scale(1.1) translateY(-2px);
        text-shadow: 0 0 8px rgba(0, 217, 138, 0.5);
    }
}

.testimonial-text {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.84rem;
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
    position: relative;
    padding-left: 1rem;
}

.testimonial-text::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -8px;
    font-size: 2.5rem;
    color: var(--accent-green);
    opacity: 0.2;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-text strong {
    color: var(--accent-green);
    font-weight: 600;
    text-shadow: 0 0 4px rgba(0, 217, 138, 0.15);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-sm);
    transition: border-color 0.3s;
}

.testimonial-card:hover .testimonial-author {
    border-color: rgba(0, 217, 138, 0.3);
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-green-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--primary-bg);
    box-shadow: 0 4px 12px rgba(0, 217, 138, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.testimonial-card:hover .avatar {
    transform: scale(1.05);
    box-shadow: 0 5px 16px rgba(0, 217, 138, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.15);
}

.author-info {
    flex: 1;
}

.author-info strong {
    color: var(--text-primary);
    font-size: 0.88rem;
    display: block;
    margin-bottom: 0.1rem;
}

.author-info span {
    color: var(--text-secondary);
    font-size: 0.78rem;
}

/* Responsive Grid für Testimonials */
@media (max-width: 1200px) {
    #testimonials .container > div:first-of-type {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

@media (max-width: 768px) {
    #testimonials .container > div:first-of-type {
        grid-template-columns: 1fr !important;
    }
}

/* ============================================
   CONTACT FORM
   ============================================ */

.contact-form {
    background: linear-gradient(135deg, rgba(22, 29, 37, 0.85) 0%, rgba(15, 20, 25, 0.7) 100%);
    backdrop-filter: blur(15px);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color-light);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.35rem;
    font-size: 0.85rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    background: rgba(22, 29, 37, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-green);
    background: rgba(22, 29, 37, 0.9);
    box-shadow: 0 0 0 3px rgba(0, 217, 138, 0.08), 0 4px 12px rgba(0, 0, 0, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

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

.contact-form button[type="submit"] {
    margin-top: var(--spacing-sm);
}

/* ============================================
   COMPREHENSIVE MOBILE RESPONSIVE
   ============================================ */

/* Tablet (≤980px) */
@media (max-width: 980px) {
    .features-grid,
    .tech-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
        min-height: auto;
        padding-top: calc(var(--spacing-xl) + 2rem);
    }

    .hero-bg-circle { display: none; }

    .section-header h2 {
        font-size: clamp(1.5rem, 4vw, 2.2rem);
    }

    .feature-card {
        padding: 1.5rem;
    }
}

/* Phone (≤640px) */
@media (max-width: 640px) {
    :root {
        --spacing-md: 1.25rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 3.5rem;
    }

    .features-grid,
    .tech-grid {
        grid-template-columns: 1fr !important;
    }

    .hero {
        padding: 3rem 1rem;
        min-height: auto;
    }

    .hero h1 {
        font-size: clamp(1.8rem, 8vw, 2.5rem);
    }

    .hero p {
        font-size: 0.95rem;
    }

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

    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }

    .features,
    .tech-stack,
    .testimonials,
    .cta-section,
    .contact,
    .faq-section {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }

    /* Stats section */
    .stats {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }

    .stats .container > div {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 1.25rem !important;
    }

    .stats .container > div > div > div:first-child {
        font-size: 2rem !important;
    }

    /* Testimonials */
    #testimonials-grid {
        grid-template-columns: 1fr !important;
    }

    .testimonial-card {
        padding: 1.25rem;
    }

    /* Contact form */
    .contact-form {
        padding: 1.25rem;
    }

    .contact-form div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }

    /* FAQ */
    .faq-item summary {
        font-size: 0.95rem !important;
        padding: 1rem 1.1rem !important;
    }

    .faq-item > div {
        padding: 0 1.1rem 1rem !important;
        font-size: 0.9rem !important;
    }

    /* CTA section */
    .cta-section h2 {
        font-size: clamp(1.4rem, 5vw, 2rem) !important;
    }

    .cta-section .btn-primary {
        font-size: 1rem !important;
        padding: 1rem 2rem !important;
    }

    /* Feature cards lists on mobile */
    .feature-card ul {
        font-size: 0.88rem !important;
    }

    .feature-card ul li {
        line-height: 1.8 !important;
    }

    /* Beta banner */
    .beta-banner {
        font-size: 0.78rem;
        padding: 0.5rem 0.75rem;
    }

    .beta-badge {
        font-size: 0.65rem;
    }
}

/* Small phone (≤400px) */
@media (max-width: 400px) {
    .hero h1 {
        font-size: 1.6rem;
    }

    .stats .container > div {
        grid-template-columns: 1fr !important;
    }

    .section-header h2 {
        font-size: 1.3rem;
    }

    .section-header p {
        font-size: 0.9rem;
    }
}