/* === Custom Properties (CSS Variables) === */
:root {
    /* Colors */
    --bg-dark: #0a0a0f;
    --bg-card: rgba(20, 20, 30, 0.6);
    --primary: #4f46e5;
    --primary-glow: rgba(79, 70, 229, 0.5);
    --secondary: #ec4899;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

ul {
    list-style: none;
}

/* === Utility Classes === */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 500;
    font-family: var(--font-heading);
    cursor: pointer;
    border: none;
    transition: var(--transition-smooth);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #6366f1);
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

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

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

.btn.small {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.full-width {
    width: 100%;
}

/* === Animations === */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-in-delayed {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
}

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

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

/* === Navigation === */
.glass-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-smooth);
}

.glass-nav.scrolled {
    padding: 10px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 20px 60px;
    position: relative;
}

.hero-content {
    flex: 1;
    z-index: 10;
}

.hero h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-graphics {
    flex: 1;
    position: relative;
    height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
}

.orb-1 {
    width: 300px;
    height: 300px;
    background: var(--primary);
    top: 10%;
    right: 20%;
    opacity: 0.3;
}

.orb-2 {
    width: 250px;
    height: 250px;
    background: var(--secondary);
    bottom: 10%;
    left: 10%;
    opacity: 0.2;
}

.mockup-card {
    width: 350px;
    height: 250px;
    padding: 20px;
    position: relative;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
    transform-style: preserve-3d;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.mockup-header {
    display: flex;
    gap: 6px;
    margin-bottom: 20px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.skeleton-line {
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    margin-bottom: 15px;
}

.skeleton-line.title {
    width: 60%;
    height: 20px;
    margin-bottom: 25px;
}

.skeleton-line.short {
    width: 80%;
}

.skeleton-btn {
    width: 100px;
    height: 30px;
    background: rgba(79, 70, 229, 0.3);
    border-radius: 15px;
    margin-top: 25px;
}

/* === Services Section === */
.services {
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.section-header p {
    color: var(--text-muted);
}

.tabs-container {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.tab-buttons {
    display: flex;
    border-bottom: 1px solid var(--glass-border);
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
}

.tab-buttons::-webkit-scrollbar {
    display: none; /* Chrome */
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 20px;
    color: var(--text-muted);
    font-family: var(--font-heading);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    white-space: nowrap;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-main);
}

.tab-btn.active {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

.tab-content-area {
    padding: 40px;
}

.tab-panel {
    display: none;
    animation: fadeInTab 0.4s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fadeInTab {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-layout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.panel-text {
    flex: 1;
}

.panel-text h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.panel-text p {
    color: var(--text-muted);
    margin-bottom: 25px;
}

.panel-text ul {
    margin-bottom: 30px;
}

.panel-text li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-text li i {
    color: var(--primary);
}

.panel-icon {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.panel-icon i {
    font-size: 150px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    opacity: 0.8;
}

/* === Contact Section === */
.contact {
    padding: 100px 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-container {
    display: flex;
    gap: 40px;
    padding: 50px;
}

.contact-info {
    flex: 1;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.contact-details p {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.contact-details i {
    color: var(--primary);
}

.contact-form {
    flex: 1;
}

.input-group {
    position: relative;
    margin-bottom: 25px;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 15px;
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.input-group select {
    appearance: none;
    cursor: pointer;
}

.input-group select option {
    background: var(--bg-dark);
    color: var(--text-main);
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(79, 70, 229, 0.2);
}

.input-group label {
    position: absolute;
    left: 15px;
    top: 15px;
    color: var(--text-muted);
    transition: var(--transition-fast);
    pointer-events: none;
}

.input-group input:focus ~ label,
.input-group input:not(:placeholder-shown) ~ label,
.input-group textarea:focus ~ label,
.input-group textarea:not(:placeholder-shown) ~ label {
    top: -10px;
    left: 10px;
    font-size: 0.8rem;
    background: var(--bg-dark);
    padding: 0 5px;
    color: var(--primary);
    border-radius: 4px;
}

/* === Footer === */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 60px 20px 20px;
    background: rgba(5, 5, 8, 0.8);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 15px;
    max-width: 250px;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: var(--text-muted);
}

.footer-links ul li a:hover {
    color: var(--primary);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* === WhatsApp Float === */
.whatsapp-float {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #fff;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 35px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 100;
    transition: var(--transition-fast);
}

.whatsapp-float:hover {
    background-color: #1ebe5d;
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

/* === Responsive Design === */
@media (max-width: 992px) {
    .contact-container {
        flex-direction: column;
        padding: 30px;
    }
    
    .panel-layout {
        flex-direction: column;
        text-align: center;
    }
    
    .panel-text ul {
        display: inline-block;
        text-align: left;
    }
    
    .panel-icon {
        margin-top: 20px;
    }
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 150px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-graphics {
        height: 300px;
        margin-top: 40px;
    }
    
    .nav-links {
        display: none; /* In a real app, toggle this via JS */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px;
        text-align: center;
        border-bottom: 1px solid var(--glass-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .whatsapp-float {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 30px;
    }
    
    .tab-btn {
        padding: 15px 10px;
        font-size: 0.9rem;
    }
}