/* R&F Power Solutions Landing Page 
   Design System & Foundation
*/

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Open+Sans:wght@400;500;600;700&display=swap');

:root {
    /* Color Palette - Premium Electric Blue */
    --color-primary: #0284C7; /* Sky 600 */
    --color-primary-hover: #0369A1; /* Sky 700 */
    --color-primary-light: #E0F2FE; /* Sky 100 */
    
    --color-bg: #FAFAFA; /* Zinc 50 */
    --color-bg-secondary: #FFFFFF;
    --color-surface: #FFFFFF;
    
    --color-text-headline: #18181B; /* Zinc 900 */
    --color-text-body: #52525B; /* Zinc 600 */
    --color-gray-100: #F4F4F5; /* Zinc 100 */
    --color-gray-200: #E4E4E7; /* Zinc 200 */
    --color-gray-400: #A1A1AA; /* Zinc 400 */
    --color-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #38BDF8 0%, #0284C7 100%);
    --gradient-overlay: linear-gradient(to right, rgba(24, 24, 27, 0.95) 0%, rgba(24, 24, 27, 0.3) 100%);
    --gradient-card: linear-gradient(180deg, #FFFFFF 0%, #FAFAFA 100%);

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    /* Spacing & Borders */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    
    --transition-fast: 0.2s ease-in-out;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Modern Shadows */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 25px 50px -12px rgba(2, 132, 199, 0.15);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-body);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography Utility */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-headline);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* Container */
.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 1.5rem;
    max-width: 1216px;
}

/* Layout Utilities */
.section-padding {
    padding: 6rem 0;
}

@media (min-width: 768px) {
    .section-padding {
        padding: 8rem 0;
    }
}

/* Components Helpers */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-card {
    background: var(--gradient-card);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
    padding: 2.5rem;
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

/* Grid helper */
.grid {
    display: grid;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 767px) {
    .grid { grid-template-columns: 1fr; }
    .hidden-mobile { display: none !important; }
}

.gap-8 { gap: 2rem; }
.gap-12 { gap: 3rem; }
.gap-16 { gap: 4rem; }

/* Flex helpers */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.text-center { text-align: center; }

/* Buttons & CTAs */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    border: none;
    font-family: var(--font-heading);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: 0 10px 20px -5px rgba(2, 132, 199, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 25px -5px rgba(2, 132, 199, 0.5);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary-light);
}

.btn-secondary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

/* Badge Headers */
.badge-header {
    display: inline-block;
    color: var(--color-white);
    background: var(--color-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 1.25rem 0;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-headline);
    padding: 0.5rem;
    z-index: 101;
}

.menu-toggle svg line {
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

@media (max-width: 768px) {
    .menu-toggle { display: block; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        border-bottom: 2px solid var(--color-primary);
        box-shadow: var(--shadow-md);
        padding: 0;
    }
    
    .nav-links.active { display: flex; }
    
    .nav-links a {
        padding: 1.5rem;
        border-bottom: 1px solid var(--color-gray-100);
        width: 100%;
        text-align: center;
        font-size: 1.1rem;
    }
    
    .header-cta { display: none !important; }

    .menu-toggle.active .line-mid { opacity: 0; }
    .menu-toggle.active .line-top { transform: translateY(6px) rotate(45deg); transform-origin: 12px 6px; }
    .menu-toggle.active .line-bottom { transform: translateY(-6px) rotate(-45deg); transform-origin: 12px 18px; }
}

.nav-links a {
    color: var(--color-text-headline);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    font-family: var(--font-heading);
}

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

/* Split Hero Section */
.hero-split {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
    background: var(--color-bg);
}

.hero-text-content {
    max-width: 600px;
}

.hero-split h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--color-text-headline);
}

@media (min-width: 1024px) {
    .hero-split h1 { font-size: 4rem; }
}

.hero-split p {
    font-size: 1.125rem;
    color: var(--color-text-body);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: perspective(1000px) rotateY(-5deg);
    transition: var(--transition-smooth);
}

.hero-image-wrapper:hover {
    transform: perspective(1000px) rotateY(0deg) translateY(-10px);
}

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

/* Generic Hero Alternative */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-overlay);
    z-index: 1;
}

@media (max-width: 768px) {
    .hero-overlay {
        background: linear-gradient(to bottom, rgba(24, 24, 27, 0.95) 0%, rgba(24, 24, 27, 0.5) 100%);
    }
}
.hero .container {
    position: relative;
    z-index: 2;
    padding-top: 8rem;
}

/* Stats Bar */
.trust-bar {
    background: var(--color-bg-secondary);
    padding: 3rem 0;
    border-top: 1px solid var(--color-gray-200);
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: 0.85rem;
    color: var(--color-text-headline);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
}

/* Services */
.services-section {
    background-color: var(--color-bg);
}

.service-card {
    background: var(--color-white);
    padding: 3rem 2rem;
    text-align: center;
    border: none;
}

.service-card .icon {
    width: 4.5rem;
    height: 4.5rem;
    background: var(--color-primary-light);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin: 0 auto 2rem auto;
    transition: var(--transition-smooth);
}

.service-card:hover .icon {
    background: var(--color-primary);
    color: var(--color-white);
    transform: rotate(10deg);
}

.service-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.service-card ul {
    list-style: none;
    margin-top: 1.5rem;
    text-align: left;
}

.service-card ul li {
    font-size: 0.95rem;
    color: var(--color-text-body);
    margin-bottom: 0.85rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.service-card ul li::before {
    content: "✓";
    color: var(--color-primary);
    font-weight: 800;
}

/* Portfolio Gallery */
.portfolio-card {
    width: 350px;
    height: 260px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-md);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(2, 132, 199, 0.9) 0%, rgba(2, 132, 199, 0) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    padding: 2rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.portfolio-card:hover .portfolio-img {
    transform: scale(1.1);
}

.portfolio-card:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h4 {
    color: var(--color-white);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

.portfolio-overlay p {
    color: var(--color-primary-light);
    transform: translateY(20px);
    transition: transform 0.4s ease 0.1s;
}

.portfolio-card:hover .portfolio-overlay h4,
.portfolio-card:hover .portfolio-overlay p {
    transform: translateY(0);
}

/* Reviews Continuous Marquee */
.marquee-wrapper {
    overflow: hidden;
    padding: 3rem 0;
    background: var(--color-primary-light);
    border-radius: var(--radius-lg);
    margin-top: 2rem;
}

.marquee-content {
    display: flex;
    gap: 2rem;
    width: max-content;
    animation: scroll 40s linear infinite;
    padding: 1rem;
}

.marquee-content:hover {
    animation-play-state: paused;
}

.review-card {
    background: var(--color-white);
    border: none;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    width: 400px;
    box-shadow: var(--shadow-md);
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-50% - 1rem)); }
}

/* Floating Call CTA */
.floating-call {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--color-primary);
    color: #FFFFFF;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    z-index: 999;
    transition: var(--transition-smooth);
}
.floating-call span {
    display: none;
}
.floating-call svg {
    width: 1.5rem;
    height: 1.5rem;
}
.floating-call:hover {
    transform: scale(1.1);
    background: var(--color-primary-hover);
}
.floating-call .sonar {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: var(--color-primary);
    border-radius: inherit;
    z-index: -1;
    transform: translate(-50%, -50%);
    animation: sonar 2s ease-out infinite;
}
@keyframes sonar {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.8; }
    100% { transform: translate(-50%, -50%) scale(2); opacity: 0; }
}

/* General Input Utilities */
input, textarea {
    font-family: var(--font-body);
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary) !important;
    box-shadow: 0 0 0 3px var(--color-primary-light);
}