/* ========================================
   Yiva Ekspertiz - Modern Corporate Website
   Logo Colors: Red (#D32F2F) & Dark Gray (#333333)
   ======================================== */

/* ========== CSS Variables ========== */
:root {
    /* Logo-based Primary Colors */
    --primary-color: #D32F2F;
    --primary-dark: #B71C1C;
    --primary-light: #EF5350;
    
    /* Secondary Colors */
    --secondary-color: #333333;
    --secondary-dark: #1a1a1a;
    --secondary-light: #555555;
    
    /* Accent Colors */
    --accent-color: #FFC107;
    --success-color: #4CAF50;
    --info-color: #2196F3;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --medium-gray: #E0E0E0;
    --dark-gray: #424242;
    --text-color: #212121;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #D32F2F 0%, #B71C1C 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(211, 47, 47, 0.9) 0%, rgba(51, 51, 51, 0.9) 100%);
    
    /* Spacing */
    --section-padding: 80px 0;
    --container-max-width: 1200px;
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ========== Container ========== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== Section Headers ========== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--secondary-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ========== Header & Navigation ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

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

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-menu a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary-color);
    padding: 8px 0;
    position: relative;
}

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

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

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.btn-panel {
    background: var(--gradient-primary);
    color: var(--white) !important;
    padding: 10px 24px !important;
    border-radius: var(--radius-md);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.btn-panel::after {
    display: none;
}

.btn-panel:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--secondary-color);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* ========== Hero Section ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-overlay);
    margin-top: 80px;
    padding: 60px 20px;
    text-align: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="1200" height="600" fill="url(%23grid)"/></svg>');
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--white);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 15px;
    color: var(--accent-color);
}

.hero-description {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

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

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

/* ========== Animations ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.animate-fade-in-delay {
    animation: fadeIn 0.8s ease 0.3s forwards;
    opacity: 0;
}

.animate-fade-in-delay-2 {
    animation: fadeIn 0.8s ease 0.6s forwards;
    opacity: 0;
}

.animate-fade-in-delay-3 {
    animation: fadeIn 0.8s ease 0.9s forwards;
    opacity: 0;
}

/* ========== About Section ========== */
.about {
    padding: var(--section-padding);
    background-color: var(--white);
}

.about-text {
    max-width: 900px;
    margin: 0 auto;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.about-text h4 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin: 30px 0 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-color);
}

.founder {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.services-list {
    list-style: none;
    margin-top: 20px;
}

.services-list li {
    font-size: 1.1rem;
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-color);
}

.services-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* ========== Why Us Section ========== */
.why-us {
    padding: var(--section-padding);
    background-color: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 2rem;
    color: var(--white);
}

.feature-card h3 {
    font-size: 1.4rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 1rem;
    color: var(--secondary-light);
    line-height: 1.7;
}

/* ========== Mission Vision Section ========== */
.mission-vision {
    padding: var(--section-padding);
    background: var(--gradient-overlay);
    color: var(--white);
}

.mv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.mv-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-base);
}

.mv-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.mv-icon {
    width: 70px;
    height: 70px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.mv-icon i {
    font-size: 2rem;
    color: var(--primary-color);
}

.mv-card h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--white);
}

.mv-card p {
    font-size: 1.05rem;
    line-height: 1.8;
    opacity: 0.95;
}

/* ========== Services Section ========== */
.services {
    padding: var(--section-padding);
    background-color: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--light-gray);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

.service-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 90px;
    height: 90px;
    background: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    box-shadow: var(--shadow-sm);
}

.service-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.service-card h3 {
    font-size: 1.4rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.service-card p {
    font-size: 1rem;
    color: var(--secondary-light);
    line-height: 1.7;
}

/* ========== Expertise Section ========== */
.expertise {
    padding: var(--section-padding);
    background-color: var(--light-gray);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.expertise-card {
    background: var(--white);
    padding: 35px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.expertise-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.expertise-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.expertise-card li {
    font-size: 1rem;
    padding: 10px 0;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-color);
    border-bottom: 1px solid var(--medium-gray);
}

.expertise-card li:last-child {
    border-bottom: none;
}

.expertise-card i {
    color: var(--primary-color);
    margin-top: 4px;
}

.expertise-footer {
    text-align: center;
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.expertise-footer p {
    font-size: 1.2rem;
    color: var(--secondary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.expertise-footer i {
    color: var(--accent-color);
    font-size: 1.5rem;
}

/* ========== Quality Section ========== */
.quality {
    padding: var(--section-padding);
    background-color: var(--white);
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.quality-card {
    background: var(--light-gray);
    padding: 35px 25px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-base);
    border: 2px solid transparent;
}

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

.quality-icon {
    width: 75px;
    height: 75px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.quality-icon i {
    font-size: 1.8rem;
    color: var(--white);
}

.quality-card h3 {
    font-size: 1.3rem;
    color: var(--secondary-color);
    margin-bottom: 12px;
}

.quality-card p {
    font-size: 1rem;
    color: var(--secondary-light);
    line-height: 1.7;
}

.quality-footer {
    text-align: center;
    background: var(--light-gray);
    padding: 30px;
    border-radius: var(--radius-lg);
}

.quality-footer p {
    font-size: 1.15rem;
    color: var(--secondary-color);
    line-height: 1.8;
}

/* ========== Contact Section ========== */
.contact {
    padding: var(--section-padding);
    background-color: var(--light-gray);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
}

.contact-info {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-info h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.founder-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--medium-gray);
}

.contact-item:last-of-type {
    border-bottom: none;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    min-width: 30px;
}

.contact-item strong {
    display: block;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.contact-item a {
    color: var(--primary-color);
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.whatsapp-cta {
    margin-top: 30px;
    text-align: center;
}

.btn-whatsapp {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: #25D366;
    color: var(--white);
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.btn-whatsapp:hover {
    background: #1EBE57;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-whatsapp i {
    font-size: 1.5rem;
}

.whatsapp-note {
    margin-top: 15px;
    font-size: 0.95rem;
    color: var(--secondary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.contact-map {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* ========== Footer ========== */
.footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-slogan {
    font-size: 1.2rem;
    font-weight: 600;
    opacity: 0.95;
    color: var(--accent-color);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links a {
    opacity: 0.9;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 12px;
    opacity: 0.9;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-panel-link {
    color: var(--accent-color);
    font-weight: 600;
    transition: var(--transition-fast);
}

.footer-panel-link:hover {
    color: var(--white);
}

/* ========== Scroll to Top Button ========== */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ========== Floating WhatsApp Button ========== */
.floating-whatsapp {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #25D366;
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
    z-index: 1000;
    transition: var(--transition-base);
    animation: whatsapp-pulse 2s infinite;
}

.floating-whatsapp:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.7);
}

.floating-whatsapp .whatsapp-tooltip {
    position: absolute;
    right: 75px;
    background: var(--secondary-color);
    color: var(--white);
    padding: 10px 15px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
}

.floating-whatsapp .whatsapp-tooltip::after {
    content: '';
    position: absolute;
    right: -8px;
    top: 50%;
    transform: translateY(-50%);
    border-left: 8px solid var(--secondary-color);
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
}

.floating-whatsapp:hover .whatsapp-tooltip {
    opacity: 1;
    visibility: visible;
    right: 80px;
}

@keyframes whatsapp-pulse {
    0% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
    }
    50% {
        box-shadow: 0 4px 30px rgba(37, 211, 102, 0.8);
    }
    100% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
    }
}

/* ========== Responsive Design ========== */
@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 80px);
        background-color: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: 30px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition-base);
        gap: 20px;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.4rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .mv-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }
    
    .logo img {
        height: 40px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .hero {
        margin-top: 70px;
        min-height: 90vh;
    }
    
    .hero-logo {
        max-width: 280px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .features-grid,
    .services-grid,
    .quality-grid {
        grid-template-columns: 1fr;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo img {
        margin: 0 auto 15px;
    }
    
    .footer-contact p {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .feature-card,
    .service-card,
    .quality-card {
        padding: 30px 20px;
    }
    
    .floating-whatsapp {
        bottom: 80px;
        right: 20px;
        width: 55px;
        height: 55px;
        font-size: 1.8rem;
    }
    
    .floating-whatsapp .whatsapp-tooltip {
        display: none;
    }
    
    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }
}