/* ============================================
   Cenvaris Research - Yellow Theme
   Professional Service Website
   ============================================ */

/* CSS Variables */
:root {
    --color-primary: #FFC107;
    --color-primary-dark: #FF8F00;
    --color-primary-light: #FFD54F;
    --color-primary-lighter: #FFF8E1;
    --color-accent: #FFB300;
    --color-accent-dark: #FF6F00;
    --color-text: #1a1a1a;
    --color-text-secondary: #5a5a5a;
    --color-text-light: #8a8a8a;
    --color-heading: #111111;
    --color-bg: #ffffff;
    --color-bg-alt: #FFFDE7;
    --color-bg-gray: #f8f8f8;
    --color-bg-dark: #1a1a1a;
    --color-border: #e8e8e8;
    --color-border-light: #f0f0f0;
    --color-white: #ffffff;
    --color-success: #4CAF50;

    --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;

    --header-height: 72px;
    --container-max: 1200px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-yellow: 0 4px 20px rgba(255, 143, 0, 0.25);
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Announcement Bar
   ============================================ */
.announcement-bar {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent-dark));
    color: #fff;
    text-align: center;
    padding: 10px 0;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* ============================================
   Header
   ============================================ */
.site-header {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: 20px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.header-logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.header-logo a:hover { color: var(--color-primary-dark); }

.main-nav { flex: 1; display: flex; justify-content: center; }

.nav-list { display: flex; gap: 36px; }

.nav-list li a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 5px 0;
}

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

.nav-list li a:hover { color: var(--color-primary-dark); }
.nav-list li a:hover::after { width: 100%; }

.header-cta a { display: inline-flex; }

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    font-family: var(--font-body);
}

.btn-sm { padding: 10px 22px; font-size: 0.85rem; }
.btn-full { width: 100%; }

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-yellow);
}

.btn-outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    position: relative;
    min-height: 620px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 143, 0, 0.75) 0%, rgba(255, 193, 7, 0.5) 40%, rgba(0, 0, 0, 0.4) 100%);
}

.hero-content { position: relative; z-index: 2; width: 100%; }

.hero-text { max-width: 620px; animation: fadeInUp 1s ease; }

.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.8rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 20px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 32px;
    line-height: 1.7;
    max-width: 540px;
}

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

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Stats Bar
   ============================================ */
.stats-bar {
    background: var(--color-bg-dark);
    padding: 40px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item { color: #fff; }

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.88rem;
    color: #aaa;
    letter-spacing: 0.5px;
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    background: var(--color-primary-lighter);
    color: var(--color-primary-dark);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 5px 16px;
    border-radius: 50px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.2;
    margin-bottom: 14px;
}

.section-title-left {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.2;
    margin-bottom: 18px;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Services Section
   ============================================ */
.services-section {
    padding: 90px 0;
    background: #fff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.service-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
}

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

.service-img-wrapper {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.service-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.service-card:hover .service-img-wrapper img { transform: scale(1.06); }

.service-content {
    padding: 28px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.service-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: var(--color-primary-lighter);
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    margin-top: -50px;
    position: relative;
    z-index: 1;
    border: 3px solid #fff;
    box-shadow: var(--shadow-sm);
}

.service-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 18px;
    flex: 1;
    line-height: 1.7;
}

.service-price {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--color-border-light);
}

.service-price strong {
    font-size: 1.3rem;
    color: var(--color-primary-dark);
    font-weight: 700;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-primary-dark);
    transition: var(--transition);
}

.service-link svg { transition: var(--transition); }

.service-link:hover { gap: 12px; }

/* ============================================
   About Section
   ============================================ */
.about-section {
    padding: 90px 0;
    background: var(--color-bg-alt);
}

.about-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-img {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.about-img img {
    width: 100%;
    height: auto;
    transition: transform 0.5s ease;
}

.about-img:hover img { transform: scale(1.03); }

.about-img-badge {
    position: absolute;
    bottom: 24px;
    right: 24px;
    background: var(--color-primary);
    color: var(--color-text);
    padding: 18px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.badge-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.badge-text {
    font-size: 0.78rem;
    font-weight: 500;
}

.about-content .section-tag { margin-bottom: 14px; }

.about-quote {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-primary-dark);
    margin-bottom: 20px;
    padding-left: 20px;
    border-left: 3px solid var(--color-primary);
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: 18px;
    line-height: 1.8;
}

/* ============================================
   Why Choose Us Section
   ============================================ */
.why-us-section {
    padding: 90px 0;
    background: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.feature-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius-lg);
    background: var(--color-bg-alt);
    transition: var(--transition);
}

.feature-card:hover {
    background: #fff;
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--color-primary-dark);
    color: #fff;
    transform: scale(1.1);
}

.feature-card h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   Process Section
   ============================================ */
.process-section {
    padding: 90px 0;
    background: var(--color-bg-gray);
}

.process-grid {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 240px;
    max-width: 320px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

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

.step-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 16px;
    opacity: 0.5;
}

.process-step h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 12px;
}

.process-step p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.process-arrow {
    display: flex;
    align-items: center;
    color: var(--color-primary);
    opacity: 0.4;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    padding: 90px 0;
    background: #fff;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-tag { margin-bottom: 14px; }
.contact-intro {
    color: var(--color-text-secondary);
    margin-bottom: 36px;
    font-size: 1rem;
}

.contact-details { display: flex; flex-direction: column; gap: 24px; }

.contact-item { display: flex; gap: 16px; align-items: flex-start; }

.contact-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--color-primary-lighter);
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h5 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 4px;
}

.contact-item p { font-size: 0.9rem; color: var(--color-text-secondary); }
.contact-item a:hover { color: var(--color-primary-dark); }

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.contact-form h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--color-heading);
    margin-bottom: 24px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-group { margin-bottom: 18px; }

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: var(--font-body);
    color: var(--color-text);
    background: #fff;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 193, 7, 0.15);
}

.form-group textarea { resize: vertical; }

.form-note {
    text-align: center;
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-top: 14px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background: #1a1a1a;
    color: #b0b0b0;
    padding-top: 64px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2.5fr 1fr 1fr 2fr;
    gap: 40px;
    padding-bottom: 50px;
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
    color: #999;
}

.footer-heading {
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-heading::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--color-primary);
}

.footer-menu li { margin-bottom: 10px; }
.footer-menu li a {
    font-size: 0.9rem;
    color: #999;
    transition: var(--transition);
}
.footer-menu li a:hover { color: var(--color-primary); padding-left: 5px; }

.footer-socials { display: flex; gap: 10px; }

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #b0b0b0;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--color-primary);
    color: var(--color-text);
    transform: translateY(-3px);
}

.newsletter-text { margin-bottom: 14px; font-size: 0.88rem; color: #999; }

.newsletter-form { display: flex; gap: 8px; margin-bottom: 8px; }

.newsletter-form input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    outline: none;
    font-family: var(--font-body);
}

.newsletter-form input::placeholder { color: #666; }
.newsletter-form input:focus { border-color: var(--color-primary); }

.newsletter-response { font-size: 0.82rem; color: var(--color-primary); min-height: 18px; }

.footer-bottom-bar {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom-bar p { font-size: 0.85rem; color: #777; }

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 998;
}

.back-to-top.active { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-3px); }

/* ============================================
   Toast
   ============================================ */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: #fff;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    z-index: 3000;
    opacity: 0;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
}

.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast svg { color: var(--color-primary); }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-title { font-size: 2.8rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
    .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }
    .main-nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        justify-content: flex-start;
        padding: 80px 30px 30px;
        z-index: 1000;
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
    }
    .main-nav.active { left: 0; }
    .nav-list { flex-direction: column; gap: 20px; }
    .nav-list li a { font-size: 1.1rem; }
    .header-cta { display: none; }

    .hero-section { min-height: 500px; }
    .hero-title { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1rem; }

    .section-title, .section-title-left { font-size: 1.8rem; }

    .about-wrapper { grid-template-columns: 1fr; gap: 30px; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }

    .process-arrow { display: none; }
    .process-step { max-width: 100%; }

    .form-row { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 30px; }

    .contact-form-wrapper { padding: 28px 20px; }

    .back-to-top { bottom: 20px; right: 20px; }

    .services-section, .about-section, .why-us-section, .process-section, .contact-section {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .services-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .hero-title { font-size: 1.8rem; }
    .hero-buttons { flex-direction: column; }
    .hero-buttons .btn { width: 100%; }
    .container { padding: 0 16px; }
    .stat-number { font-size: 2.2rem; }
}