/* ==========================================================================
   Aurevalen Inc — Corporate Website Styles
   Design based on Photofolio template (mobanwang #23184)
   ========================================================================== */

:root {
    --color-primary: #3f5e56;
    --color-primary-light: #6f8c84;
    --color-primary-dark: #273d38;
    --color-accent: #b86a3a;
    --primary-gradient: linear-gradient(135deg, #3f5e56 0%, #273d38 100%);
    --color-background: #ffffff;
    --color-surface: #ffffff;
    --color-surface-alt: #fbfaf7;
    --color-border: #e2ded6;
    --color-text-primary: #101010;
    --color-text-secondary: #4a4238;
    --color-text-muted: #8a857c;
    --color-dark: #101010;
    --color-light-gray: #f4f2ed;
    --color-cream: #fbfaf7;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --box-shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --box-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease-in-out;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: "Poppins", sans-serif;
    --font-serif: "Playfair Display", Georgia, serif;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-text-muted);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

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

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ==========================================================================
   Page Loader
   ========================================================================== */

.loader-wrapper {
    position: fixed;
    inset: 0;
    background: var(--color-dark);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-wrapper.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-container {
    text-align: center;
}

.loader-logo svg {
    width: 80px;
    height: 80px;
    margin-bottom: 2rem;
}

.loader-icon {
    fill: none;
    stroke: var(--color-primary-light);
    stroke-width: 2;
}

.loader-icon-inner {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 1.5;
    opacity: 0.5;
}

.loader-icon-line {
    stroke: var(--color-primary-light);
    stroke-width: 1.5;
    stroke-linecap: round;
}

.loader-icon-accent {
    fill: var(--color-accent);
    stroke: none;
}

.progress-bar-container {
    width: 200px;
    height: 3px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin: 0 auto;
}

.progress-bar-fill {
    height: 100%;
    width: 0;
    background: var(--primary-gradient);
    border-radius: 3px;
    animation: loaderProgress 1.8s ease-in-out forwards;
}

@keyframes loaderProgress {
    0% { width: 0; }
    100% { width: 100%; }
}

/* ==========================================================================
   Typography
   ========================================================================== */

.section-label {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.125rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.25;
    margin-bottom: 1.25rem;
}

.section-lead {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.section-desc {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    max-width: 680px;
    margin-bottom: 3rem;
}

.section-header {
    margin-bottom: 3.5rem;
}

@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    border-radius: 0;
    border: 2px solid transparent;
    transition: var(--transition);
    text-transform: uppercase;
}

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

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

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.7);
}

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

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

.btn-outline-light:hover {
    background: #fff;
    color: var(--color-primary-dark);
    border-color: #fff;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.25rem 0;
    transition: var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

.logo-accent {
    color: var(--color-accent);
}

.logo .overlay-link {
    position: absolute;
    inset: 0;
    z-index: 2;
}

.header-transparent .logo-text {
    color: #fff;
}

.header-scrolled {
    background: rgba(16, 16, 16, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.875rem 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header-scrolled .logo-text {
    color: #fff;
}

.header-active {
    z-index: 1200;
    background: rgba(16, 16, 16, 0.98);
}

/* Hamburger Menu */
.mobile-menu-toggle {
    position: relative;
    z-index: 2;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.hamburger-line {
    display: block;
    width: 28px;
    height: 2px;
    background: #fff;
    transition: var(--transition);
    transform-origin: center;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Overlay Menu */
.overlay-menu {
    position: fixed;
    inset: 0;
    background: rgba(16, 16, 16, 0.97);
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    overflow-y: auto;
}

.overlay-menu.active {
    opacity: 1;
    visibility: visible;
}

.overlay-menu-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.nav-menu {
    text-align: center;
    margin-bottom: 3rem;
}

.nav-menu li {
    margin: 0.5rem 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.overlay-menu.active .nav-menu li {
    opacity: 1;
    transform: translateY(0);
}

.overlay-menu.active .nav-menu li:nth-child(1) { transition-delay: 0.1s; }
.overlay-menu.active .nav-menu li:nth-child(2) { transition-delay: 0.15s; }
.overlay-menu.active .nav-menu li:nth-child(3) { transition-delay: 0.2s; }
.overlay-menu.active .nav-menu li:nth-child(4) { transition-delay: 0.25s; }
.overlay-menu.active .nav-menu li:nth-child(5) { transition-delay: 0.3s; }

.nav-link {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.5rem 1rem;
    display: inline-block;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
}

.overlay-footer {
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease 0.35s, transform 0.4s ease 0.35s;
}

.overlay-menu.active .overlay-footer {
    opacity: 1;
    transform: translateY(0);
}

.overlay-cta {
    margin-bottom: 2rem;
}

.overlay-contact p {
    margin: 0.25rem 0;
}

.overlay-contact a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
}

.overlay-contact a:hover {
    color: #fff;
}

/* ==========================================================================
   Hero Slider
   ========================================================================== */

.hero-slider {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: var(--color-dark);
}

.slider-wrapper {
    position: absolute;
    inset: 0;
}

.slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
}

.slide-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(16, 16, 16, 0.4) 0%,
        rgba(16, 16, 16, 0.55) 50%,
        rgba(16, 16, 16, 0.7) 100%
    );
}

.hero-content {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    padding: 1.5rem;
    text-align: center;
}

.hero-text {
    max-width: 900px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.375rem;
    font-weight: 400;
    font-style: italic;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-cta .btn {
    min-width: 180px;
    padding: 1rem 2.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.hero-cta .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

/* Slider Navigation */
.slider-nav {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 15;
    pointer-events: none;
}

.slider-btn {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    pointer-events: all;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.slider-btn svg {
    width: 24px;
    height: 24px;
}

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

/* Slider Dots */
.slider-dots {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.75rem;
    z-index: 15;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    cursor: pointer;
    padding: 0;
    transition: var(--transition);
}

.dot.active,
.dot:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.25rem;
        letter-spacing: 0.1em;
    }
    .hero-subtitle {
        font-size: 1.125rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.75rem;
        letter-spacing: 0.08em;
    }
    .hero-cta .btn {
        width: 100%;
        max-width: 280px;
    }
    .slider-btn {
        width: 40px;
        height: 40px;
    }
}

/* ==========================================================================
   Sections
   ========================================================================== */

.section {
    padding: 6rem 0;
}

.section-about {
    background: var(--color-background);
}

.section-business {
    background: var(--color-surface-alt);
}

.section-advantages {
    background: var(--color-background);
}

.section-contact {
    background: var(--color-cream);
}

/* About */
.about-image-grid {
    position: relative;
    padding-bottom: 2rem;
}

.about-img-main {
    width: 85%;
    border-radius: 0;
    box-shadow: var(--box-shadow-lg);
}

.about-img-secondary {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 55%;
    border: 6px solid #fff;
    box-shadow: var(--box-shadow);
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 5rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-border);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

@media (max-width: 768px) {
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Service Cards */
.service-card {
    background: #fff;
    padding: 2.5rem 2rem;
    height: 100%;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--color-primary);
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(63, 94, 86, 0.1);
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
}

.service-card > p {
    margin-bottom: 1.25rem;
    font-size: 0.9375rem;
}

.service-features li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.service-features li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* Advantage Cards */
.advantage-card {
    background: #fff;
    border: 1px solid var(--color-border);
    height: 100%;
    transition: var(--transition);
    overflow: hidden;
}

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

.advantage-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

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

.advantage-card:hover .advantage-image img {
    transform: scale(1.05);
}

.advantage-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.35rem 0.75rem;
}

.advantage-body {
    padding: 1.75rem;
}

.advantage-body h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.advantage-category {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.advantage-body > p:last-of-type {
    font-size: 0.9375rem;
    margin-bottom: 1rem;
}

.advantage-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.advantage-tags span {
    font-size: 0.75rem;
    padding: 0.25rem 0.625rem;
    background: var(--color-light-gray);
    color: var(--color-text-secondary);
}

.advantages-cta-text {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.0625rem;
}

/* CTA Banner */
.section-cta {
    background: var(--primary-gradient);
    padding: 5rem 0;
    color: #fff;
}

.section-cta h2 {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #fff;
}

.section-cta p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Contact */
.contact-info-list {
    margin-top: 2.5rem;
}

.contact-info-item {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(63, 94, 86, 0.1);
    color: var(--color-primary);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-info-item h4 {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.contact-info-item a {
    font-size: 1rem;
    color: var(--color-primary);
}

.contact-info-item p {
    margin: 0;
    color: var(--color-text-secondary);
}

/* Contact Form */
.contact-form {
    background: #fff;
    padding: 2.5rem;
    border: 1px solid var(--color-border);
    box-shadow: var(--box-shadow);
}

.contact-form .form-label {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.contact-form .form-control,
.contact-form .form-select {
    border: 1px solid var(--color-border);
    border-radius: 0;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    color: var(--color-text-primary);
    background: var(--color-surface-alt);
    transition: var(--transition);
}

.contact-form .form-control:focus,
.contact-form .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(63, 94, 86, 0.15);
    background: #fff;
}

.form-feedback {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
}

.form-feedback.success {
    background: rgba(63, 94, 86, 0.1);
    color: var(--color-primary-dark);
    border: 1px solid var(--color-primary);
}

.form-feedback.error {
    background: rgba(184, 106, 58, 0.1);
    color: #8b4513;
    border: 1px solid var(--color-accent);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.6);
    padding: 4rem 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
    font-size: 1.375rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.footer-brand p {
    font-size: 0.9375rem;
    line-height: 1.7;
    max-width: 360px;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #fff;
    margin-bottom: 1.25rem;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a,
.footer-contact a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9375rem;
}

.footer-links a:hover,
.footer-contact a:hover {
    color: #fff;
}

.footer-contact p {
    margin-bottom: 0.5rem;
    font-size: 0.9375rem;
}

.footer-bottom {
    padding: 1.5rem 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8125rem;
    margin: 0;
    color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 768px) {
    .footer-top {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ==========================================================================
   Scroll to Top
   ========================================================================== */

.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--box-shadow);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
}

/* ==========================================================================
   Utilities
   ========================================================================== */

@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }
}