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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    overflow-x: hidden;
}

::selection {
    background-color: #d45530;
    color: #fff;
}

/* ===== Navbar ===== */
#navbar {
    background: transparent;
    transition: background-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#navbar.scrolled {
    background: rgba(250, 246, 240, 0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(61, 46, 36, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #d45530;
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Mobile menu */
#mobileMenu.open {
    opacity: 1;
    pointer-events: all;
}

#mobileMenu.closed {
    opacity: 0;
    pointer-events: none;
}

.mobile-link {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

#mobileMenu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

#mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobileMenu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }
#mobileMenu.open .mobile-link:nth-child(6) { transition-delay: 0.35s; }

/* Menu button animation */
#menuBtn.active .menu-line:nth-child(1) {
    transform: rotate(45deg);
    top: 50%;
}

#menuBtn.active .menu-line:nth-child(2) {
    opacity: 0;
}

#menuBtn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg);
    top: 50%;
    width: 5;
    left: 50%;
    transform: translateX(-50%) rotate(-45deg);
}

/* ===== Hero ===== */
.hero-subtitle {
    animation: fadeUp 0.8s ease forwards;
    opacity: 0;
}

.hero-title {
    animation: fadeUp 0.8s ease 0.15s forwards;
    opacity: 0;
}

.hero-text {
    animation: fadeUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-cta {
    animation: fadeUp 0.8s ease 0.45s forwards;
    opacity: 0;
}

.hero-stats {
    animation: fadeUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

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

/* Scroll indicator */
.scroll-indicator {
    animation: bounce 2s ease infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-8px); }
    60% { transform: translateX(-50%) translateY(-4px); }
}

.scroll-line {
    animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
    0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; }
}

/* Floating card */
.floating-card {
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ===== Sections ===== */
.section-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Services ===== */
.service-card {
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #d45530, #e0a552);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

/* ===== Methodology ===== */
.method-item {
    position: relative;
}

.method-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, #d45530, transparent);
    opacity: 0.3;
}

.method-item:first-child::before {
    height: 100%;
}

/* ===== Installations ===== */
.install-item {
    cursor: pointer;
}

.install-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(61, 46, 36, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    border-radius: inherit;
}

.install-item:hover::after {
    opacity: 1;
}

.install-item img {
    transition: transform 0.7s ease;
}

.install-item:hover img {
    transform: scale(1.08);
}

/* ===== Contact Form ===== */
.form-input {
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input:focus {
    border-color: #ee9a78;
    box-shadow: 0 0 0 3px rgba(228, 154, 120, 0.15);
}

.form-submit {
    position: relative;
    overflow: hidden;
}

.form-submit::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transition: left 0.5s ease;
}

.form-submit:hover::before {
    left: 100%;
}

/* ===== Back to top ===== */
.back-to-top {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: all;
}

.back-to-top:not(.visible) {
    transform: translateY(10px);
}

/* ===== Social icons ===== */
.social-icon {
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.social-icon:hover {
    transform: translateY(-2px);
}

/* ===== Divider ===== */
.divider-gradient {
    background: linear-gradient(90deg, transparent, rgba(61, 46, 36, 0.1), transparent);
}

/* ===== Responsive ===== */
@media (max-width: 767px) {
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .floating-card {
        position: relative;
        bottom: auto;
        left: auto;
        margin-top: 1rem;
        max-width: none;
    }
    
    .about-image-grid {
        gap: 0.5rem;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .install-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== Print ===== */
@media print {
    #navbar, .back-to-top, .scroll-indicator {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}