/* Define Core Variables & Configuration */
:root {
    /* Colors tailored to the logo/attachment */
    --color-orange: #f97316; /* Tailwind orange-500 equivalent */
    --color-orange-hover: #ea580c; 
    --color-brand-silver: #d4d4d8;
    
    --color-bg-base: #18181b; /* zinc-900 */
    --color-bg-darker: #09090b; /* zinc-950 */
    --color-bg-card: #27272a; /* zinc-800 */
    
    --color-text-main: #f4f4f5; /* zinc-100 */
    --color-text-muted: #a1a1aa; /* zinc-400 */
    --color-border: #3f3f46; /* zinc-700 */

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

    --transition-speed: 0.3s;
    --border-radius: 6px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.bg-gray-900 { background-color: var(--color-bg-base); }
.bg-gray-950 { background-color: var(--color-bg-darker); }
.text-orange { color: var(--color-orange); }
.text-gray-100 { color: var(--color-text-main); }
.text-gray-400 { color: var(--color-text-muted); }
.border-t { border-top: 1px solid var(--color-border); }
.border-gray-800 { border-color: var(--color-border); }
.mt-4 { margin-top: 1rem; }
.w-full { width: 100%; }
.text-center { text-align: center; }
.hidden { display: none !important; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-speed);
}

.btn-icon { margin-right: 0.5rem; }

.btn-primary {
    background: transparent;
    color: var(--color-text-main);
    border-color: var(--color-border);
}
.btn-primary:hover {
    border-color: var(--color-orange);
    color: var(--color-orange);
}

.btn-orange {
    background-color: var(--color-orange);
    color: #fff;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
}
.btn-orange:hover {
    background-color: var(--color-orange-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Typography Headings */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.2;
    margin-bottom: 1rem;
}

/* Header & Navigation */
.header {
    background-color: rgba(24, 24, 27, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-speed);
    z-index: 50;
}
.header.sticky {
    position: sticky;
    top: 0;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.brand {
    display: flex;
    flex-direction: column;
    padding: 0.5rem 0;
}

.brand-asm {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 2rem;
    line-height: 1;
    background: linear-gradient(180deg, #fff 0%, #a1a1aa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

.brand-sub {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--color-orange);
    letter-spacing: 0.15em;
    margin-top: 0.1rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-list {
    display: flex;
    gap: 2rem;
}

.nav-item {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.nav-item:hover {
    color: var(--color-orange);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 6rem 0;
    overflow: hidden;
}

.hero-pattern {
    background-image: radial-gradient(var(--color-border) 1px, transparent 1px);
    background-size: 24px 24px;
}

.hero-layout {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(249, 115, 22, 0.1);
    color: var(--color-orange);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(249, 115, 22, 0.2);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-inline: auto;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.hero-guarantee {
    font-weight: 500;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-header {
    margin-bottom: 4rem;
    text-align: center;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    text-transform: uppercase;
}

.section-header p {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: 2rem;
}

.services-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Cards */
.card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 2.5rem 2rem;
    position: relative;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.service-card.line-hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-orange);
    transition: width var(--transition-speed) ease;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.service-card.line-hover:hover::before {
    width: 100%;
}

.card.border-orange {
    border-color: rgba(249, 115, 22, 0.4);
    background: linear-gradient(to bottom, rgba(249, 115, 22, 0.05), var(--color-bg-card));
}

.card-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: 0 2px 10px rgba(249, 115, 22, 0.3);
}

.bg-orange { background-color: var(--color-orange); }

.card-icon {
    font-size: 2.5rem;
    color: var(--color-brand-silver);
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.card-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Advantages Section */
.advantages-grid {
    grid-template-columns: repeat(3, 1fr);
    text-align: center;
}

.advantage-item {
    padding: 2rem;
}

.adv-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--color-text-main);
    transition: all var(--transition-speed);
}

.advantage-item:hover .adv-icon {
    transform: scale(1.1);
    border-color: var(--color-orange);
    color: var(--color-orange);
}

.advantage-item.highlight .adv-icon {
    background-color: rgba(249, 115, 22, 0.1);
    border-color: var(--color-orange);
    color: var(--color-orange);
}

/* Contact / Form Section */
.cta-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-info-list {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.info-row i {
    font-size: 2rem;
    color: var(--color-orange);
}

.info-row div {
    display: flex;
    flex-direction: column;
}

.info-row strong {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.info-row a {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.info-row a:hover {
    color: var(--color-orange);
}

.cta-form-wrapper {
    background-color: var(--color-bg-card);
    padding: 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.contact-form h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 1rem;
    background-color: var(--color-bg-base);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-main);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-orange);
}

.form-group input.invalid {
    border-color: #ef4444; /* red */
}

.error-msg {
    display: none;
    color: #ef4444;
    font-size: 0.75rem;
    margin-top: 0.25rem;
}

.form-group.has-error .error-msg {
    display: block;
}

.form-success {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid #22c55e;
    border-radius: 4px;
    text-align: center;
    font-weight: 500;
}

/* Footer Section */
.footer {
    background-color: var(--color-bg-darker);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--color-text-muted);
}
.footer-links a:hover {
    color: var(--color-text-main);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* Modals */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background-color: var(--color-bg-card);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    z-index: 101;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.modal-close:hover {
    color: var(--color-text-main);
}

.modal-body {
    padding: 2rem;
}

.modal-body p {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
}

/* Before/After Slider */
.slider-wrapper {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    border: 1px solid var(--color-border);
}

.comparison-slider {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    user-select: none;
    -webkit-user-drag: none;
    touch-action: pan-y;
}

.image-container {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    pointer-events: none;
}

.after-image-base {
    z-index: 1;
}

.before-image-overlay {
    z-index: 2;
    clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.slider-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 0;
    z-index: 3;
    pointer-events: none;
}

.slider-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: -2px;
    width: 4px;
    background-color: var(--color-orange);
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.slider-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background-color: var(--color-orange);
    border: 3px solid #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px rgba(0,0,0,0.5);
    pointer-events: auto;
    cursor: ew-resize;
    font-size: 1.2rem;
    transition: background-color var(--transition-speed);
}

.slider-button:hover, .slider-button:active {
    background-color: var(--color-orange-hover);
}

.slider-label {
    position: absolute;
    top: 20px;
    padding: 0.5rem 1rem;
    background: rgba(24, 24, 27, 0.8);
    backdrop-filter: blur(4px);
    color: var(--color-text-main);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: 4px;
    letter-spacing: 1px;
    transition: opacity 0.3s ease;
    z-index: 4;
    border: 1px solid rgba(255,255,255,0.1);
    pointer-events: none;
}

.label-before { left: 20px; }
.label-after { right: 20px; }

.is-dragging .slider-label {
    opacity: 0;
}

/* Responsive Media Queries */
@media (max-width: 900px) {
    .cta-container {
        grid-template-columns: 1fr;
    }
    
    .cta-form-wrapper {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: var(--color-bg-base);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-150%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-speed) ease-in-out;
    }

    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }

    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }

    .hero {
        padding: 4rem 0;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        margin-bottom: 2rem;
    }
}