/* ============================================
   Koblovsky & Giovanni — Styles
   Nordic Minimalist Design
   ============================================ */

/* --- Custom Properties --- */
:root {
    /* Nordic palette */
    --color-bg: #fdfcfb;
    --color-bg-warm: #f0ebe3;
    --color-bg-cool: #e8eff5;
    --color-bg-mid: #f7f4f0;
    --color-bg-dark: #1e2e38;
    --color-bg-card: #fdfcfb;

    --color-text: #1a2630;
    --color-text-secondary: #4a6070;
    --color-text-light: #fdfcfb;
    --color-text-muted: #7a96a8;

    --color-accent: #5b8fa8;
    --color-accent-light: #7eafc2;
    --color-border: #d4e0e9;
    --color-border-light: #e8eff5;

    /* Typography */
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 3rem;
    --space-xl: 5rem;
    --space-2xl: 8rem;

    /* Layout */
    --container-max: 1200px;
    --header-height: 72px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-sans);
    font-weight: 300;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

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

ul {
    list-style: none;
}

/* --- Container --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    background-color: transparent;
    border-bottom: 1px solid transparent;
    transition: border-color 0.4s ease, background-color 0.4s ease, backdrop-filter 0.4s ease;
}

.header.scrolled {
    background-color: rgba(253, 252, 251, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom-color: var(--color-border);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: #fdfcfb;
    transition: color 0.4s ease;
}

.header.scrolled .logo-main {
    color: var(--color-text);
}

.nav {
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(253, 252, 251, 0.75);
    transition: color 0.4s ease;
    position: relative;
}

.header.scrolled .nav-link {
    color: var(--color-text-secondary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: #fdfcfb;
}

.header.scrolled .nav-link:hover {
    color: var(--color-text);
}

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

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background-color: #fdfcfb;
    transition: all 0.4s ease;
}

.header.scrolled .menu-toggle span {
    background-color: var(--color-text);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -5px);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + var(--space-2xl)) 2rem var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 40%;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(30, 46, 56, 0.38) 0%,
        rgba(30, 46, 56, 0.58) 100%
    );
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #7eafc2;
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: #fdfcfb;
    margin-bottom: var(--space-lg);
}

.hero-description {
    font-size: 1.1rem;
    font-weight: 300;
    line-height: 1.8;
    color: rgba(232, 239, 245, 0.85);
    max-width: 540px;
    margin-bottom: var(--space-xl);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 1rem 2.5rem;
    border: 1px solid var(--color-text);
    color: var(--color-text);
    background: transparent;
    transition: all 0.4s ease;
    cursor: pointer;
}

.btn:hover {
    background-color: var(--color-text);
    color: var(--color-bg);
}

.btn-primary {
    border-color: rgba(126, 175, 194, 0.7);
    color: #fdfcfb;
}

.btn-primary:hover {
    background-color: #7eafc2;
    border-color: #7eafc2;
    color: #fdfcfb;
}

.btn-submit {
    border-color: var(--color-text-light);
    color: var(--color-text-light);
    width: 100%;
    padding: 1.1rem 2.5rem;
    margin-top: var(--space-sm);
}

.btn-submit:hover {
    background-color: var(--color-text-light);
    color: var(--color-bg-dark);
}

/* --- Sections --- */
.section {
    padding: var(--space-2xl) 0;
}

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

.section-dark {
    background-color: var(--color-bg-dark);
    color: var(--color-text-light);
    position: relative;
    overflow: hidden;
}

.section-dark > .container {
    position: relative;
    z-index: 1;
}

.section-grid {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.section-label {
    padding-top: 0.3rem;
}

.label-text {
    font-size: 0.78rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.label-text-light {
    color: var(--color-text-muted);
}

.label-line {
    width: 40px;
    height: 1px;
    background-color: var(--color-border);
    margin-top: var(--space-sm);
}

.label-line-light {
    background-color: rgba(126, 175, 194, 0.3);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 400;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-lg);
}

.section-title-light {
    color: var(--color-text-light);
}

.section-intro {
    font-size: 1.05rem;
    font-weight: 300;
    line-height: 1.8;
    color: var(--color-text-secondary);
    max-width: 600px;
}

.section-intro-light {
    color: rgba(232, 239, 245, 0.70);
}

/* --- Content Columns --- */
.content-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.content-col p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

/* --- About Image Banner --- */
.about-image-banner {
    width: 100%;
    height: 400px;
    overflow: hidden;
    margin-bottom: var(--space-xl);
}

.about-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 30%;
    filter: saturate(0.65) brightness(1.04) hue-rotate(10deg);
}

/* --- Energy Image Banner --- */
.image-banner {
    position: relative;
    height: 380px;
    overflow: hidden;
}

.banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(30, 46, 56, 0.30) 0%,
        rgba(30, 46, 56, 0.65) 100%
    );
}

.banner-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg) 2rem;
}

.banner-text {
    max-width: var(--container-max);
    margin: 0 auto;
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    font-weight: 400;
    color: var(--color-text-light);
    letter-spacing: 0.01em;
}

/* --- Values Strip --- */
.values-strip {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg-cool);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.value-item {
    padding-right: var(--space-lg);
}

.value-number {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--color-accent);
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: var(--space-sm);
}

.value-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 400;
    margin-bottom: var(--space-xs);
}

.value-text {
    font-size: 0.88rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* --- Services --- */
.services-list {
    max-width: 900px;
    margin-left: auto;
}

.service-item {
    border-top: 1px solid var(--color-border);
}

.service-item:last-child {
    border-bottom: 1px solid var(--color-border);
}

.service-header {
    display: flex;
    align-items: center;
    padding: var(--space-md) 0;
    cursor: pointer;
    gap: var(--space-md);
}

.service-number {
    font-size: 0.8rem;
    color: var(--color-accent);
    min-width: 2rem;
    font-weight: 400;
}

.service-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 400;
    flex: 1;
}

.service-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.toggle-icon {
    position: relative;
    width: 14px;
    height: 14px;
}

.toggle-icon::before,
.toggle-icon::after {
    content: '';
    position: absolute;
    background-color: var(--color-text-secondary);
    transition: transform 0.3s ease;
}

.toggle-icon::before {
    width: 14px;
    height: 1px;
    top: 50%;
    left: 0;
}

.toggle-icon::after {
    width: 1px;
    height: 14px;
    left: 50%;
    top: 0;
}

.service-item.active .toggle-icon::after {
    transform: rotate(90deg);
}

.service-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease;
}

.service-content {
    padding: 0 0 var(--space-lg) 3.5rem;
}

.service-content p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.service-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem var(--space-lg);
}

.service-list li {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    padding-left: 1.2rem;
    position: relative;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: var(--color-accent);
}

/* --- Contact Background Image --- */
.contact-bg-image {
    position: absolute;
    top: 0;
    right: 0;
    width: 35%;
    height: 100%;
    opacity: 0.08;
}

.contact-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}

/* --- Contact --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    max-width: 900px;
    margin-left: auto;
}

.contact-block {
    margin-bottom: var(--space-lg);
}

.contact-heading {
    font-size: 0.78rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(126, 175, 194, 0.75);
    margin-bottom: var(--space-sm);
}

.contact-text {
    font-size: 0.95rem;
    line-height: 1.8;
    color: rgba(232, 239, 245, 0.80);
}

.contact-link {
    color: rgba(232, 239, 245, 0.80);
    transition: color 0.3s ease;
    border-bottom: 1px solid rgba(126, 175, 194, 0.25);
}

.contact-link:hover {
    color: #fdfcfb;
    border-bottom-color: rgba(126, 175, 194, 0.6);
}

/* --- Form --- */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(126, 175, 194, 0.75);
    margin-bottom: var(--space-xs);
}

.form-input {
    width: 100%;
    padding: 0.85rem 0;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 300;
    color: rgba(232, 239, 245, 0.90);
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(126, 175, 194, 0.25);
    outline: none;
    transition: border-color 0.3s ease;
}

.form-input:focus {
    border-bottom-color: #7eafc2;
}

.form-input::placeholder {
    color: rgba(126, 175, 194, 0.35);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* --- Footer --- */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
}

.footer-tagline {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 0.2rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.04em;
    transition: color 0.3s ease;
}

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

.footer-legal p {
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

/* --- Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .section-grid {
        grid-template-columns: 160px 1fr;
    }

    .values-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }

    .value-item {
        padding-right: var(--space-md);
    }

    .service-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-2xl: 5rem;
        --space-xl: 3.5rem;
        --header-height: 64px;
    }

    /* Mobile nav */
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2rem;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav.open {
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        font-size: 1.1rem;
    }

    /* Sections */
    .section-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .content-columns {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .values-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .services-list,
    .contact-grid {
        margin-left: 0;
    }

    .about-image-banner {
        height: 280px;
    }

    .image-banner {
        height: 260px;
    }

    .contact-bg-image {
        display: none;
    }

    .hero-title {
        font-size: clamp(2.2rem, 8vw, 3.5rem);
    }

    .service-content {
        padding-left: 0;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.25rem;
    }

    .hero {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    .header-inner {
        padding: 0 1.25rem;
    }

    .about-image-banner {
        height: 220px;
    }

    .image-banner {
        height: 200px;
    }
}