/* ==========================================================================
   Design System & Variables - Rakennusportti
   ========================================================================== */
:root {
    /* Color Palette */
    --color-primary: #C5A880; /* Warm Wood/Gold accent */
    --color-primary-dark: #A68A62;
    --color-dark: #1E2322; /* Charcoal */
    --color-dark-muted: #2A302F;
    --color-light: #F7F7F6; /* Concrete light */
    --color-white: #FFFFFF;
    --color-text: #454D4B;
    --color-text-light: #8E9997;

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

    /* Spacing & Layout */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --border-radius-sm: 4px;
    --border-radius-md: 12px;
    --border-radius-lg: 24px;
    --border-radius-full: 9999px;

    /* Effects */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);

    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-dark);
}
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.mt-4 { margin-top: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-md); }

/* Utilities */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}
.section-padding { padding: var(--spacing-xl) 0; }
.text-center { text-align: center; }
.bg-light { background-color: var(--color-light); }
.section-dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark p {
    color: var(--color-white);
}

/* Glassmorphism */
.glass-card {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-heading);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid transparent;
}
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}
.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.btn-outline-light {
    background-color: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
}
.btn-outline-light:hover {
    background-color: var(--color-white);
    color: var(--color-dark);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0; left: 0; width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
    padding: 1.25rem 0;
}
.navbar.scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-sm);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    color: var(--color-dark);
}
.nav-links { display: none; gap: var(--spacing-md); }
.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-text);
    position: relative;
    padding-bottom: 4px;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-normal);
}
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: var(--spacing-sm); }
.nav-actions .btn { padding: 0.6rem 1.4rem; font-size: 0.85rem; }

.mobile-menu-btn {
    display: block; background: none; border: none; cursor: pointer;
    width: 30px; height: 20px; position: relative; z-index: 1001;
}
.mobile-menu-btn span {
    display: block; width: 100%; height: 2px; background-color: var(--color-dark);
    position: absolute; transition: all var(--transition-normal);
}
.mobile-menu-btn span:nth-child(1) { top: 0; }
.mobile-menu-btn span:nth-child(2) { top: 9px; }
.mobile-menu-btn span:nth-child(3) { top: 18px; }
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
}
.hero-background {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    /* Actual placeholder image from the site */
    background-image: linear-gradient(rgba(30, 35, 34, 0.7), rgba(30, 35, 34, 0.8)), url('https://impro.usercontent.one/appid/zonerWsb/domain/rakennusportti.fi/media/rakennusportti.fi/onewebmedia/Pankkopolku_1_visu24.fi.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    z-index: 0;
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}
.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}
.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1.05;
    margin-bottom: var(--spacing-md);
}
.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--color-light);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}
.hero-buttons { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; }

/* Sections Common */
.section-title { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: var(--spacing-xs); }
.section-subtitle { font-size: 1.1rem; color: var(--color-text-light); margin-bottom: var(--spacing-lg); }
.section-subtitle-large { font-size: 1.5rem; margin-bottom: var(--spacing-sm); color: var(--color-primary); }

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}
.feature-card {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    transition: transform var(--transition-normal);
    background: var(--color-light);
    border: none;
}
.feature-card:hover { transform: translateY(-10px); }
.feature-card .icon { font-size: 3rem; margin-bottom: var(--spacing-sm); }
.feature-card h3 { margin-bottom: var(--spacing-sm); font-size: 1.4rem; }

/* Services */
.services-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}
.services-list { margin-bottom: var(--spacing-md); }
.services-list li {
    display: flex; align-items: flex-start; gap: 10px;
    margin-bottom: 12px; font-size: 1.1rem;
}
.services-list .check { color: var(--color-primary); font-weight: bold; }
.rounded-image { border-radius: var(--border-radius-sm); object-fit: cover; width: 100%; }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* References */
.references-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}
.reference-card {
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-slow);
}
.hover-lift:hover { transform: translateY(-10px); box-shadow: var(--shadow-xl); }
.reference-image { height: 250px; overflow: hidden; }
.reference-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.reference-card:hover .reference-image img { transform: scale(1.05); }
.reference-content { padding: var(--spacing-md); }
.reference-content h3 { font-size: 1.25rem; margin-bottom: var(--spacing-xs); }

/* CTA */
.contact-link { font-size: 2.5rem; font-family: var(--font-heading); font-weight: 700; color: var(--color-primary); }
.contact-link:hover { color: var(--color-white); }

/* Footer */
.footer { background-color: var(--color-dark-muted); color: var(--color-light); padding-top: var(--spacing-xl); padding-bottom: var(--spacing-sm); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); }
.footer-brand p { margin-top: var(--spacing-xs); color: var(--color-text-light); max-width: 300px; }
.footer-links ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer h4 { color: var(--color-white); font-size: 1.2rem; margin-bottom: var(--spacing-sm); }
.footer-links a, .footer-contact a { color: var(--color-text-light); }
.footer-links a:hover, .footer-contact a:hover { color: var(--color-primary); }
.footer-bottom { font-size: 0.85rem; color: var(--color-text-light); border-top: 1px solid rgba(255,255,255,0.1); padding-top: var(--spacing-md); }

/* Animations */
.fade-up { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* Media Queries */
@media (min-width: 768px) {
    .services-wrapper { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}
@media (min-width: 1024px) {
    .mobile-menu-btn { display: none; }
    .nav-links { display: flex; }
    .nav-actions .btn { display: inline-flex; }
}
.nav-links.mobile-active {
    display: flex; flex-direction: column; position: absolute; top: 100%; left: 0;
    width: 100%; background: var(--color-white); padding: var(--spacing-md);
    box-shadow: var(--shadow-md); align-items: center;
}
.nav-links.mobile-active a { font-size: 1.25rem; padding: 10px; }