/*
Theme Name: SilkStone Commercial
Theme URI: https://silkstone.pl
Author: Bartosz Paszek
Author URI: https://numerika.ai
Description: Elegancka, minimalistyczna strona one-page dla SilkStone Commercial - pośrednictwa w obrocie nieruchomościami komercyjnymi, hotelami i gotowymi biznesami.
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: silkstone
Tags: one-column, custom-menu, featured-images, translation-ready, business
*/

/* ==================== CSS RESET & VARIABLES ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: #0a0a0a;
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525765;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    --font-family: 'Montserrat', sans-serif;
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--gray-800);
    background-color: var(--white);
}

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

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

ul {
    list-style: none;
}

/* ==================== TYPOGRAPHY ==================== */
h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h3 {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 500;
    line-height: 1.4;
}

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

.section {
    padding: 5rem 0;
}

.section-label {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    margin-bottom: 0.75rem;
}

.section-header {
    margin-bottom: 3rem;
}

.section-header p {
    margin-top: 1rem;
    color: var(--gray-600);
    max-width: 600px;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid var(--black);
    background-color: var(--black);
    color: var(--white);
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--white);
    color: var(--black);
}

/* ==================== ANIMATIONS ==================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== HEADER ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--black);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav {
    display: none;
}

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

.nav-link {
    color: var(--white);
    font-size: 0.875rem;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-link:hover {
    color: var(--gray-400);
}

/* Hamburger Menu */
.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--white);
    transition: var(--transition);
}

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

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

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

/* Mobile Menu Overlay */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--black);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

.mobile-menu .nav-list {
    flex-direction: column;
    text-align: center;
    gap: 2.5rem;
}

.mobile-menu .nav-link {
    font-size: 1.5rem;
}

/* ==================== HERO ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-100) 0%, var(--gray-200) 100%);
    padding-top: 80px;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    padding: 2rem;
}

.hero-label {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.hero h1 {
    margin-bottom: 1.5rem;
    color: var(--black);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--gray-600);
    margin-bottom: 2.5rem;
    font-weight: 400;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
}

.scroll-indicator svg {
    width: 24px;
    height: 24px;
    stroke: var(--gray-500);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ==================== ABOUT SECTION ==================== */
.about {
    background-color: var(--white);
}

.about-grid {
    display: grid;
    gap: 3rem;
}

.about-image-wrapper {
    position: relative;
    max-width: 400px;
    margin: 0 auto;
}

.about-image-wrapper::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 2px solid var(--black);
    z-index: 0;
}

.about-image {
    position: relative;
    z-index: 1;
    aspect-ratio: 4/5;
    object-fit: cover;
    width: 100%;
}

.about-content h2 {
    margin-bottom: 0.5rem;
}

.license-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--gray-100);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.about-content p {
    margin-bottom: 1rem;
    color: var(--gray-700);
}

.about-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.badge {
    padding: 0.75rem 1rem;
    background-color: var(--gray-100);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-700);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--gray-200);
}

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

.stat-number {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--black);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-top: 0.5rem;
}

/* ==================== SPECIALIZATIONS ==================== */
.specializations {
    background-color: var(--gray-100);
}

.spec-grid {
    display: grid;
    gap: 1.5rem;
}

.spec-card {
    background-color: var(--white);
    padding: 2rem;
    transition: var(--transition);
}

.spec-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.spec-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
}

.spec-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--black);
}

.spec-card h3 {
    margin-bottom: 1rem;
}

.spec-card ul {
    color: var(--gray-600);
}

.spec-card li {
    padding: 0.25rem 0;
    padding-left: 1rem;
    position: relative;
}

.spec-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background-color: var(--gray-400);
    border-radius: 50%;
}

/* ==================== ADVANTAGES ==================== */
.advantages {
    background-color: var(--white);
}

.adv-grid {
    display: grid;
    gap: 1.5rem;
}

.adv-card {
    padding: 2rem;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.adv-card:hover {
    border-color: var(--black);
}

.adv-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
}

.adv-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--black);
}

.adv-card h3 {
    margin-bottom: 0.75rem;
}

.adv-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

/* ==================== PROCESS ==================== */
.process {
    background-color: var(--black);
    color: var(--white);
    overflow: hidden;
}

.process .section-label {
    color: var(--gray-400);
}

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

.process .section-header p {
    color: var(--gray-400);
    margin-left: auto;
    margin-right: auto;
}

.process-timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0;
}

/* Vertical line for mobile */
.process-timeline::before {
    content: '';
    position: absolute;
    left: 35px;
    top: 40px;
    bottom: 40px;
    width: 2px;
    background: linear-gradient(to bottom, var(--gray-700), var(--gray-600), var(--gray-700));
}

.process-step {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    padding: 1.5rem 0;
    position: relative;
}

.step-indicator {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
}

.step-number-circle {
    width: 70px;
    height: 70px;
    border: 2px solid var(--gray-600);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--black);
    transition: var(--transition);
}

.step-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-500);
    transition: var(--transition);
}

.process-step:hover .step-number-circle {
    border-color: var(--white);
    background-color: var(--white);
}

.process-step:hover .step-number {
    color: var(--black);
}

.step-content {
    padding-top: 0.75rem;
}

.step-content h3 {
    color: var(--white);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.step-content p {
    color: var(--gray-400);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.step-icon {
    display: none;
}

/* ==================== CONTACT ==================== */
.contact {
    background-color: var(--gray-100);
}

.contact-wrapper {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-subtitle {
    color: var(--gray-600);
    margin-top: 1rem;
    margin-bottom: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    font-weight: 400;
}

.contact-item svg {
    width: 24px;
    height: 24px;
    stroke: var(--black);
    flex-shrink: 0;
}

.contact-item a:hover {
    color: var(--gray-600);
}

.contact-cta {
    margin-top: 3rem;
}

/* ==================== FOOTER ==================== */
.footer {
    background-color: var(--black);
    color: var(--white);
    padding: 3rem 0;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-logo img {
    height: 40px;
    width: auto;
}

.footer-contact {
    font-size: 0.875rem;
    color: var(--gray-400);
}

.footer-contact a:hover {
    color: var(--white);
}

.footer-license {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--gray-500);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* ==================== SCROLL TO TOP ==================== */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background-color: var(--black);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 100;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background-color: var(--gray-800);
}

.scroll-top svg {
    width: 24px;
    height: 24px;
    stroke: var(--white);
}

/* ==================== RESPONSIVE ==================== */
@media (min-width: 480px) {
    .spec-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .section {
        padding: 7rem 0;
    }

    .hamburger {
        display: none;
    }

    .nav {
        display: block;
    }

    .about-grid {
        grid-template-columns: 1fr 1.5fr;
        gap: 4rem;
        align-items: center;
    }

    .about-image-wrapper {
        margin: 0;
    }

    /* Process section desktop */
    .process-timeline {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: 0;
    }

    .process-timeline::before {
        left: 35px;
        right: 35px;
        top: 35px;
        bottom: auto;
        height: 2px;
        width: auto;
        background: linear-gradient(to right, var(--gray-700), var(--gray-500), var(--gray-700));
    }

    .process-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
        flex: 1;
        padding: 0 0.5rem;
        gap: 1.5rem;
    }

    .step-content {
        padding-top: 0;
    }

    .step-content h3 {
        font-size: 1.125rem;
    }

    .step-content p {
        font-size: 0.875rem;
    }

    .footer-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .footer-bottom {
        flex-direction: row;
        gap: 2rem;
    }
}

@media (min-width: 1024px) {
    .spec-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .adv-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .spec-card {
        padding: 2.5rem;
    }

    .adv-card {
        padding: 2.5rem;
    }
}

@media (min-width: 1200px) {
    .container {
        padding: 0 2rem;
    }

    .section {
        padding: 8rem 0;
    }
}