/* 
   File: style.css 
   Theme Name: SkyZen Clone
   Description: Theme được xây dựng chuyên biệt cho dự án SkyZen - Picity Sky Park.
   Version: 1.0
   Author: AI Researcher
*/

:root {
    --primary-blue: #005596;  /* Màu xanh thương hiệu Pi Group */
    --accent-gold: #E7A614;   /* Màu vàng kim sang trọng */
    --menu-green: #8CC63F;    /* Màu nút Menu như trong screenshot */
    --text-dark: #333333;
    --text-light: #F9F9F9;
    --font-main: 'Montserrat', sans-serif;
    --container-width: 1200px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-main);
    color: var(--text-dark);
    background-color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- HEADER & NAVIGATION --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.menu-toggle-btn {
    background-color: var(--menu-green);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 20px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    transition: transform 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle-btn:hover {
    transform: scale(1.1);
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    color: white;
    text-transform: uppercase;
    text-decoration: none;
    letter-spacing: 2px;
}
.logo-text span { color: var(--menu-green); }

.site-header.scrolled.logo-text { color: var(--primary-blue); }

/* --- HERO SECTION --- */
.hero-section {
    height: 100vh;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,85,150,0.6));
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 60px;
    font-weight: 900;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-cta {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(135deg, var(--accent-gold), #D4950B);
    color: white;
    text-decoration: none;
    font-weight: 700;
    border-radius: 30px;
    text-transform: uppercase;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-cta:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(231, 166, 20, 0.4);
}

/* --- SECTIONS COMMON --- */
.section-padding {
    padding: 80px 0;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 50px;
    text-transform: uppercase;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--accent-gold);
    margin: 15px auto 0;
}

/* --- OVERVIEW GRID --- */
.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.overview-item {
    background: #f4f4f4;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s;
}

.overview-item:hover {
    transform: translateY(-10px);
    background: white;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.overview-icon {
    font-size: 40px;
    color: var(--accent-gold);
    margin-bottom: 20px;
}

.overview-item h3 { margin-bottom: 10px; color: var(--primary-blue); }

/* --- AMENITIES --- */
.amenities-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.amenity-tag {
    background: white;
    border: 1px solid var(--primary-blue);
    color: var(--primary-blue);
    padding: 10px 20px;
    border-radius: 20px;
    font-weight: 600;
}

/* --- FOOTER --- */
.site-footer {
    background-color: var(--primary-blue);
    color: white;
    padding: 60px 0 20px;
    margin-top: 50px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--accent-gold);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    font-size: 14px;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
   .hero-title { font-size: 40px; }
   .hero-subtitle { font-size: 18px; }
   .site-header { padding: 15px 20px; }
}