/* ==========================================================================
   CSS SYSTEM FOR HOANG PHAT HP WORDPRESS THEME
   Vanilla CSS with premium construction/industrial aesthetics
   ========================================================================== */

/* 1. CSS VARIABLES (DESIGN TOKENS)
   ========================================================================== */
:root {
    /* Color Palette */
    --color-primary: #1d2126;       /* Xám bê tông siêu đậm / Đen kim loại */
    --color-secondary: #ff6b00;     /* Cam xây dựng / Cam cảnh báo (Accent) */
    --color-accent-hover: #d95a00;  /* Cam đậm khi hover */
    --color-neutral-dark: #2c3138;  /* Xám than đá */
    --color-neutral-grey: #6c757d;  /* Xám thường */
    --color-neutral-light: #f8f9fa; /* Xám bê tông nhạt / Nền phụ */
    --color-concrete: #d1d5db;      /* Xám bê tông thô */
    --color-white: #ffffff;
    --color-dark-rgba: rgba(29, 33, 38, 0.9);
    
    /* Typography */
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Spacing & Borders */
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    --box-shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.05);
    --box-shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 15px 40px rgba(255, 107, 0, 0.15);
}

/* 2. BASE STYLES & RESET
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-neutral-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.3;
}

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

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

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 3. BUTTONS & UI ELEMENTS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
    gap: 8px;
}

.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 107, 0, 0.3);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
}

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-phone {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-phone:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
    border-radius: var(--border-radius-sm);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* 4. LAYOUT: HEADER (TOP BAR & MASTHEAD)
   ========================================================================== */
/* Top Bar */
.top-bar {
    background-color: var(--color-neutral-light);
    color: var(--color-neutral-dark);
    font-size: 13px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.top-bar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.top-bar-left span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.top-bar-right {
    display: flex;
    gap: 20px;
}

.top-bar-right a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-neutral-dark);
}

.top-bar-right a:hover {
    color: var(--color-secondary);
}

/* Site Header */
.site-header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    transition: var(--transition-smooth);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Brand Logo */
.site-branding .site-title {
    margin: 0;
    line-height: 1;
}

.site-branding .site-title a {
    color: var(--color-primary);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    white-space: nowrap;
}

.site-branding .site-title a span:first-child {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-neutral-grey);
    text-transform: uppercase;
}

.site-branding .site-title a span.accent {
    font-size: 22px;
    font-weight: 800;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: -0.5px;
}

/* Navigation Menu */
.main-navigation {
    display: flex;
    align-items: center;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-primary);
    cursor: pointer;
}

.menu-main-container ul.menu {
    display: flex;
    gap: 28px;
}

.menu-main-container ul.menu li a {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 15px;
    color: var(--color-primary);
    position: relative;
    padding: 8px 0;
}

.menu-main-container ul.menu li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--color-secondary);
    transition: var(--transition-smooth);
}

.menu-main-container ul.menu li a:hover {
    color: var(--color-secondary);
}

.menu-main-container ul.menu li a:hover::after {
    width: 100%;
}

.header-cta {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 5. HOMEPAGE SECTIONS
   ========================================================================== */
/* Hero Section */
.hero-section {
    background-image: linear-gradient(to right, rgba(29, 33, 38, 0.75) 35%, rgba(29, 33, 38, 0.3) 100%), url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?auto=format&fit=crop&q=80&w=1920');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    height: 80vh;
    min-height: 600px;
    position: relative;
    display: flex;
    align-items: center;
    color: var(--color-white);
    overflow: hidden;
}

.hero-container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 700px;
}

.hero-badge {
    background-color: rgba(255, 107, 0, 0.15);
    border: 1px solid var(--color-secondary);
    color: var(--color-secondary);
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-block;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 35px;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.hero-scroll-down a {
    color: var(--color-white);
    font-size: 24px;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.hero-scroll-down a:hover {
    opacity: 1;
    color: var(--color-secondary);
}

/* Stats Section */
.stats-section {
    background-color: var(--color-primary);
    padding: 40px 0;
    border-bottom: 4px solid var(--color-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    border-left: 2px solid rgba(255, 255, 255, 0.1);
}

.stat-card:first-child {
    border-left: none;
}

.stat-icon {
    font-size: 36px;
    color: var(--color-secondary);
}

.stat-info {
    color: var(--color-white);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 800;
}

.stat-unit {
    color: var(--color-secondary);
    font-size: 24px;
    font-weight: 700;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 4px;
}

/* Common Section Styles */
section {
    padding: 90px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}

.section-tagline {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 13px;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-bottom: 12px;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
}

.section-desc {
    color: var(--color-neutral-grey);
    font-size: 16px;
}

/* Services Section */
.services-section {
    background-color: var(--color-neutral-light);
}

.services-wrapper {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.service-category-block {
    background-color: var(--color-white);
    padding: 40px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow-subtle);
    border-top: 4px solid var(--color-concrete);
    transition: var(--transition-smooth);
}

.service-category-block:hover {
    box-shadow: var(--box-shadow-medium);
}

.service-cat-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.service-cat-header h3 {
    font-size: 24px;
    font-weight: 800;
}

.service-cat-icon {
    font-size: 28px;
}

.text-orange {
    color: var(--color-secondary);
}

.text-grey {
    color: var(--color-neutral-dark);
}

.service-cat-intro {
    color: var(--color-neutral-grey);
    margin-bottom: 30px;
    font-size: 16px;
}

.service-items-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-item-card {
    background-color: var(--color-neutral-light);
    padding: 30px;
    border-radius: var(--border-radius-sm);
    position: relative;
    transition: var(--transition-smooth);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

.service-item-card:hover {
    background-color: var(--color-white);
    box-shadow: var(--box-shadow-hover);
    border-color: rgba(255, 107, 0, 0.2);
    transform: translateY(-5px);
}

.service-item-number {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 32px;
    color: rgba(29, 33, 38, 0.05);
    position: absolute;
    top: 20px;
    right: 20px;
}

.service-item-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    padding-right: 30px;
}

.service-item-card p {
    color: var(--color-neutral-grey);
    font-size: 14px;
    line-height: 1.6;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.about-images {
    position: relative;
}

.about-img-large {
    background-image: url('https://images.unsplash.com/photo-1541888946425-d81bb19240f5?auto=format&fit=crop&q=80&w=800');
    background-size: cover;
    background-position: center;
    height: 500px;
    border-radius: var(--border-radius-md);
    position: relative;
    box-shadow: var(--box-shadow-medium);
}

.about-decorative-box {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 4px solid var(--color-secondary);
    top: 20px;
    left: -20px;
    z-index: -1;
    border-radius: var(--border-radius-md);
}

.construction-badge {
    position: absolute;
    bottom: 30px;
    right: -20px;
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: 20px;
    border-radius: var(--border-radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 10px 20px rgba(255, 107, 0, 0.3);
}

.badge-num {
    font-family: var(--font-heading);
    font-size: 28px;
    font-weight: 800;
    line-height: 1;
}

.badge-lbl {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

.lead-text {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.about-content p {
    color: var(--color-neutral-grey);
    margin-bottom: 25px;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 35px;
}

.feature-item {
    display: flex;
    gap: 15px;
}

.feature-icon {
    font-size: 20px;
    color: var(--color-secondary);
    margin-top: 3px;
}

.feature-text h5 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 14px;
    color: var(--color-neutral-grey);
    margin-bottom: 0;
}

.about-director-quote {
    border-left: 3px solid var(--color-secondary);
    padding-left: 20px;
    margin-top: 30px;
    background-color: var(--color-neutral-light);
    padding: 20px;
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
}

.about-director-quote blockquote {
    font-style: italic;
    color: var(--color-primary);
    font-size: 15px;
    margin-bottom: 10px;
}

.about-director-quote cite {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-neutral-grey);
}

/* Process Section */
.process-section {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.process-section .section-title {
    color: var(--color-white);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    margin-top: 60px;
}

.process-timeline::after {
    content: '';
    position: absolute;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.1);
    width: 100%;
    top: 35px;
    left: 0;
    z-index: 1;
}

.process-step {
    position: relative;
    z-index: 2;
}

.step-number {
    width: 70px;
    height: 70px;
    background-color: var(--color-neutral-dark);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 800;
    color: var(--color-secondary);
    margin-bottom: 25px;
    transition: var(--transition-smooth);
}

.process-step:hover .step-number {
    border-color: var(--color-secondary);
    background-color: var(--color-secondary);
    color: var(--color-white);
    box-shadow: 0 0 20px rgba(255, 107, 0, 0.5);
    transform: scale(1.05);
}

.step-content h4 {
    font-size: 18px;
    color: var(--color-white);
    margin-bottom: 12px;
}

.step-content p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

/* Projects Section */
.projects-section {
    background-color: var(--color-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.project-card {
    background-color: var(--color-neutral-light);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--box-shadow-subtle);
    transition: var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-medium);
}

.project-img-placeholder {
    height: 260px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    position: relative;
    padding: 20px;
    text-align: center;
}

.project-img-placeholder span {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 18px;
    margin-top: 15px;
    z-index: 2;
}

.project-img-placeholder::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    top: 0;
    left: 0;
    z-index: 1;
}

.project-icon {
    font-size: 48px;
    z-index: 2;
    color: var(--color-secondary);
}

.concrete-pour {
    background-image: url('../images/project-1.png');
    background-size: cover;
    background-position: center;
}

.polished-concrete {
    background-image: url('../images/project-2.png');
    background-size: cover;
    background-position: center;
}

.concrete-road {
    background-image: url('../images/project-3.png');
    background-size: cover;
    background-position: center;
}

.hardener-floor {
    background-image: url('../images/project-4.png');
    background-size: cover;
    background-position: center;
}

.project-info {
    padding: 25px;
}

.project-tag {
    display: inline-block;
    background-color: rgba(255, 107, 0, 0.1);
    color: var(--color-secondary);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 12px;
}

.project-info h4 {
    font-size: 16px;
    line-height: 1.5;
    font-weight: 600;
}

/* Contact Section */
.contact-section {
    background-color: var(--color-neutral-light);
    padding: 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
}

.contact-info-panel {
    background-color: var(--color-primary);
    padding: 90px 60px;
    color: var(--color-white);
}

.text-white {
    color: var(--color-white) !important;
}

.text-light {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.contact-info-cards {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-card {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.info-card-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    font-size: 20px;
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.info-card-text span {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.info-card-text strong, .info-card-text a {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 600;
    line-height: 1.4;
    display: block;
}

.info-card-text a:hover {
    color: var(--color-secondary);
}

.contact-form-panel {
    background-color: var(--color-white);
    padding: 90px 60px;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.02);
}

.form-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 12px;
}

.form-title::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background-color: var(--color-secondary);
    bottom: 0;
    left: 0;
}

.quote-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

label {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 13px;
    color: var(--color-primary);
}

input[type="text"],
input[type="tel"],
input[type="email"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-body);
    font-size: 14px;
    background-color: var(--color-neutral-light);
    color: var(--color-primary);
    transition: var(--transition-smooth);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(255, 107, 0, 0.1);
}

textarea {
    resize: vertical;
}

.form-status-alert {
    padding: 15px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 600;
    margin-top: 15px;
}

.form-status-alert.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.form-status-alert.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 6. LAYOUT: FOOTER
   ========================================================================== */
.site-footer {
    background-color: #15181c;
    color: rgba(255, 255, 255, 0.7);
    padding-top: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.2fr;
    gap: 50px;
    padding-bottom: 60px;
}

.widget-title {
    color: var(--color-white);
    font-size: 18px;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.widget-title::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 2px;
    background-color: var(--color-secondary);
    bottom: 0;
    left: 0;
}

.company-full-name {
    color: var(--color-white);
    font-size: 14px;
    margin-bottom: 15px;
}

.company-details-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 14px;
}

.company-details-list li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.company-details-list i {
    color: var(--color-secondary);
    margin-top: 4px;
    width: 16px;
    text-align: center;
}

.company-details-list a:hover {
    color: var(--color-secondary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 14px;
}

.footer-links li a {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links li a i {
    font-size: 10px;
    opacity: 0.5;
    transition: var(--transition-smooth);
}

.footer-links li a:hover {
    color: var(--color-secondary);
    padding-left: 5px;
}

.footer-links li a:hover i {
    opacity: 1;
    color: var(--color-secondary);
}

.maps-wrapper {
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom {
    background-color: #0e1012;
    padding: 25px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 13px;
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

/* Floating Quick Call Button */
.quick-call-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: var(--color-secondary);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 5px 25px rgba(255, 107, 0, 0.5);
    z-index: 999;
    transition: var(--transition-smooth);
}

.quick-call-button:hover {
    background-color: var(--color-accent-hover);
    transform: scale(1.05);
}

.pulse-ring {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-secondary);
    border-radius: 50%;
    top: 0;
    left: 0;
    z-index: -1;
    animation: pulse 1.8s infinite;
}

/* Floating Quick Zalo Button */
.quick-zalo-button {
    position: fixed;
    bottom: 95px;
    right: 35px; /* Dịch vào một chút để căn thẳng tâm với nút gọi điện 60px (right 30px) */
    width: 50px;
    height: 50px;
    background-color: #0068ff;
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 25px rgba(0, 104, 255, 0.4);
    z-index: 999;
    transition: var(--transition-smooth);
}

.quick-zalo-button svg {
    width: 44px;
    height: 44px;
}

.quick-zalo-button:hover {
    background-color: #0056d6;
    transform: scale(1.05);
}

.pulse-ring-zalo {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid #0068ff;
    border-radius: 50%;
    top: 0;
    left: 0;
    z-index: -1;
    animation: pulse 1.8s infinite;
}

/* 7. INNER PAGES: STANDARD LAYOUT
   ========================================================================== */
.site-content-container {
    padding: 60px 0;
}

.page-header {
    margin-bottom: 40px;
    border-bottom: 1px solid var(--color-concrete);
    padding-bottom: 20px;
}

.page-title {
    font-size: 32px;
    font-weight: 800;
}

/* Blog Posts Grid */
.posts-list-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.post-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--box-shadow-subtle);
    border: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
}

.post-card:hover {
    box-shadow: var(--box-shadow-medium);
}

.post-card-image {
    height: 200px;
    overflow: hidden;
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.post-card:hover .post-card-image img {
    transform: scale(1.05);
}

.post-card-image-placeholder {
    height: 200px;
    background-color: var(--color-primary);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
}

.post-card-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.entry-meta {
    font-size: 12px;
    color: var(--color-neutral-grey);
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.entry-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.post-card h2.entry-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
}

.post-card h2.entry-title a:hover {
    color: var(--color-secondary);
}

.entry-summary {
    font-size: 14px;
    color: var(--color-neutral-grey);
    margin-bottom: 20px;
    flex-grow: 1;
}

.read-more-btn {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 14px;
    color: var(--color-secondary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.read-more-btn:hover {
    color: var(--color-primary);
}

/* Post Pagination */
.posts-navigation {
    margin-top: 50px;
    display: flex;
    justify-content: center;
}

.posts-navigation .nav-links {
    display: flex;
    gap: 15px;
}

.posts-navigation a, .posts-navigation span {
    padding: 10px 20px;
    background-color: var(--color-neutral-light);
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 14px;
}

.posts-navigation a:hover {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

/* Single Post & Page detail */
.single-post-layout, .page-layout {
    max-width: 800px;
    margin: 0 auto;
}

.single-post-article .entry-header {
    border-bottom: none;
    margin-bottom: 25px;
}

.single-post-title {
    font-size: 38px;
    font-weight: 800;
    margin-top: 15px;
}

.single-post-thumbnail {
    margin-bottom: 40px;
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.single-post-content, .entry-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-neutral-dark);
}

.single-post-content p, .entry-content p {
    margin-bottom: 25px;
}

.single-post-content h2, .entry-content h2 {
    font-size: 26px;
    margin: 40px 0 20px 0;
}

.single-post-content h3, .entry-content h3 {
    font-size: 20px;
    margin: 30px 0 15px 0;
}

.single-post-content blockquote {
    border-left: 4px solid var(--color-secondary);
    padding-left: 20px;
    font-style: italic;
    font-size: 18px;
    color: var(--color-primary);
    margin: 30px 0;
}

.tags-links {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--color-concrete);
    font-size: 14px;
    color: var(--color-neutral-grey);
}

.tags-links a {
    background-color: var(--color-neutral-light);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    margin-left: 5px;
}

.tags-links a:hover {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

/* 8. ANIMATIONS
   ========================================================================== */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translate(-50%, 0);
    }
    40% {
        transform: translate(-50%, -10px);
    }
    60% {
        transform: translate(-50%, -5px);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* 9. RESPONSIVE MEDIA QUERIES
   ========================================================================== */

/* Large Tablets & Small Desktops (992px - 1200px) */
@media (max-width: 1200px) {
    .container {
        padding: 0 30px;
    }
    .about-grid {
        gap: 40px;
    }
    .service-items-grid {
        gap: 20px;
    }
    .posts-list-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablets (768px - 991px) */
@media (max-width: 991px) {
    section {
        padding: 70px 0;
    }
    
    .header-cta .btn-phone {
        display: none; /* Ẩn bớt số điện thoại trên menu để trống chỗ */
    }
    
    .hero-title {
        font-size: 38px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .stat-card {
        border-left: none;
        background-color: rgba(255, 255, 255, 0.03);
        padding: 20px;
        border-radius: var(--border-radius-sm);
    }
    
    .service-items-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-img-large {
        height: 400px;
    }
    
    .process-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-timeline::after {
        display: none; /* Ẩn đường thẳng nối trên máy tính */
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info-panel {
        padding: 60px 40px;
    }
    
    .contact-form-panel {
        padding: 60px 40px;
    }
    
    .footer-container {
        grid-template-columns: 1.5fr 1fr;
    }
    
    .footer-maps {
        grid-column: span 2;
    }
}

/* Mobile Devices (max 767px) */
@media (max-width: 767px) {
    .top-bar {
        display: none; /* Ẩn topbar trên mobile để tối ưu màn hình */
    }
    
    .site-header {
        padding: 10px 0;
    }
    
    /* Mobile Menu */
    .menu-toggle {
        display: block;
        z-index: 1001;
    }
    
    .menu-main-container {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--color-white);
        padding: 100px 40px 40px 40px;
        box-shadow: -10px 0 35px rgba(0, 0, 0, 0.1);
        transition: var(--transition-smooth);
        z-index: 1000;
        border-left: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .menu-main-container.active {
        right: 0;
    }
    
    .menu-main-container ul.menu {
        flex-direction: column;
        gap: 20px;
    }
    
    .menu-main-container ul.menu li a {
        color: var(--color-primary);
        font-size: 18px;
    }
    
    .menu-toggle.active .icon-open {
        display: none;
    }
    
    .menu-toggle.active .icon-close {
        display: block;
        color: var(--color-primary);
    }
    
    .menu-toggle .icon-close {
        display: none;
    }
    
    .header-cta {
        display: none;
    }
    
    .hero-section {
        height: auto;
        padding: 120px 0 80px 0;
    }
    
    .hero-title {
        font-size: 30px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-maps {
        grid-column: span 1;
    }
    
    .footer-bottom-container {
        flex-direction: column;
        text-align: center;
    }
    
    .posts-list-grid {
        grid-template-columns: 1fr;
    }
    
    .single-post-title {
        font-size: 28px;
    }
    
    .quick-call-button {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .quick-zalo-button {
        bottom: 75px;
        right: 24px; /* Căn thẳng tâm với nút gọi điện 50px (right 20px) */
        width: 42px;
        height: 42px;
    }
    
    .quick-zalo-button svg {
        width: 36px;
        height: 36px;
    }
}