/* =============================================
   FLAVOR SOLAR - Main Stylesheet
   Professional Solar Energy Theme
   ============================================= */

/* === CSS Variables === */
:root {
    --primary: #F59E0B;
    --primary-dark: #D97706;
    --primary-light: #FCD34D;
    --secondary: #1E3A5F;
    --secondary-dark: #0F2137;
    --accent: #10B981;
    --accent-light: #34D399;
    --dark: #111827;
    --gray-900: #1F2937;
    --gray-800: #374151;
    --gray-700: #4B5563;
    --gray-600: #6B7280;
    --gray-500: #9CA3AF;
    --gray-400: #D1D5DB;
    --gray-300: #E5E7EB;
    --gray-200: #F3F4F6;
    --gray-100: #F9FAFB;
    --white: #FFFFFF;
    --danger: #EF4444;
    --success: #10B981;
    --gradient-solar: linear-gradient(135deg, #F59E0B 0%, #EF4444 50%, #F59E0B 100%);
    --gradient-sky: linear-gradient(180deg, #1E3A5F 0%, #2563EB 100%);
    --gradient-green: linear-gradient(135deg, #10B981 0%, #059669 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Space Grotesk', 'Inter', sans-serif;
    --container: 1200px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-primary);
    color: var(--gray-800);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

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

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

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

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(245, 158, 11, 0.1);
    color: var(--primary-dark);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--secondary-dark);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-title span {
    background: var(--gradient-solar);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-transform: none;
    letter-spacing: 0;
}

.btn-primary {
    background: var(--gradient-solar);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--secondary-dark);
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary-dark);
    background: rgba(245, 158, 11, 0.05);
}

.btn-green {
    background: var(--gradient-green);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.1rem;
}

/* === TOP BAR === */
.top-bar {
    background: var(--secondary-dark);
    color: var(--gray-400);
    padding: 8px 0;
    font-size: 0.85rem;
}

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

.top-bar-left {
    display: flex;
    gap: 24px;
}

.top-bar-left a {
    color: var(--gray-400);
    display: flex;
    align-items: center;
    gap: 6px;
}

.top-bar-left a:hover {
    color: var(--primary);
}

.top-bar .social-links {
    display: flex;
    gap: 12px;
}

.top-bar .social-link {
    color: var(--gray-500);
    font-size: 0.9rem;
}

.top-bar .social-link:hover {
    color: var(--primary);
}

/* === HEADER / NAVBAR === */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.site-logo .logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-solar);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.4rem;
}

.site-logo .logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary-dark);
}

.site-logo .logo-text span {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-menu a {
    padding: 10px 18px;
    color: var(--gray-700);
    font-weight: 500;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-dark);
    background: rgba(245, 158, 11, 0.08);
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-dark);
    font-weight: 700;
    font-size: 1.05rem;
}

.nav-phone i {
    color: var(--accent);
    font-size: 1.2rem;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--secondary-dark);
    cursor: pointer;
}

/* === HERO === */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0F2137 0%, #1E3A5F 40%, #2563EB 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse-glow 4s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to bottom, transparent, var(--white));
    z-index: 2;
}

@keyframes pulse-glow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero .container {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content {
    color: var(--white);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(245, 158, 11, 0.2);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 50px;
    color: var(--primary-light);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title .highlight {
    background: var(--gradient-solar);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 520px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInRight 1s ease 0.4s both;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 550px;
}

.hero-image-wrapper img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.hero-float-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 3s ease-in-out infinite;
}

.hero-float-card.card-1 {
    bottom: 20%;
    left: -30px;
}

.hero-float-card.card-2 {
    top: 10%;
    right: -20px;
    animation-delay: 1.5s;
}

.hero-float-card .card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--white);
}

.hero-float-card .card-icon.green { background: var(--gradient-green); }
.hero-float-card .card-icon.solar { background: var(--gradient-solar); }

.hero-float-card .card-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--secondary-dark);
}

.hero-float-card .card-info p {
    font-size: 0.8rem;
    color: var(--gray-600);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

/* === STATS BAR === */
.stats-bar {
    padding: 0;
    margin-top: -60px;
    position: relative;
    z-index: 10;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.stat-item {
    padding: 40px 30px;
    text-align: center;
    border-right: 1px solid var(--gray-200);
    transition: var(--transition);
}

.stat-item:last-child {
    border-right: none;
}

.stat-item:hover {
    background: rgba(245, 158, 11, 0.03);
}

.stat-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-dark);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-number span {
    color: var(--primary);
}

.stat-label {
    font-size: 0.95rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* === ABOUT / WHY US === */
.about {
    background: var(--gray-100);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.about-image .experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--gradient-solar);
    color: var(--white);
    padding: 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.experience-badge .number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 32px;
}

.feature-card {
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-card .feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 12px;
    background: rgba(245, 158, 11, 0.1);
    color: var(--primary);
}

.feature-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--secondary-dark);
    margin-bottom: 6px;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.5;
}

/* === SERVICES === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.service-card .card-image {
    height: 220px;
    overflow: hidden;
    position: relative;
}

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

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

.service-card .card-image .card-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--gradient-solar);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.service-card .card-body {
    padding: 28px;
}

.service-card .card-body h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--secondary-dark);
    margin-bottom: 12px;
}

.service-card .card-body p {
    color: var(--gray-600);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-card .card-features {
    list-style: none;
    margin-bottom: 24px;
}

.service-card .card-features li {
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 8px;
}

.service-card .card-features li i {
    color: var(--accent);
    font-size: 0.8rem;
}

.service-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    font-weight: 600;
    font-size: 0.95rem;
}

.service-card .card-link:hover {
    gap: 12px;
}

/* === PROCESS / HOW IT WORKS === */
.process {
    background: var(--secondary-dark);
    color: var(--white);
}

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

.process .section-desc {
    color: rgba(255,255,255,0.7);
}

.process .section-badge {
    background: rgba(245, 158, 11, 0.2);
    color: var(--primary-light);
}

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

.process-steps::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 15%;
    right: 15%;
    height: 2px;
    background: rgba(245, 158, 11, 0.3);
}

.step-card {
    text-align: center;
    position: relative;
    z-index: 2;
}

.step-number {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient-solar);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--white);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}

.step-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-card p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* === PROJECTS / PORTFOLIO === */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.project-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 350px;
    cursor: pointer;
}

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

.project-card:hover img {
    transform: scale(1.1);
}

.project-card .project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--white);
    transform: translateY(30px);
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    transform: translateY(0);
    opacity: 1;
}

.project-overlay .project-type {
    font-size: 0.8rem;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.project-overlay h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.project-overlay p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
}

/* === TESTIMONIALS === */
.testimonials {
    background: var(--gray-100);
}

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

.testimonial-card {
    background: var(--white);
    padding: 36px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.testimonial-card .stars {
    color: var(--primary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.testimonial-card .quote {
    font-size: 1rem;
    color: var(--gray-700);
    line-height: 1.8;
    font-style: italic;
    margin-bottom: 24px;
    position: relative;
}

.testimonial-card .author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-card .author img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-card .author-info h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--secondary-dark);
}

.testimonial-card .author-info p {
    font-size: 0.8rem;
    color: var(--gray-600);
}

/* === FAQ === */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.faq-question {
    padding: 20px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: var(--secondary-dark);
    font-size: 1.05rem;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-dark);
}

.faq-question i {
    transition: var(--transition);
    color: var(--primary);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 28px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 28px 20px;
    max-height: 500px;
}

.faq-answer p {
    color: var(--gray-600);
    line-height: 1.8;
}

/* === CTA SECTION === */
.cta-section {
    background: var(--gradient-solar);
    padding: 80px 0;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.cta-section h2 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    position: relative;
    z-index: 2;
}

.cta-section p {
    font-size: 1.15rem;
    opacity: 0.9;
    margin-bottom: 32px;
    position: relative;
    z-index: 2;
}

.cta-section .btn {
    position: relative;
    z-index: 2;
    background: var(--white);
    color: var(--primary-dark);
    font-weight: 700;
}

.cta-section .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* === CONTACT === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-card {
    padding: 24px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    transition: var(--transition);
}

.contact-card:hover {
    background: rgba(245, 158, 11, 0.05);
}

.contact-card .card-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--gradient-solar);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.contact-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--secondary-dark);
    margin-bottom: 4px;
}

.contact-card p {
    font-size: 0.9rem;
    color: var(--gray-600);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-dark);
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--gray-100);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
    background: var(--white);
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.form-message {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    margin-top: 16px;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.form-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* === FOOTER === */
.site-footer {
    background: var(--secondary-dark);
    color: var(--gray-400);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-brand .logo-text span {
    color: var(--primary);
}

.footer-brand p {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient-solar);
    border-radius: 3px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: var(--gray-500);
    font-size: 0.95rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

/* === FLOATING ELEMENTS === */
.floating-cta {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.float-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.float-btn.zalo { background: #0068FF; }
.float-btn.phone { background: var(--accent); animation: phone-ring 2s infinite; }
.float-btn.scroll-top { background: var(--primary); display: none; }

@keyframes phone-ring {
    0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { box-shadow: 0 0 0 15px rgba(16, 185, 129, 0); }
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .hero .container { grid-template-columns: 1fr; text-align: center; }
    .hero-visual { display: none; }
    .hero-title { font-size: 2.8rem; }
    .hero-desc { margin: 0 auto 36px; }
    .hero-actions { justify-content: center; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .process-steps::before { display: none; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonials-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .top-bar { display: none; }
    .nav-menu { display: none; }
    .nav-cta .btn { display: none; }
    .mobile-toggle { display: block; }
    
    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        box-shadow: var(--shadow-lg);
        padding: 16px;
    }
    
    .hero { min-height: 70vh; }
    .hero-title { font-size: 2rem; }
    .hero-desc { font-size: 1rem; }
    .section { padding: 60px 0; }
    .section-title { font-size: 2rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-item { padding: 24px 16px; }
    .stat-number { font-size: 1.8rem; }
    .services-grid { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .contact-info-cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.7rem; }
    .hero-actions { flex-direction: column; }
    .stats-grid { grid-template-columns: 1fr; }
    .btn-lg { padding: 14px 28px; font-size: 1rem; }
}