/* ============================
   SEE-N SOLAR SOLUTION
   Premium Design System
   ============================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Noto+Sans+Bengali:wght@400;500;600;700;800&display=swap');

/* CSS Variables */
:root {
    /* Palette */
    --primary-green: #6BCF3D;
    --deep-green: #0F2A1D;
    --solar-gold: #F5C542;
    --glow-yellow: #FFD966;
    --bg-dark: #050706;
    --bg-card: #0E1211;

    /* Gradients */
    --primary-gradient: linear-gradient(135deg, #1F7A3F 0%, #0B0F0E 100%);
    --gold-gradient: linear-gradient(90deg, #F5C542, #FFD966);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);

    /* Text */
    --text-white: #FFFFFF;
    --text-muted: #A0B0AA;

    /* Effects */
    --shadow-glow: 0 10px 40px -10px rgba(107, 207, 61, 0.3);
    --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; outline: none; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', 'Noto Sans Bengali', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-white);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
img { max-width: 100%; display: block; object-fit: cover; }

.logo-image {
    height: 90px !important;     /* এখানে 80px, 100px, 120px চেষ্টা করুন */
    width: auto !important;
    max-height: 120px;           /* খুব বড় হলে সীমা */
    object-fit: contain;
    display: block !important;
}

/* মোবাইলে ছোট রাখুন */
@media (max-width: 768px) {
    .logo-image {
        height: 80px !important;
        max-height: 90px;
    }
}



/* Utilities */
.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section-padding { padding: 100px 0; }
.text-center { text-align: center; }
.text-gold { color: var(--solar-gold); }
.text-green { color: var(--primary-green); }

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 15px;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: 'Noto Sans Bengali', sans-serif;
    letter-spacing: -1px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 50px auto;
}

/* ============================
   NAVIGATION
   ============================ */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(5, 7, 6, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 85px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}


.nav-menu {
    display: flex;
    gap: 35px;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
    position: relative;
}

.nav-link:hover, .nav-link.active { color: var(--text-white); }

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--primary-green);
    transition: 0.3s;
}

.nav-link:hover::after { width: 100%; }

.mobile-toggle {
    display: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--primary-green);
    background: none;
    border: none;
}

/* ============================
   HERO SECTION
   ============================ */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 70% 20%, rgba(107, 207, 61, 0.15), transparent 40%),
                linear-gradient(to bottom, var(--bg-dark), #0F2A1D);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: var(--primary-green);
    filter: blur(180px);
    opacity: 0.2;
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 750px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.hero h4 {
    color: var(--primary-green);
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 25px;
    font-family: 'Noto Sans Bengali', sans-serif;
    font-weight: 800;
    color: #fff;
}

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

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 0 20px rgba(31, 122, 63, 0.4);
    border: 1px solid rgba(107, 207, 61, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(107, 207, 61, 0.6);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--text-muted);
    color: var(--text-white);
}

.btn-outline:hover {
    border-color: var(--solar-gold);
    color: var(--solar-gold);
}

.hero-btns {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================
   ABOUT SECTION
   ============================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-img img {
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    width: 100%;
    height: auto;
}

.about-content h3 {
    color: var(--primary-green);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.about-content p {
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 30px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--glass-border);
}

.stat h2 {
    font-size: 2.5rem;
    color: var(--solar-gold);
    margin-bottom: 5px;
}

.stat p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ============================
   PROJECT SLIDER
   ============================ */
.projects-section {
    background: #000;
}

.project-slider {
    display: flex;
    overflow-x: auto;
    gap: 30px;
    padding-bottom: 40px;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
}

.project-slider::-webkit-scrollbar { display: none; }

.project-card {
    min-width: 350px;
    scroll-snap-align: center;
    position: relative;
    height: 300px;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(to top, #000 0%, transparent 100%);
    z-index: 2;
}

.project-tag {
    background: var(--solar-gold);
    color: #000;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-block;
    margin-bottom: 10px;
}

.project-overlay h3 {
    color: white;
    margin: 0 0 5px;
    font-size: 1.1rem;
}

.project-overlay p {
    color: #ccc;
    margin: 0;
    font-size: 0.9rem;
}

/* ============================
   SERVICES GRID
   ============================ */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.premium-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    transition: var(--transition);
}

.premium-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-green);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-title {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: #fff;
}

.card-desc {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* ============================
   PRODUCTS & PACKAGES
   ============================ */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 40px;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 50px;
    border: 1px solid rgba(255,255,255,0.1);
    background: transparent;
    color: #fff;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.category-tab:hover, .category-tab.active {
    background: linear-gradient(135deg, #1F7A3F, #0B0F0E);
    border-color: var(--primary-green);
}

.products-grid, .packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

/* Product Card */
.product-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 25px;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-green);
    box-shadow: var(--shadow-glow);
}

.product-card .card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.product-card .card-icon {
    font-size: 1.5rem;
    margin: 0;
}

.product-card .card-title {
    font-size: 1.1rem;
    margin: 0;
}

.product-specs {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 15px;
    line-height: 1.8;
}

.product-specs p {
    margin: 5px 0;
}

.product-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-top: 1px solid var(--glass-border);
    margin-bottom: 15px;
}

.price-label {
    color: var(--text-muted);
}

.price-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--solar-gold);
}

.order-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-gradient);
    border: 1px solid rgba(107, 207, 61, 0.3);
    border-radius: 8px;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.order-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(107, 207, 61, 0.4);
}

/* Package Card */
.package-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

.package-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-green);
    box-shadow: var(--shadow-glow);
}

.badge-popular {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: var(--solar-gold);
    color: #000;
    padding: 4px 15px;
    font-size: 0.75rem;
    font-weight: 800;
    border-radius: 0 0 10px 10px;
    z-index: 2;
}

.badge-deal {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    color: #000;
    padding: 4px 15px;
    font-size: 0.75rem;
    font-weight: 800;
    border-radius: 0 0 10px 10px;
    z-index: 2;
}

.package-header-strip {
    background: linear-gradient(90deg, #1F7A3F, #0B0F0E);
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid var(--glass-border);
}

.package-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.package-summary {
    color: var(--primary-green);
    font-size: 0.9rem;
    margin: 10px 0 0;
}

.package-content {
    padding: 25px;
}

.package-items {
    margin-bottom: 15px;
}

.package-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 8px;
    color: #ddd;
    font-size: 0.85rem;
    line-height: 1.4;
}

.check-icon {
    color: var(--solar-gold);
    flex-shrink: 0;
}

.spec-item {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 5px 0;
}

.suitable-for {
    color: var(--primary-green);
    font-size: 0.9rem;
    margin-top: 10px;
    font-weight: 500;
}

.package-price-area {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-top: 1px solid var(--glass-border);
    background: rgba(0,0,0,0.2);
}

.package-btn {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
}

.package-btn:hover {
    filter: brightness(1.1);
    transform: scale(1.05);
}

/* ============================
   CALCULATOR
   ============================ */
.calculator-section {
    background: radial-gradient(circle at top right, #0f2a1d, #050706);
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.selection-area {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 30px;
    backdrop-filter: blur(10px);
}

.input-group label {
    display: block;
    color: #aaa;
    margin-bottom: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.select-wrapper {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
}

.custom-select {
    flex: 1;
    background: #0a0a0a;
    color: #fff;
    border: 1px solid #333;
    padding: 15px;
    border-radius: 10px;
    font-size: 1rem;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 20 20'%3E%3Cpath fill='%236BCF3D' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px top 50%;
    background-size: 12px auto;
}

.custom-select:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 15px rgba(107, 207, 61, 0.2);
}

.add-btn {
    background: var(--primary-gradient);
    color: #fff;
    border: none;
    padding: 0 25px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: 0.3s;
}

.add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(107, 207, 61, 0.4);
}

.list-title {
    color: #fff;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 10px;
}

.devices-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 5px;
}

.device-tag {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 12px 15px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.device-info h5 {
    color: #fff;
    margin: 0;
    font-size: 1rem;
}

.device-info span {
    color: var(--solar-gold);
    font-size: 0.8rem;
}

.tag-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #000;
    padding: 4px;
    border-radius: 6px;
}

.mini-btn {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: none;
    background: #222;
    color: #fff;
    cursor: pointer;
    font-weight: bold;
}

.mini-btn:hover {
    background: var(--primary-green);
    color: #000;
}

.qty-display {
    min-width: 20px;
    text-align: center;
    font-weight: bold;
    color: #fff;
}

.empty-state {
    text-align: center;
    color: #555;
    padding: 30px;
    font-style: italic;
    border: 2px dashed rgba(255,255,255,0.05);
    border-radius: 10px;
}

/* Dashboard */
.dash-glass {
    background: rgba(20, 20, 20, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    position: sticky;
    top: 100px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.dash-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    color: #888;
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.pulse-dot {
    width: 10px;
    height: 10px;
    background: #ff3333;
    border-radius: 50%;
    box-shadow: 0 0 10px #ff3333;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 0.4; box-shadow: 0 0 0 0 rgba(255, 51, 51, 0.7); }
    70% { opacity: 1; box-shadow: 0 0 0 10px rgba(255, 51, 51, 0); }
    100% { opacity: 0.4; box-shadow: 0 0 0 0 rgba(255, 51, 51, 0); }
}

.total-watts-box {
    position: relative;
    margin-bottom: 20px;
    height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.glow-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(107, 207, 61, 0.2) 0%, rgba(0,0,0,0) 70%);
    z-index: 0;
    animation: breathe 3s infinite ease-in-out;
}

@keyframes breathe {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

.watt-value {
    position: relative;
    z-index: 2;
    font-size: 3.5rem;
    font-weight: 800;
    color: #fff;
}

.watt-unit {
    position: relative;
    z-index: 2;
    font-size: 0.9rem;
    color: #666;
    letter-spacing: 3px;
    margin-top: 5px;
}

.kw-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 25px;
    background: rgba(255,255,255,0.03);
    padding: 15px;
    border-radius: 12px;
}

.kv-item small {
    color: #777;
    display: block;
    margin-bottom: 5px;
}

.kv-item h2, .kv-item h4 {
    margin: 0;
    color: var(--solar-gold);
}

.rec-card {
    background: rgba(107, 207, 61, 0.1);
    border: 1px solid rgba(107, 207, 61, 0.3);
    padding: 15px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 15px;
    text-align: left;
    margin-bottom: 25px;
}

.rec-icon {
    font-size: 1.5rem;
}

.rec-text small {
    color: #aaa;
    font-size: 0.8rem;
}

.rec-text h5 {
    margin: 5px 0 0;
    color: #fff;
    font-size: 1.1rem;
}

.quote-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(45deg, var(--solar-gold), #b8860b);
    border: none;
    border-radius: 12px;
    color: #000;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 10px 20px rgba(245, 197, 66, 0.2);
}

.quote-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(245, 197, 66, 0.4);
}

/* ============================
   CONTACT
   ============================ */
.contact-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-details h3 {
    margin-bottom: 30px;
    font-size: 1.8rem;
    color: #fff;
}

.contact-info-box {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    background: rgba(107, 207, 61, 0.1);
    padding: 15px;
    border-radius: 50%;
    font-size: 1.5rem;
}

.contact-info-box h4 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.contact-info-box p {
    color: var(--text-muted);
}

.map-frame {
    width: 100%;
    height: 300px;
    border-radius: 12px;
    border: none;
    background: #222;
}

/* ============================
   FOOTER
   ============================ */
footer {
    background: #020202;
    padding: 80px 0 30px;
    border-top: 1px solid #111;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-col p, .footer-col a {
    color: var(--text-muted);
    display: block;
    margin-bottom: 10px;
    transition: 0.3s;
}

.footer-col a:hover {
    color: var(--primary-green);
    padding-left: 5px;
}

.footer-desc {
    color: var(--text-muted);
    line-height: 1.8;
    margin-top: 15px;
}

.footer-bottom {
    text-align: center;
    color: #555;
    border-top: 1px solid #111;
    padding-top: 30px;
}

/* ============================
   FLOATING WIDGETS
   ============================ */
.wa-float {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 28px;
    z-index: 997;
    box-shadow: 0 5px 20px rgba(37, 211, 102, 0.4);
    transition: 0.3s;
}

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

/* ============================
   CHATBOT
   ============================ */
#htc-embed-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #0f3d1f, #1f7a3a);
    border-radius: 50%;
    border: 2px solid #2ecc71;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    box-shadow: 0 8px 30px rgba(0,0,0,0.45);
    color: #ffffff;
    font-size: 24px;
}

#htc-embed-chat {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 380px;
    height: 560px;
    background: linear-gradient(180deg, #0b1f13, #102e1b);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    display: none;
    flex-direction: column;
    overflow: hidden;
    z-index: 99998;
    border: 1px solid rgba(46,204,113,0.25);
}

#htc-embed-chat.htc-open {
    display: flex;
}

.htc-embed-header {
    background: linear-gradient(180deg, #000000, #0a0a0a);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid rgba(34,197,94,0.25);
}

.htc-embed-logo {
    font-size: 2rem;
}

.htc-embed-header-text h3 {
    color: #ffffff;
    font-size: 16px;
    margin: 0;
}

.htc-embed-header-text p {
    color: rgba(255,255,255,0.85);
    font-size: 12px;
    margin: 2px 0 0;
}

.htc-embed-body {
    flex: 1;
    padding: 18px;
    background: linear-gradient(180deg, #0b1f13, #0f2a19);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.htc-embed-msg {
    max-width: 80%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.5;
}

.htc-embed-bot {
    background: rgba(34,197,94,0.15);
    color: #e6fff2;
    align-self: flex-start;
    border: 1px solid rgba(34,197,94,0.25);
}

.htc-embed-user {
    background: linear-gradient(135deg, #16a34a, #22c55e);
    color: #ffffff;
    align-self: flex-end;
}

.htc-embed-footer {
    padding: 12px;
    display: flex;
    gap: 8px;
    border-top: 1px solid rgba(46,204,113,0.2);
    background: #0b1f13;
}

#htc-embed-input {
    flex: 1;
    padding: 12px 14px;
    border-radius: 25px;
    border: 1px solid rgba(46,204,113,0.4);
    outline: none;
    background: #102e1b;
    color: #fff;
}

#htc-embed-input::placeholder {
    color: rgba(255,255,255,0.6);
}

.htc-embed-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    color: #fff;
    font-size: 18px;
}

#htc-embed-send {
    background: linear-gradient(135deg, #16a34a, #22c55e);
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 85px;
        left: 0;
        width: 100%;
        background: #050706;
        flex-direction: column;
        padding: 20px;
        text-align: center;
        border-bottom: 1px solid #333;
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .about-grid,
    .contact-wrapper,
    .footer-grid,
    .calculator-grid {
        grid-template-columns: 1fr;
    }

    #htc-embed-chat {
        width: 100%;
        height: 100vh;
        bottom: 0;
        right: 0;
        border-radius: 0;
    }

    .dash-glass {
        position: static;
        margin-top: 30px;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.85rem;
    }

    .category-tabs {
        flex-direction: column;
        align-items: center;
    }

    .category-tab {
        width: 100%;
        justify-content: center;
    }
}