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

:root {
    /* DARK MODE (Default) */
    --bg-body: #0b1120;
    --bg-header: rgba(11, 17, 32, 0.95);
    --bg-card: #151e32;
    --bg-card-hover: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #06b6d4;
    --accent-hover: #22d3ee;
    --accent-glow: rgba(6, 182, 212, 0.2);
    --border: #334155;
    --font-head: 'Rajdhani', sans-serif;
    --font-body: 'Roboto Mono', monospace;
    --toggle-icon: "☀";
}

[data-theme="light"] {
    /* LIGHT MODE Overrides */
    --bg-body: #f1f5f9;
    --bg-header: rgba(255, 255, 255, 0.95);
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent: #0891b2;
    --accent-hover: #06b6d4;
    --accent-glow: rgba(8, 145, 178, 0.15);
    --border: #e2e8f0;
    --toggle-icon: "☾";
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.3s;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.2s;
}

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

/* HEADER & NAV */
.main-header {
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 15px 0;
    backdrop-filter: blur(8px);
}

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

.logo a {
    font-family: var(--font-head);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-primary);
}

.highlight {
    color: var(--accent);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 30px;
}

/* NAVIGATION MENU */
.nav-menu a {
    font-size: 14px;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-secondary);
    position: relative;
    padding: 5px 0;
    margin: 0 10px;
    transition: color 0.3s;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--accent);
    transition: width 0.3s;
}

/* HOVER STATE */
.nav-menu a:hover {
    color: var(--text-primary);
}

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

/* ACTIVE STATE */
.nav-menu a.active {
    color: var(--text-primary);
}

.nav-menu a.active::after {
    width: 100%;
}

/* THEME SWITCHER */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    width: 36px;
    height: 36px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.theme-toggle::before {
    content: var(--toggle-icon);
}

/* MOBILE MENU BUTTON (Default Hidden) */
.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 20px;
    width: 36px;
    height: 36px;
    border-radius: 4px;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    line-height: 1;
}

.mobile-menu-btn:hover,
.mobile-menu-btn.active {
    border-color: var(--accent);
    color: var(--accent);
}

/* MAIN CONTENT & HERO */
main {
    flex: 1;
    padding: 40px 0;
}

.hero {
    padding: 80px 0;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: radial-gradient(circle at center, var(--bg-card) 0%, var(--bg-body) 100%);
}

.hero h1 {
    font-family: var(--font-head);
    font-size: 48px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.hero p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--accent);
    color: #fff;
    font-weight: 700;
    border-radius: 4px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    border: none;
    font-family: var(--font-body);
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* GRID & CARDS */
.grid-section {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 6px;
    transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    background-color: var(--bg-card-hover);
}

.card h3 {
    font-family: var(--font-head);
    font-size: 22px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 25px;
    flex-grow: 1;
}

.tag-container {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.tag {
    font-size: 11px;
    border: 1px solid var(--border);
    padding: 4px 8px;
    color: var(--accent);
    border-radius: 3px;
    background-color: rgba(125, 125, 125, 0.05);
}

.card-link {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    padding: 5px;
    align-self: flex-end;
    margin-top: auto; 
}

.card-link:hover {
    color: var(--accent-hover);
}

/* ABOUT PAGE STYLES */
.about-intro {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.industrial-list {
    padding-left: 20px;
    list-style: none;
    margin-top: 15px;
}

.industrial-list li {
    position: relative;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.industrial-list li::before {
    content: "■";
    color: var(--accent);
    position: absolute;
    left: -20px;
    top: 4px;
    font-size: 10px;
}

/* CONTACT PAGE STYLES */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 30px;
    margin-top: 20px;
}

.contact-info-card h3,
.contact-form-card h3 {
    margin-top: 0;
}

.contact-methods {
    margin-top: 25px;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: rgba(125, 125, 125, 0.05);
    margin-bottom: 15px;
    border-radius: 4px;
    border: 1px solid transparent;
    text-decoration: none;
    transition: all 0.2s;
}

.contact-item:hover {
    border-color: var(--accent);
    background: rgba(125, 125, 125, 0.1);
    transform: translateX(5px);
}

.contact-item .icon {
    font-size: 20px;
    color: var(--accent);
    margin-right: 15px;
    width: 30px;
    text-align: center;
    font-family: var(--font-body);
}

.contact-item .label {
    font-weight: bold;
    margin-right: 10px;
    font-size: 12px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.contact-item .value {
    color: var(--text-primary);
    font-family: var(--font-body);
}

/* FORM STYLES */
.industrial-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: flex;
    gap: 20px;
}

.input-field {
    background: var(--bg-body);
    border: 1px solid var(--border);
    padding: 12px 15px;
    color: var(--text-primary);
    font-family: var(--font-body);
    width: 100%;
    border-radius: 4px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-field:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.input-field::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.full-width {
    width: 100%;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.status-msg {
    font-size: 13px;
    font-weight: 600;
}

/* FOOTER */
.main-footer {
    border-top: 1px solid var(--border);
    background-color: var(--bg-body);
    padding: 30px 0;
    margin-top: auto;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-block h5 {
    color: var(--text-primary);
    margin-bottom: 2px;
    font-size: 14px;
    font-weight: 700;
    font-family: var(--font-head);
}

.footer-block p {
    font-size: 11px;
    color: var(--text-secondary);
    opacity: 0.8;
}

.footer-icons {
    display: flex;
    gap: 15px;
}

.footer-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    background-color: rgba(125, 125, 125, 0.05);
    border: 1px solid transparent;
    transition: all 0.2s;
    color: var(--text-secondary);
    text-decoration: none;
    font-family: var(--font-body); /* Ensures text icons align */
    font-weight: bold;
    font-size: 14px;
}

.footer-icons a:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* RESPONSIVE & MOBILE MENU */
@media (max-width: 768px) {
    /* Show Hamburger */
    .mobile-menu-btn { 
        display: flex; 
    }

    /* Hide Menu by Default */
    .nav-menu { 
        display: none; 
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-header);
        flex-direction: column;
        border-bottom: 1px solid var(--border);
        padding: 10px 0;
        backdrop-filter: blur(10px);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    }
    
    /* Active Class for Mobile Menu (Toggled by JS) */
    .nav-menu.active {
        display: flex;
        animation: slideDown 0.3s ease-out;
    }

    /* Mobile Link Styles */
    .nav-menu a {
        width: 100%;
        text-align: center;
        padding: 15px 0;
        margin: 0;
        border-bottom: 1px solid rgba(125,125,125,0.1);
    }
    
    .nav-menu a:last-child {
        border-bottom: none;
    }
    
    .nav-right {
        gap: 15px;
    }

    /* Grid Fixes */
    .grid-section { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { flex-direction: column; gap: 20px; }
}

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