:root {
    /* Colors */
    --primary-bg: #0A0D12;
    --darker-bg: #06080B;
    --text-main: #FFFFFF;
    --text-sec: #D8DCE2;
    --accent: #00B8FF;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.1);

    /* Typography — Sarabun added as fallback for Thai glyphs */
    --font-main: 'Pretendard', 'Sarabun', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--primary-bg);
    color: var(--text-main);
    font-family: var(--font-main);
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Typography Utilities */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-header h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, var(--text-sec));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-header p {
    color: var(--accent);
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.section {
    padding: 10rem 0;
    position: relative;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(10, 13, 18, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    color: #fff;
    display: flex;
    align-items: center;
}

.logo-img {
    height: 24px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-links a {
    color: var(--text-sec);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--accent);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.lang-btn {
    text-decoration: none;
    display: inline-block;
    background: none;
    border: none;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    color: var(--text-sec);
    font-family: var(--font-main);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    cursor: pointer;
    padding: 0.2rem 0.1rem;
    transition: color 0.2s;
}

.lang-btn:hover {
    color: var(--accent);
}

.lang-btn.active {
    color: var(--accent);
}

.lang-divider {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.75rem;
    user-select: none;
}

.btn-primary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 0.8rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: var(--accent);
    color: var(--primary-bg);
    box-shadow: 0 0 20px rgba(0, 184, 255, 0.4);
}

/* HERO SECTION */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.hero-bg img,
.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.filtered-hero {
    filter: brightness(0.5) contrast(1.1) grayscale(0.2);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(6, 8, 11, 0.3), var(--primary-bg));
}

.laser-line {
    position: absolute;
    top: 50%;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    box-shadow: 0 0 15px var(--accent);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: 5vw;
    line-height: 1.1;
    margin-bottom: 2rem;
}

.hero-title span {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-sec);
    font-weight: 300;
    opacity: 0;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    z-index: 2;
    opacity: 0;
}

.scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--text-sec);
}

.mouse {
    width: 24px;
    height: 36px;
    border: 2px solid var(--text-sec);
    border-radius: 12px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { transform: translate(-50%, 0); opacity: 1; }
    100% { transform: translate(-50%, 15px); opacity: 0; }
}

/* TECHNOLOGY SECTION */
.tech-section {
    background-color: var(--darker-bg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.tech-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 3rem 2rem;
    border-radius: 16px;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(50px);
}

.tech-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 184, 255, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

.tech-icon-wrapper {
    position: relative;
    width: 60px;
    height: 60px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--accent);
    filter: blur(20px);
    opacity: 0.2;
    transition: opacity 0.4s;
}

.tech-card:hover .tech-glow {
    opacity: 0.5;
}

.tech-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    z-index: 1;
}

.tech-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.tech-card p {
    color: var(--text-sec);
    font-size: 0.95rem;
}

/* FACILITY SECTION */
.facility-section {
    position: relative;
    padding: 15rem 0;
    margin-top: 6rem;
    display: flex;
    align-items: center;
}

.facility-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.facility-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(0.5);
}

.filtered-facility {
    filter: brightness(0.25) contrast(1.2) grayscale(0.6) sepia(0.5) hue-rotate(180deg);
}

.facility-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(to bottom, var(--primary-bg) 0%, transparent 18%, transparent 82%, var(--primary-bg) 100%),
        linear-gradient(to right,  var(--primary-bg) 10%, rgba(10, 13, 18, 0.6) 50%, var(--primary-bg) 90%);
}

.facility-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.stats-container {
    display: flex;
    justify-content: center;
    gap: 6rem;
    margin-top: 5rem;
}

.stat-item {
    text-align: center;
}

.stat-item h3 {
    font-size: 5rem;
    display: inline-block;
    color: var(--text-main);
}

.stat-item span {
    font-size: 3rem;
    color: var(--accent);
    font-weight: 700;
}

.stat-item p {
    color: var(--text-sec);
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    margin-top: 0.5rem;
}

/* PRODUCTS SECTION */
.products-section {
    background-color: var(--primary-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.product-card {
    background: var(--darker-bg);
    border-radius: 20px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border);
    transition: border-color 0.4s ease, transform 0.4s ease;
}

.product-card.no-img {
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(0,0,0,0) 100%), var(--darker-bg);
    position: relative;
}

.product-card.no-img:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 184, 255, 0.4);
}

.product-card:hover {
    border-color: rgba(0, 184, 255, 0.3);
}

.product-img {
    height: 300px;
    position: relative;
    overflow: hidden;
}

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

.hover-sweep {
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.1), transparent);
    transform: skewX(-20deg);
    transition: left 0.6s ease;
}

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

.product-card:hover .hover-sweep {
    left: 200%;
}

.product-info {
    padding: 2.5rem;
}

.product-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.product-info p {
    color: var(--text-sec);
}

/* QUALITY SECTION */
.quality-section {
    background-color: var(--darker-bg);
}

.quality-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.quality-text h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
}

.quality-text p {
    font-size: 1.2rem;
    color: var(--text-sec);
    margin-bottom: 3rem;
}

.cert-list {
    list-style: none;
}

.cert-list li {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cert-list span {
    color: var(--accent);
    font-weight: 800;
}

.quality-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pulse-ring {
    position: absolute;
    width: 100px;
    height: 100px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    animation: pulse 4s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

.delay-1 { animation-delay: 1s; }
.delay-2 { animation-delay: 2s; }

.center-dot {
    width: 20px;
    height: 20px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--accent);
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(5); opacity: 0; }
}

/* CONTACT SECTION */
.contact-section {
    background-color: var(--primary-bg);
}

.contact-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 24px;
    overflow: hidden;
}

.contact-info {
    padding: 5rem;
    background: rgba(0, 184, 255, 0.02);
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-info > p {
    color: var(--text-sec);
    margin-bottom: 4rem;
}

.info-item {
    margin-bottom: 2rem;
}

.info-item .label {
    display: block;
    color: var(--accent);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.info-item a, .info-item p {
    color: var(--text-main);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
}

/* 문의 접수 창구(이메일)를 시각적으로 먼저 보이게 한다 */
.info-item-primary {
    border-left: 3px solid var(--accent);
    padding-left: 1.1rem;
}

.info-item-primary a {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--accent);
}

.contact-form {
    padding: 5rem;
}

.input-group {
    position: relative;
    margin-bottom: 2.5rem;
}

.input-group input, .input-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
    color: #fff;
    font-size: 1.1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.3s;
}

.input-group label {
    position: absolute;
    top: 10px;
    left: 0;
    color: var(--text-sec);
    pointer-events: none;
    transition: all 0.3s ease;
}

.input-group input:focus, 
.input-group textarea:focus,
.input-group input:not(:placeholder-shown),
.input-group textarea:not(:placeholder-shown) {
    border-bottom-color: var(--accent);
}

.input-group input:focus + label,
.input-group textarea:focus + label,
.input-group input:not(:placeholder-shown) + label,
.input-group textarea:not(:placeholder-shown) + label {
    top: -20px;
    font-size: 0.8rem;
    color: var(--accent);
}

.btn-submit {
    background: var(--text-main);
    color: var(--primary-bg);
    border: none;
    padding: 1rem 3rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
}

.btn-submit:hover {
    background: var(--accent);
    box-shadow: 0 0 20px rgba(0, 184, 255, 0.4);
}

/* GREETING SECTION */
.greeting-section {
    background-color: var(--primary-bg);
}
.greeting-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: center;
}
.greeting-lead {
    font-size: 1.8rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
}
.greeting-desc {
    font-size: 1.1rem;
    color: var(--text-sec);
    margin-bottom: 2rem;
}
.ceo-sign {
    font-size: 1.2rem;
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
}
.greeting-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--border);
}
.stat-card .stat-label {
    display: block;
    color: var(--text-sec);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}
.stat-card .stat-val {
    font-size: 1.2rem;
    color: var(--text-main);
}

/* HISTORY SECTION */
.history-section {
    background-color: var(--darker-bg);
}

.timeline {
    position: relative;
    max-width: 860px;
    margin: 0 auto;
    padding: 0.5rem 0 2rem;
}

/* Vertical center spine */
.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg,
        transparent 0%,
        rgba(0, 184, 255, 0.28) 5%,
        rgba(0, 184, 255, 0.28) 95%,
        transparent 100%);
    transform: translateX(-50%);
}

.time-item {
    position: relative;
    width: 100%;
    display: flex;
    margin-bottom: 1.8rem;
    opacity: 0;
}

.time-item:nth-child(odd) {
    justify-content: flex-start;
    padding-right: calc(50% + 2.5rem);
    transform: translateX(-30px);
}

.time-item:nth-child(even) {
    justify-content: flex-end;
    padding-left: calc(50% + 2.5rem);
    transform: translateX(30px);
}

/* Horizontal connector to spine */
.time-item::before {
    content: '';
    position: absolute;
    top: calc(1.35rem + 5px);
    width: 2.5rem;
    height: 1px;
    background: rgba(0, 184, 255, 0.18);
    z-index: 1;
}

.time-item:nth-child(odd)::before {
    left: calc(50% - 2.5rem);
}

.time-item:nth-child(even)::before {
    left: 50%;
}

/* Center dot */
.time-item::after {
    content: '';
    position: absolute;
    left: calc(50% - 5px);
    top: 1.35rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 184, 255, 0.12), 0 0 12px rgba(0, 184, 255, 0.45);
    z-index: 2;
}

.time-card {
    position: relative;
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(0, 184, 255, 0.10);
    border-radius: 10px;
    padding: 1.4rem 1.6rem 1.8rem;
    overflow: hidden;
    transition: background 0.3s, border-color 0.3s;
}

.time-card:hover {
    background: rgba(0, 184, 255, 0.05);
    border-color: rgba(0, 184, 255, 0.28);
}

/* Giant ghost year */
.time-ghost {
    position: absolute;
    right: -0.3rem;
    bottom: -0.9rem;
    font-size: 5rem;
    font-weight: 900;
    color: rgba(0, 184, 255, 0.045);
    line-height: 1;
    pointer-events: none;
    user-select: none;
    letter-spacing: -0.03em;
}

/* Category tag */
.time-tag {
    display: inline-block;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 3px;
    margin-bottom: 0.65rem;
}

.tag-founding  { background: rgba(255,185,0,0.11);   color: #FFB900; border: 1px solid rgba(255,185,0,0.22); }
.tag-global    { background: rgba(140,110,255,0.11);  color: #9B82FF; border: 1px solid rgba(140,110,255,0.22); }
.tag-expansion { background: rgba(52,211,120,0.11);   color: #34D378; border: 1px solid rgba(52,211,120,0.22); }
.tag-partner   { background: rgba(0,184,255,0.09);    color: var(--accent); border: 1px solid rgba(0,184,255,0.2); }
.tag-digital   { background: rgba(255,110,60,0.11);   color: #FF7A50; border: 1px solid rgba(255,110,60,0.22); }

.time-year {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.02em;
    margin-bottom: 0.4rem;
    line-height: 1.1;
}

.time-desc {
    font-size: 0.92rem;
    color: var(--text-sec);
    line-height: 1.55;
    margin: 0;
}

/* CLIENTS SECTION */
.clients-section {
    background-color: var(--primary-bg);
}
.clients-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.client-logo-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}
.client-logo-box img {
    max-height: 40px;
    max-width: 150px;
    filter: grayscale(1) brightness(2);
    opacity: 0.5;
    transition: all 0.3s ease;
}
.client-logo-box:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 184, 255, 0.3);
}
.client-logo-box:hover img {
    filter: grayscale(0) brightness(1);
    opacity: 1;
}

/* MATERIALS SECTION */
.materials-section {
    background-color: var(--darker-bg);
}
.materials-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}
.material-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 3rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(30px);
}
.material-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
}
.mat-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}
.material-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}
.material-card p {
    color: var(--text-sec);
    font-size: 1rem;
}

/* CERTIFICATIONS SECTION */
.certifications-section {
    background-color: var(--darker-bg);
}
.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}
.cert-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
}
.cert-item:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 184, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 184, 255, 0.08);
}
.cert-img-wrapper {
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border);
    min-height: 200px;
}
.cert-img-wrapper img {
    max-width: 100%;
    max-height: 180px;
    object-fit: contain;
    border-radius: 8px;
}
.cert-info {
    padding: 2rem;
}
.cert-info h4 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}
.cert-sub {
    font-size: 0.9rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}
.cert-desc {
    color: var(--text-sec);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* CONFLICT MINERAL SECTION */
.conflict-mineral-section {
    background-color: var(--primary-bg);
}
.conflict-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 3rem;
    opacity: 0;
    transform: translateY(30px);
}
.conflict-img-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
}
.conflict-img-wrapper img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.conflict-img-wrapper img:hover {
    transform: scale(1.03);
}
.conflict-info h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}
.conflict-desc {
    color: var(--text-sec);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}
.conflict-list {
    list-style: none;
    padding: 0;
}
.conflict-list li {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--text-main);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    color: var(--text-sec);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .products-grid { grid-template-columns: 1fr; }
    .stats-container { flex-direction: column; gap: 3rem; }
    .greeting-grid { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: 1fr; }
    .conflict-content { grid-template-columns: 1fr; }
    .materials-grid { grid-template-columns: 1fr; }
    .clients-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero-title { font-size: 10vw; }
    .contact-box { grid-template-columns: 1fr; }
    .contact-info, .contact-form { padding: 3rem 2rem; }
    .nav-links { display: none; }
    .nav-right { gap: 0.8rem; }
    .btn-primary { padding: 0.6rem 1.2rem; font-size: 0.82rem; }
    .section { padding: 6rem 0; }
    .section-header h2 { font-size: 2rem; }
    .clients-grid { grid-template-columns: repeat(2, 1fr); }

    /* Timeline: collapse to single left-aligned column */
    .timeline::before { left: 1rem; transform: none; }
    .time-item:nth-child(odd),
    .time-item:nth-child(even) {
        justify-content: flex-start;
        padding-left: 2.8rem;
        padding-right: 0;
        transform: translateX(-20px);
    }
    .time-item::before { display: none; }
    .time-item::after  { left: 1rem; transform: translateX(-50%); }
}