/* ============================================================
   Elink Innovation — Main Stylesheet
   Color palette mirrors elinkworld.com theme
   Primary:   #ef8f21 (orange)
   Secondary: #0a8fc8 (blue)
   Dark nav:  #1a2535
   Body text: #243141
   ============================================================ */

:root {
    --color-primary:        #ef8f21;
    --color-primary-dark:   #cb7512;
    --color-secondary:      #0a8fc8;
    --color-secondary-dark: #0d729d;
    --color-dark:           #1a2535;
    --color-dark-mid:       #243141;
    --color-body:           #4a5568;
    --color-light:          #f5f7fa;
    --color-white:          #ffffff;
    --color-border:         #e2e8f0;
    --color-heading:        #1a2535;
    --font-main:            'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --radius:               6px;
    --radius-lg:            12px;
    --shadow-sm:            0 1px 3px rgba(0,0,0,.08);
    --shadow-md:            0 4px 20px rgba(0,0,0,.10);
    --shadow-lg:            0 10px 40px rgba(0,0,0,.14);
    --transition:           all .25s ease;
}

/* ---- Reset / Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-main);
    color: var(--color-body);
    font-size: 16px;
    line-height: 1.7;
    background: var(--color-white);
}

img { max-width: 100%; display: block; }
a   { color: var(--color-secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary); }
ul  { list-style: none; }

h1, h2, h3, h4, h5 {
    font-family: var(--font-main);
    color: var(--color-heading);
    font-weight: 700;
    line-height: 1.25;
}
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: 1.1rem; }

p { margin-bottom: 1rem; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ---- Buttons --------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: .95rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1;
}
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239,143,33,.35);
}
.btn-secondary {
    background: var(--color-secondary);
    color: var(--color-white);
}
.btn-secondary:hover {
    background: var(--color-secondary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(10,143,200,.3);
}
.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}
.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-dark);
    transform: translateY(-2px);
}
.btn-outline-dark {
    background: transparent;
    color: var(--color-secondary);
    border: 2px solid var(--color-secondary);
}
.btn-outline-dark:hover {
    background: var(--color-secondary);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ---- Section Utilities ------------------------------------ */
.section { padding: 5rem 0; }
.section-alt { background: var(--color-light); }
.section-dark {
    background: var(--color-dark);
    color: #cbd5e0;
}
.section-dark h2, .section-dark h3 { color: var(--color-white); }

.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 { margin-bottom: .75rem; }
.section-header p { color: var(--color-body); max-width: 620px; margin: 0 auto; font-size: 1.05rem; }
.section-header .underline {
    width: 60px; height: 4px;
    background: var(--color-primary);
    border-radius: 2px;
    margin: 1rem auto 0;
}

/* ---- Header / Nav ----------------------------------------- */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: var(--color-dark);
    transition: var(--transition);
}
.site-header.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,.3);
    background: rgba(26,37,53,.97);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo-link { text-decoration: none; }
.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -.5px;
}
.logo-e   { color: var(--color-primary); }
.logo-dot { color: #7a8ea8; }

.site-nav ul {
    display: flex;
    gap: .25rem;
    align-items: center;
}
.site-nav a {
    display: block;
    padding: .5rem .9rem;
    color: #cbd5e0;
    font-weight: 500;
    font-size: .95rem;
    border-radius: var(--radius);
    transition: var(--transition);
    text-decoration: none;
}
.site-nav a:hover, .site-nav a.active {
    color: var(--color-primary);
    background: rgba(239,143,33,.08);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: .5rem;
}
.nav-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .site-nav {
        display: none;
        position: absolute;
        top: 72px; left: 0; right: 0;
        background: var(--color-dark);
        padding: 1rem 1.5rem 1.5rem;
        border-top: 1px solid rgba(255,255,255,.08);
    }
    .site-nav.open { display: block; }
    .site-nav ul { flex-direction: column; gap: .25rem; }
}

/* ---- Hero ------------------------------------------------- */
.hero {
    background: linear-gradient(135deg, #1a2535 0%, #0d2140 60%, #0f3155 100%);
    color: var(--color-white);
    padding: 9rem 0 6rem;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -100px; right: -100px;
    width: 500px; height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(239,143,33,.15) 0%, transparent 70%);
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -80px; left: -80px;
    width: 400px; height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(10,143,200,.12) 0%, transparent 70%);
    pointer-events: none;
}
.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 760px;
}
.hero-badge {
    display: inline-block;
    background: rgba(239,143,33,.15);
    border: 1px solid rgba(239,143,33,.3);
    color: var(--color-primary);
    font-size: .82rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    padding: .35rem 1rem;
    border-radius: 20px;
    margin-bottom: 1.5rem;
}
.hero h1 {
    color: var(--color-white);
    margin-bottom: 1.25rem;
}
.hero h1 span { color: var(--color-primary); }
.hero p {
    font-size: 1.15rem;
    color: #a0aec0;
    margin-bottom: 2rem;
    max-width: 600px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---- Stats bar -------------------------------------------- */
.stats-bar {
    background: var(--color-secondary);
    padding: 1.5rem 0;
}
.stats-bar .container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    text-align: center;
}
.stat-item h3 {
    color: var(--color-white);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: .2rem;
}
.stat-item p {
    color: rgba(255,255,255,.75);
    font-size: .85rem;
    margin: 0;
    font-weight: 500;
}
@media (max-width: 600px) {
    .stats-bar .container { grid-template-columns: repeat(2,1fr); }
}

/* ---- Service Cards ---------------------------------------- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
}
.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
    width: 56px; height: 56px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(239,143,33,.12), rgba(10,143,200,.12));
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 1.25rem;
    font-size: 1.5rem;
    color: var(--color-primary);
}
.service-card h3 { margin-bottom: .6rem; font-size: 1.15rem; }
.service-card p { color: var(--color-body); font-size: .95rem; margin: 0; }

/* ---- Feature Two-col ------------------------------------- */
.feature-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.feature-split.reverse .feature-content { order: 2; }
.feature-split.reverse .feature-visual  { order: 1; }

.feature-label {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 700;
    font-size: .85rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: .75rem;
}
.feature-content h2 { margin-bottom: 1rem; }
.feature-content p  { margin-bottom: 1.25rem; }

.feature-visual {
    background: linear-gradient(135deg, var(--color-secondary-dark), var(--color-dark));
    border-radius: var(--radius-lg);
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 2.5rem;
}
.feature-visual-logo img {
    max-width: 220px;
    filter: drop-shadow(0 8px 24px rgba(0,0,0,.5));
}
.feature-visual::before {
    content: '';
    position: absolute;
    top: -60px; right: -60px;
    width: 220px; height: 220px;
    border-radius: 50%;
    background: rgba(239,143,33,.12);
}

.check-list { display: flex; flex-direction: column; gap: .6rem; margin-bottom: 1.5rem; }
.check-list li {
    display: flex;
    gap: .7rem;
    align-items: flex-start;
    font-size: .97rem;
}
.check-list li i { color: var(--color-primary); margin-top: 3px; flex-shrink: 0; }

@media (max-width: 900px) {
    .feature-split { grid-template-columns: 1fr; gap: 2.5rem; }
    .feature-split.reverse .feature-content,
    .feature-split.reverse .feature-visual { order: unset; }
}

/* ---- Domain showcase -------------------------------------- */
.domain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}
.domain-pill {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    padding: .85rem 1.5rem;
    display: flex;
    align-items: center;
    gap: .75rem;
    transition: var(--transition);
    font-weight: 600;
    color: var(--color-dark-mid);
}
.domain-pill i { color: var(--color-secondary); }
.domain-pill:hover {
    border-color: var(--color-secondary);
    background: rgba(10,143,200,.05);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ---- CTA Banner ------------------------------------------- */
.cta-banner {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: 5rem 0;
    text-align: center;
}
.cta-banner h2 { color: var(--color-white); margin-bottom: 1rem; }
.cta-banner p  { color: rgba(255,255,255,.85); font-size: 1.1rem; max-width: 560px; margin: 0 auto 2rem; }
.cta-banner .cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ---- Page Banner (inner pages) ----------------------------- */
.page-banner {
    background: linear-gradient(135deg, #1a2535 0%, #0d2140 100%);
    padding: 7rem 0 4rem;
    text-align: center;
}
.page-banner h1  { color: var(--color-white); margin-bottom: .75rem; }
.page-banner p   { color: #a0aec0; font-size: 1.1rem; max-width: 580px; margin: 0 auto; }
.breadcrumb {
    display: flex;
    justify-content: center;
    gap: .5rem;
    margin-bottom: 1rem;
    font-size: .88rem;
    color: #7a8ea8;
}
.breadcrumb a { color: var(--color-primary); }

/* ---- Team / About cards ----------------------------------- */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.75rem;
}
.value-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
    border-radius: var(--radius-lg);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.value-icon {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto 1.25rem;
}
.value-card h3 { margin-bottom: .6rem; font-size: 1.05rem; }
.value-card p  { font-size: .93rem; color: var(--color-body); margin: 0; }

/* ---- Contact Form ----------------------------------------- */
.contact-layout {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}
.form-group { margin-bottom: 1.25rem; }
.form-group label {
    display: block;
    font-weight: 600;
    font-size: .9rem;
    margin-bottom: .4rem;
    color: var(--color-dark-mid);
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: .75rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-main);
    font-size: .97rem;
    color: var(--color-dark-mid);
    background: var(--color-white);
    transition: var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(10,143,200,.12);
}
.form-group textarea { resize: vertical; min-height: 140px; }

.contact-info h3 { margin-bottom: 1.25rem; }
.contact-info-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
}
.contact-info-item .icon-wrap {
    width: 44px; height: 44px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(239,143,33,.12), rgba(10,143,200,.12));
    display: flex; align-items: center; justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}
.contact-info-item p { margin: 0; font-size: .95rem; }
.contact-info-item strong { display: block; color: var(--color-dark-mid); }

@media (max-width: 900px) {
    .contact-layout { grid-template-columns: 1fr; }
}

/* ---- Footer ----------------------------------------------- */
.site-footer { background: var(--color-dark); color: #a0aec0; }
.footer-top { padding: 4rem 0 3rem; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr 1.5fr;
    gap: 2.5rem;
}
.footer-col h4 {
    color: var(--color-white);
    font-size: .95rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    margin-bottom: 1.1rem;
}
.footer-col ul li { margin-bottom: .5rem; }
.footer-col ul a {
    color: #a0aec0;
    font-size: .93rem;
    transition: var(--transition);
}
.footer-col ul a:hover { color: var(--color-primary); }

.footer-logo .logo-text { font-size: 1.4rem; }
.footer-about { font-size: .9rem; margin: .85rem 0 1.25rem; color: #718096; line-height: 1.6; }
.footer-social { display: flex; gap: .6rem; }
.footer-social a {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,.07);
    color: #a0aec0;
    display: flex; align-items: center; justify-content: center;
    font-size: .85rem;
    transition: var(--transition);
}
.footer-social a:hover {
    background: var(--color-primary);
    color: var(--color-white);
}
.footer-subsidiary {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255,255,255,.07);
}
.subsidiary-label { font-size: .78rem; color: #718096; margin-bottom: .6rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; }
.footer-elinkworld-logo { max-width: 140px; opacity: .85; transition: var(--transition); }
.footer-elinkworld-logo:hover { opacity: 1; }

address { font-style: normal; }
address p { display: flex; gap: .75rem; align-items: flex-start; font-size: .92rem; margin-bottom: .85rem; }
address i { color: var(--color-primary); margin-top: 3px; flex-shrink: 0; }
address a { color: #a0aec0; }
address a:hover { color: var(--color-primary); }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.07);
    padding: 1.25rem 0;
    text-align: center;
}
.footer-bottom p { font-size: .82rem; color: #718096; margin: 0; }

@media (max-width: 900px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
    .footer-grid { grid-template-columns: 1fr; }
}

/* ---- Back to top ------------------------------------------ */
.back-to-top {
    position: fixed;
    bottom: 2rem; right: 2rem;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    display: flex; align-items: center; justify-content: center;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(239,143,33,.4);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-dark); }

/* ---- Utility ---------------------------------------------- */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }