/* ====== Reset / Base ====== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #0f172a;
    background: #ffffff;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ====== Tokens ====== */
:root {
    --navy:      #1e3a8a;
    --navy-700:  #1e40af;
    --blue:      #2563eb;
    --blue-500:  #3b82f6;
    --blue-400:  #60a5fa;
    --sky:       #38bdf8;
    --bg-dark:   #0a0e27;
    --bg-mid:    #0f1738;
    --bg-tint:   #f3f6fd;
    --slate-700: #334155;
    --slate-500: #64748b;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.10);
    --shadow-xl: 0 24px 60px rgba(30, 58, 138, 0.18);
    --grad-blue: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
    --grad-text: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --grad-green: linear-gradient(135deg, #059669 0%, #10b981 100%);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ====== Utilities ====== */
.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.gradient-text.gradient-green {
    background: var(--grad-green);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ====== Buttons ====== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all .25s ease;
    white-space: nowrap;
}
.btn-primary {
    background: var(--grad-blue);
    color: #fff;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(37, 99, 235, 0.42); }
.btn-outline {
    background: transparent;
    color: var(--navy);
    border-color: var(--navy);
}
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; }
.btn-contact {
    color: var(--slate-700);
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    transition: background .2s ease, color .2s ease;
}
.btn-contact:hover { background: var(--bg-tint); color: var(--navy); }

/* ====== Navbar ====== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--slate-200);
}
.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 24px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-image { width: 36px; height: 36px; object-fit: contain; }
.logo-text {
    font-weight: 800;
    font-size: 22px;
    letter-spacing: -0.02em;
    color: var(--navy);
}
.logo-text-accent { color: var(--blue-500); }
.nav-menu {
    display: flex;
    gap: 28px;
}
.nav-menu a {
    color: var(--slate-700);
    font-weight: 500;
    font-size: 15px;
    transition: color .2s ease;
}
.nav-menu a:hover { color: var(--blue); }
.nav-buttons { display: flex; align-items: center; gap: 10px; }

@media (max-width: 960px) {
    .nav-menu { display: none; }
}

/* ====== Hero ====== */
.hero {
    position: relative;
    overflow: hidden;
    padding: 100px 0 80px;
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 80%);
}
.bg-waves {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.10), transparent 35%),
        radial-gradient(circle at 80% 20%, rgba(96, 165, 250, 0.12), transparent 40%),
        radial-gradient(circle at 60% 80%, rgba(30, 58, 138, 0.08), transparent 35%);
}
.hero-content {
    position: relative;
    text-align: center;
    max-width: 880px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-block;
    padding: 8px 18px;
    background: rgba(37, 99, 235, 0.08);
    color: var(--blue);
    font-weight: 600;
    font-size: 13px;
    border-radius: 999px;
    margin-bottom: 24px;
    border: 1px solid rgba(37, 99, 235, 0.16);
}
.hero-title {
    font-size: clamp(40px, 6vw, 68px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.025em;
    margin-bottom: 24px;
    color: var(--navy);
}
.hero-subtitle {
    font-size: 19px;
    color: var(--slate-500);
    margin-bottom: 36px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.hero-subtitle strong { color: var(--navy); font-weight: 600; }
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-bottom: 64px;
    flex-wrap: wrap;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 880px;
    margin: 0 auto;
}
.stat-item { text-align: center; }
.stat-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--navy);
    letter-spacing: -0.02em;
}
.stat-label { color: var(--slate-500); font-size: 14px; }
@media (max-width: 720px) {
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ====== Sections ====== */
.section { padding: 100px 0; }
.section-light { background: #ffffff; }
.section-tint { background: var(--bg-tint); }
.section-dark {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
    color: #e2e8f0;
}
.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 56px;
}
.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(37, 99, 235, 0.10);
    color: var(--blue);
    font-weight: 600;
    font-size: 13px;
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.tag-light {
    background: rgba(96, 165, 250, 0.16);
    color: #93c5fd;
}
.section-title {
    font-size: clamp(32px, 4.4vw, 48px);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--navy);
}
.section-title-light { color: #f8fafc; }
.section-subtitle {
    font-size: 17px;
    color: var(--slate-500);
    margin-top: 18px;
}
.section-subtitle-light { color: #cbd5e1; }

/* ====== Feature grid (Advertisers) ====== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.feature-card {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: 18px;
    padding: 32px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, 0.2);
}
.feature-icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(59,130,246,0.08));
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
    margin-bottom: 18px;
}
.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 10px;
}
.feature-card p { color: var(--slate-500); font-size: 15px; }
.card-tags {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin-top: 18px;
}
.card-tags span {
    padding: 4px 12px;
    background: var(--bg-tint);
    color: var(--blue);
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
}

/* ====== Publisher grid (dark section) ====== */
.pubgrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.pub-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 18px;
    padding: 32px;
    backdrop-filter: blur(8px);
    transition: transform .25s ease, border-color .25s ease, background .25s ease;
}
.pub-card:hover {
    transform: translateY(-4px);
    border-color: rgba(96, 165, 250, 0.4);
    background: rgba(255,255,255,0.06);
}
.pub-card h4 {
    font-size: 20px;
    font-weight: 700;
    color: #f8fafc;
    margin: 16px 0 8px;
}
.pub-card p { color: #94a3b8; font-size: 15px; }
.pub-icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
}
.icon-brand { background: linear-gradient(135deg, #1e3a8a, #2563eb); }
.icon-blue  { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.icon-green { background: linear-gradient(135deg, #059669, #10b981); }
.icon-orange{ background: linear-gradient(135deg, #ea580c, #f97316); }
.icon-pink  { background: linear-gradient(135deg, #db2777, #ec4899); }
.icon-amber { background: linear-gradient(135deg, #d97706, #f59e0b); }

/* ====== Solutions (Network) ====== */
.solutions-wrapper { display: flex; flex-direction: column; gap: 96px; }
.solution-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}
.solution-item.reverse > .solution-content { order: 2; }
.solution-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(37, 99, 235, 0.10);
    color: var(--blue);
    font-size: 12px;
    font-weight: 700;
    border-radius: 999px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.solution-content h2 {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 18px;
    line-height: 1.2;
}
.solution-content p {
    color: var(--slate-500);
    margin-bottom: 24px;
    font-size: 17px;
}
.solution-list { margin-bottom: 28px; }
.solution-list li {
    padding: 8px 0;
    color: var(--slate-700);
    font-size: 15px;
}
.solution-visual { position: relative; }
.visual-card {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: 22px;
    padding: 28px;
    box-shadow: var(--shadow-xl);
}
.visual-header {
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--slate-200);
}
.visual-metrics { display: flex; flex-direction: column; gap: 14px; }
.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--slate-500);
}
.metric-value { font-weight: 700; color: var(--navy); font-size: 17px; }
.metric-value.green { color: #059669; }
.visual-chart {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 120px;
    margin: 18px 0;
    padding: 12px 0;
}
.chart-bar {
    flex: 1;
    background: var(--grad-blue);
    border-radius: 6px 6px 0 0;
    min-height: 12px;
}
@media (max-width: 880px) {
    .solution-item { grid-template-columns: 1fr; gap: 36px; }
    .solution-item.reverse > .solution-content { order: 0; }
}

/* ====== Formats ====== */
.formats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 22px;
}
.format-card {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: 18px;
    padding: 28px;
    text-align: center;
    transition: transform .25s ease, box-shadow .25s ease;
}
.format-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.format-icon { font-size: 36px; margin-bottom: 14px; }
.format-card h4 { font-size: 18px; color: var(--navy); margin-bottom: 8px; font-weight: 700; }
.format-card p { color: var(--slate-500); font-size: 14px; }

/* ====== Timeline (Company) ====== */
.timeline {
    position: relative;
    max-width: 820px;
    margin: 0 auto;
    padding: 12px 0;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    left: 120px;
    width: 2px;
    background: linear-gradient(180deg, var(--blue-400), var(--blue));
}
.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 40px;
    padding: 18px 0 28px;
}
.timeline-year {
    font-weight: 800;
    font-size: 22px;
    color: var(--blue);
    text-align: right;
}
.timeline-body {
    position: relative;
    padding-left: 28px;
}
.timeline-body::before {
    content: '';
    position: absolute;
    top: 8px; left: -8px;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--grad-blue);
    box-shadow: 0 0 0 4px #fff, 0 0 0 6px rgba(37, 99, 235, 0.2);
}
.timeline-body h4 {
    font-size: 19px;
    color: var(--navy);
    margin-bottom: 6px;
    font-weight: 700;
}
.timeline-body p { color: var(--slate-500); font-size: 15px; }
@media (max-width: 640px) {
    .timeline::before { left: 70px; }
    .timeline-item { grid-template-columns: 70px 1fr; gap: 18px; }
    .timeline-year { font-size: 16px; }
}

/* ====== Stats Banner ====== */
.stats-banner {
    background: var(--grad-blue);
    color: #fff;
    padding: 64px 0;
}
.stats-banner-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.sb-value {
    font-size: 42px;
    font-weight: 800;
    letter-spacing: -0.02em;
}
.sb-label {
    font-size: 14px;
    opacity: 0.9;
    margin-top: 6px;
}
@media (max-width: 720px) {
    .stats-banner-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
}

/* ====== Partners ====== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 22px;
}
.partner-card {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: 18px;
    padding: 28px;
    display: flex;
    gap: 18px;
    transition: transform .25s ease, box-shadow .25s ease;
}
.partner-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.partner-icon {
    flex-shrink: 0;
    width: 52px; height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(37,99,235,0.10), rgba(59,130,246,0.05));
    display: flex; align-items: center; justify-content: center;
    font-size: 26px;
}
.partner-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 6px;
}
.partner-card p { color: var(--slate-500); font-size: 14px; margin-bottom: 12px; }
.link-arrow { color: var(--blue); font-weight: 600; font-size: 14px; }
.link-arrow:hover { color: var(--navy); }

/* ====== Contact ====== */
.contact {
    background: linear-gradient(180deg, #fff 0%, var(--bg-tint) 100%);
}
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}
.contact-info h2 {
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 16px;
}
.contact-info > p { color: var(--slate-500); font-size: 17px; margin-bottom: 36px; }
.contact-items { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.ci-icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(37,99,235,0.10), rgba(59,130,246,0.05));
    display: flex; align-items: center; justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}
.contact-item h4 { font-size: 15px; color: var(--navy); margin-bottom: 2px; }
.contact-item a { color: var(--blue); font-size: 15px; }
.contact-item p { color: var(--slate-500); font-size: 14px; }
.contact-form {
    background: #fff;
    border: 1px solid var(--slate-200);
    border-radius: 22px;
    padding: 36px;
    box-shadow: var(--shadow-md);
}
.contact-form h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 24px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: flex; flex-direction: column; margin-bottom: 18px; }
.form-field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: 6px;
}
.form-field input,
.form-field select,
.form-field textarea {
    padding: 12px 14px;
    border: 1.5px solid var(--slate-200);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    color: var(--navy);
    background: #fff;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.form-note { font-size: 14px; text-align: center; margin-top: 12px; }
.form-note.success { color: #059669; }
.form-note.error   { color: #dc2626; }
@media (max-width: 880px) {
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .form-row { grid-template-columns: 1fr; }
}

/* ====== Footer ====== */
.footer {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
    color: #94a3b8;
    padding: 72px 0 28px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.footer-logo {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 18px;
}
.footer-logo-full {
    width: 220px;
    height: auto;
    background: #fff;
    border-radius: 14px;
    padding: 14px 18px;
}
.footer-col > p { font-size: 14px; margin-bottom: 18px; }
.footer-contact-box {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 14px 16px;
}
.contact-label { font-size: 12px; color: #94a3b8; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 4px; }
.footer-email { color: var(--blue-400); font-weight: 600; font-size: 15px; }
.footer-col h4 {
    color: #f8fafc;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
}
.footer-col ul li { padding: 5px 0; }
.footer-col ul li a {
    color: #94a3b8;
    font-size: 14px;
    transition: color .2s ease;
}
.footer-col ul li a:hover { color: var(--blue-400); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 22px;
    text-align: center;
    font-size: 13px;
    color: #64748b;
}
@media (max-width: 880px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; }
}