/* ========================================
   Koinos - Website Styles
   Modern, colorful, professional consulting site
   ======================================== */

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

:root {
    --color-primary: #16233a;
    --color-accent: #2c6faa;
    --color-accent-hover: #1e5a8f;
    --color-teal: #17b7b0;
    --color-amber: #f2994a;
    --color-gold: #f2c94c;
    --color-purple: #7b61ff;
    --color-text: #2d3748;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-alt: #f4f8fc;
    --color-border: #e2e8f0;
    --gradient-brand: linear-gradient(120deg, #2c6faa 0%, #17b7b0 100%);
    --gradient-warm: linear-gradient(120deg, #f2994a 0%, #f2c94c 100%);
    --gradient-hero: linear-gradient(135deg, #12203a 0%, #1b3a5c 50%, #14494f 100%);
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --max-width: 1100px;
    --section-padding: 5.5rem 2rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 1rem;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    line-height: 1.3;
    color: var(--color-primary);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Gradient text accent used on section headings */
.services h2,
.experience h2,
.about h2,
.contact h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 0.6rem;
}

.services h2::after,
.experience h2::after,
.about h2::after,
.contact h2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 56px;
    height: 4px;
    border-radius: 2px;
    background: var(--gradient-brand);
}

.contact h2 { display: inline-block; }
.contact h2::after { left: 50%; transform: translateX(-50%); }

/* --- Header / Nav --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.nav-links a {
    position: relative;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--gradient-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
}

.nav-links a.active {
    color: var(--color-primary);
}

.nav-links a.active::after {
    transform: scaleX(1);
}

/* --- Hero --- */
.hero {
    position: relative;
    overflow: hidden;
    padding: 11rem 2rem 7rem;
    background: var(--gradient-hero);
    color: #fff;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse at 70% 40%, #000 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at 70% 40%, #000 0%, transparent 75%);
}

.hero-blob {
    position: absolute;
    width: 620px;
    height: 620px;
    opacity: 0.35;
    filter: blur(6px);
}

.hero-blob-1 {
    top: -160px;
    right: -120px;
    animation: float 14s ease-in-out infinite;
}

.hero-blob-2 {
    bottom: -220px;
    left: -160px;
    width: 500px;
    height: 500px;
    opacity: 0.28;
    animation: float 18s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-26px) scale(1.04); }
}

.hero-content {
    position: relative;
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 1.2rem;
    padding: 0.35rem 0.9rem;
    border: 1px solid rgba(242, 201, 76, 0.4);
    border-radius: 100px;
    background: rgba(242, 201, 76, 0.08);
}

.hero h1 {
    font-size: clamp(2.1rem, 5.5vw, 3.4rem);
    font-weight: 800;
    margin-bottom: 1.2rem;
    letter-spacing: -1px;
    color: #fff;
    max-width: 15ch;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.82);
    max-width: 620px;
    margin-bottom: 2.2rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.cta-button {
    display: inline-block;
    background: var(--gradient-warm);
    color: #1a1a1a;
    padding: 0.85rem 1.9rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: 0 8px 20px rgba(242, 153, 74, 0.3);
    transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.cta-button:hover {
    color: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(242, 153, 74, 0.4);
}

.cta-button-ghost {
    display: inline-block;
    padding: 0.85rem 1.9rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.35);
    transition: background 0.2s ease, border-color 0.2s ease;
}

.cta-button-ghost:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.6);
}

/* --- Services --- */
.services {
    padding: var(--section-padding);
    background:
        radial-gradient(circle at 12% 8%, rgba(23, 183, 176, 0.06), transparent 40%),
        radial-gradient(circle at 88% 90%, rgba(44, 111, 170, 0.06), transparent 40%);
}

.services h2 {
    font-size: 2.1rem;
    margin-bottom: 3rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.service-card {
    position: relative;
    padding: 2.2rem 2rem;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease;
}

.service-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--card-accent, var(--color-accent));
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: transparent;
    box-shadow: 0 16px 40px rgba(22, 35, 58, 0.12);
}

/* Per-card accent colors */
.service-card[data-accent="blue"]   { --card-accent: linear-gradient(90deg, #2c6faa, #4a9fd8); --icon-color: #2c6faa; --icon-bg: rgba(44,111,170,0.1); }
.service-card[data-accent="teal"]   { --card-accent: linear-gradient(90deg, #17b7b0, #4fd8c9); --icon-color: #12938d; --icon-bg: rgba(23,183,176,0.12); }
.service-card[data-accent="amber"]  { --card-accent: linear-gradient(90deg, #f2994a, #f2c94c); --icon-color: #d97b28; --icon-bg: rgba(242,153,74,0.13); }
.service-card[data-accent="purple"] { --card-accent: linear-gradient(90deg, #7b61ff, #a78bff); --icon-color: #6a4de0; --icon-bg: rgba(123,97,255,0.12); }

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.3rem;
    border-radius: 14px;
    background: var(--icon-bg, rgba(44,111,170,0.1));
    color: var(--icon-color, var(--color-accent));
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.65;
}

/* --- Experience --- */
.experience {
    position: relative;
    padding: 6.5rem 2rem 5.5rem;
    background: var(--gradient-hero);
    color: #fff;
}

.section-wave {
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    line-height: 0;
}

.section-wave svg {
    width: 100%;
    height: 70px;
    display: block;
}

.experience h2 {
    font-size: 2.1rem;
    margin-bottom: 2.5rem;
    color: #fff;
}

.experience h2::after { background: var(--gradient-warm); }

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3.5rem;
}

.stat {
    text-align: center;
    padding: 1.8rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    backdrop-filter: blur(4px);
}

.stat-number {
    display: block;
    font-size: 2.9rem;
    font-weight: 800;
    line-height: 1.1;
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    display: block;
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
}

.subsection-heading {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin-bottom: 1.2rem;
    margin-top: 2.5rem;
    color: var(--color-gold);
}

.client-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.client-tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 100px;
    padding: 0.45rem 1rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.client-tag:hover {
    background: rgba(23, 183, 176, 0.18);
    border-color: var(--color-teal);
    transform: translateY(-2px);
}

.cert-list {
    list-style: none;
    padding: 0;
}

.cert-list li {
    position: relative;
    padding: 0.55rem 0 0.55rem 1.6rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.cert-list li:last-child {
    border-bottom: none;
}

.cert-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.95rem;
    width: 9px;
    height: 9px;
    background: var(--gradient-warm);
    border-radius: 50%;
}

/* --- About --- */
.about {
    padding: var(--section-padding);
}

.about h2 {
    font-size: 2.1rem;
    margin-bottom: 2.2rem;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.2rem;
    color: var(--color-text);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.about-sidebar {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 1.8rem;
    border-top: 4px solid transparent;
    border-image: var(--gradient-brand) 1;
    border-image-slice: 1;
}

.about-sidebar h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.about-sidebar h4:first-child {
    margin-top: 0;
}

.about-sidebar ul {
    list-style: none;
    padding: 0;
}

.about-sidebar li {
    font-size: 0.9rem;
    color: var(--color-text);
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--color-border);
}

.about-sidebar li:last-child {
    border-bottom: none;
}

/* --- Contact --- */
.contact {
    position: relative;
    padding: var(--section-padding);
    text-align: center;
    color: #fff;
    background: var(--gradient-brand);
    overflow: hidden;
}

.contact::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(255,255,255,0.14), transparent 30%),
        radial-gradient(circle at 80% 80%, rgba(242,201,76,0.18), transparent 35%);
}

.contact .container { position: relative; }

.contact h2 {
    font-size: 2.1rem;
    margin-bottom: 1rem;
    color: #fff;
}

.contact h2::after { background: rgba(255,255,255,0.7); }

.contact-intro {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.contact-details {
    margin-top: 1rem;
}

.contact-link {
    display: inline-block;
    font-size: 1.15rem;
    font-weight: 700;
    color: #16233a;
    background: #fff;
    padding: 0.8rem 2rem;
    border-radius: 100px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.contact-link:hover {
    color: #16233a;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}

.contact-details {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.contact-details .contact-location {
    flex-basis: 100%;
}

.contact-link-linkedin {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: #fff;
    background: #0a66c2;
}

.contact-link-linkedin svg {
    width: 20px;
    height: 20px;
}

.contact-link-linkedin:hover {
    color: #fff;
}

.contact-location {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 1rem;
}

/* --- Footer --- */
.site-footer {
    padding: 2.2rem;
    text-align: center;
    background: var(--color-primary);
}

.site-footer p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* --- Scroll-reveal animations --- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

.reveal-stagger .service-card {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-stagger.is-visible .service-card {
    opacity: 1;
    transform: none;
}

.reveal-stagger.is-visible .service-card:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.is-visible .service-card:nth-child(2) { transition-delay: 0.15s; }
.reveal-stagger.is-visible .service-card:nth-child(3) { transition-delay: 0.25s; }
.reveal-stagger.is-visible .service-card:nth-child(4) { transition-delay: 0.35s; }

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 1.5rem;
    }

    .nav-links {
        gap: 1.2rem;
    }

    .hero {
        padding: 9rem 1.5rem 5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        gap: 0.75rem;
    }

    .hero h1 {
        font-size: 1.9rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .cta-button, .cta-button-ghost {
        text-align: center;
    }
}

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
    .hero-blob-1, .hero-blob-2 { animation: none; }
    html { scroll-behavior: auto; }
    .reveal,
    .reveal-stagger .service-card {
        opacity: 1;
        transform: none;
        transition: none;
    }
}