/* ============================================
   FRANK GÄRTNER — HIGH-END CONSULTING WEBSITE
   ============================================ */

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

:root {
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-secondary: #5A5A5A;
    --color-text-muted: #8A8A8A;
    --color-accent: #1B3A4B;
    --color-accent-light: #2A5A72;
    --color-gold: #B8860B;
    --color-border: #E8E8E8;
    --color-border-light: #F0F0F0;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --container: 1200px;
    --section-padding: 140px;
    --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 40px;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* --- Typography --- */
.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 20px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 48px;
}

.section { padding: var(--section-padding) 0; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    padding: 16px 36px;
    border-radius: 0;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-text);
}
.btn-outline:hover {
    background: var(--color-text);
    color: #fff;
}

.btn-lg { padding: 20px 48px; font-size: 1rem; }

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 24px 0;
    transition: all 0.4s ease;
}

.nav.scrolled {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    padding: 16px 0;
    box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: #fff;
    transition: color var(--transition);
}
.nav.scrolled .nav-logo { color: var(--color-text); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    color: rgba(255,255,255,0.8);
    transition: color var(--transition);
}
.nav-links a:hover { color: #fff; }
.nav.scrolled .nav-links a { color: var(--color-text-secondary); }
.nav.scrolled .nav-links a:hover { color: var(--color-text); }

.nav-cta {
    padding: 10px 24px !important;
    border: 1px solid rgba(255,255,255,0.4) !important;
    transition: all var(--transition) !important;
}
.nav-cta:hover { background: rgba(255,255,255,0.1) !important; }
.nav.scrolled .nav-cta {
    border-color: var(--color-text) !important;
    color: var(--color-text) !important;
}
.nav.scrolled .nav-cta:hover {
    background: var(--color-text) !important;
    color: #fff !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: all var(--transition);
}
.nav.scrolled .nav-toggle span { background: var(--color-text); }

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, #0F2027 0%, #1B3A4B 40%, #2A5A72 100%);
    z-index: 0;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(184, 134, 11, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(42, 90, 114, 0.15) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 0 40px;
    max-width: 900px;
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 24px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 7vw, 5.5rem);
    font-weight: 400;
    line-height: 1.05;
    color: #fff;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
    margin-bottom: 36px;
}

.hero-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.04em;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-divider {
    width: 32px;
    height: 1px;
    background: rgba(255,255,255,0.2);
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-actions .btn-primary {
    background: var(--color-gold);
    color: #fff;
}
.hero-actions .btn-primary:hover {
    background: #D4A017;
}

.hero-actions .btn-outline {
    color: rgba(255,255,255,0.8);
    border-color: rgba(255,255,255,0.3);
}
.hero-actions .btn-outline:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border-color: rgba(255,255,255,0.6);
}

.hero-badges {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 28px;
}
.hero-badge {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 8px 20px;
    border: 1px solid rgba(184, 134, 11, 0.4);
    color: var(--color-gold);
    background: rgba(184, 134, 11, 0.08);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    z-index: 1;
}
.hero-scroll span {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.3);
}
.hero-scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.3), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(1); }
    50% { opacity: 1; transform: scaleY(1.2); }
}

/* --- About --- */
.about { background: var(--color-surface); }

.section-grid {
    display: grid;
    gap: 80px;
}

.about-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
}

.about-text {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-credentials {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.credential-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 10px;
}

.credential-value {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.stat-card {
    background: var(--color-bg);
    padding: 40px 32px;
    text-align: center;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}
.stat-card:hover {
    border-color: var(--color-border);
    transform: translateY(-2px);
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 500;
    color: var(--color-accent);
    line-height: 1;
    display: inline;
}
.stat-suffix {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-gold);
}

.stat-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: 12px;
    letter-spacing: 0.02em;
}

/* --- Credentials --- */
.credentials { background: var(--color-bg); }

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.credential-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    transition: all 0.4s ease;
    text-decoration: none;
    color: inherit;
}
.credential-card:hover {
    border-color: var(--color-border);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
}

.credential-card.credential-featured {
    grid-column: span 2;
    padding: 28px 32px;
    border-color: rgba(184, 134, 11, 0.2);
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(184, 134, 11, 0.03) 100%);
}
.credential-card.credential-featured:hover {
    border-color: var(--color-gold);
}

.credential-badge { flex-shrink: 0; }

.badge-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    line-height: 1.1;
    color: #fff;
}
.badge-icon span {
    font-size: 0.5rem;
    font-weight: 500;
    opacity: 0.8;
    letter-spacing: 0.06em;
    margin-top: 1px;
}

.credential-featured .badge-icon {
    width: 64px;
    height: 64px;
    font-size: 0.8125rem;
}

.badge-spc { background: linear-gradient(135deg, #1B3A4B, #2A5A72); }
.badge-ai-spc { background: linear-gradient(135deg, #1B3A4B, #4A8A6A); }
.badge-train { background: linear-gradient(135deg, #8B6914, #B8860B); }
.badge-scrum { background: linear-gradient(135deg, #0D6986, #1A8AAF); }
.badge-ai { background: linear-gradient(135deg, #3A4B6B, #5A72A0); }
.badge-flow { background: linear-gradient(135deg, #2A6B5A, #3A8A72); }

.credential-info h3 {
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 4px;
    color: var(--color-text);
}

.credential-featured .credential-info h3 {
    font-size: 0.9375rem;
}

.credential-issuer {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

.credentials-footer {
    text-align: center;
    margin-top: 36px;
}
.credentials-footer a {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gold);
    letter-spacing: 0.03em;
    transition: opacity var(--transition);
}
.credentials-footer a:hover { opacity: 0.7; }

/* --- Services --- */
.services { background: var(--color-bg); }

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--color-surface);
    padding: 48px 40px;
    border: 1px solid var(--color-border-light);
    transition: all 0.4s ease;
    position: relative;
}
.service-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 0; height: 2px;
    background: var(--color-gold);
    transition: width 0.5s ease;
}
.service-card:hover::before { width: 100%; }
.service-card:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.06);
}

.service-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 28px;
    color: var(--color-accent);
}
.service-icon svg { width: 100%; height: 100%; }

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 16px;
    line-height: 1.3;
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.service-tags li {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    padding: 6px 14px;
    background: var(--color-bg);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border-light);
}

/* --- Track Record --- */
.track-record { background: var(--color-surface); }

.timeline { max-width: 880px; }

.timeline-item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 40px;
    padding: 40px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.timeline-item:last-child { border-bottom: none; }

.timeline-date {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-accent);
    padding-top: 4px;
}

.timeline-card { }

.timeline-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 12px;
}

.timeline-role {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.timeline-industry {
    font-size: 0.8125rem;
    color: var(--color-gold);
    font-weight: 500;
}

.timeline-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* --- Expertise --- */
.expertise { background: var(--color-bg); }

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
}

.expertise-col h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--color-accent);
}

.expertise-col li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.expertise-col li:last-child { border-bottom: none; }

/* --- References --- */
.references {
    background: var(--color-accent);
    text-align: center;
}
.references .section-label { color: var(--color-gold); }

.quote-block {
    max-width: 800px;
    margin: 0 auto;
}

.quote-block blockquote {
    font-family: var(--font-serif);
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    font-style: italic;
    line-height: 1.6;
    color: rgba(255,255,255,0.9);
    margin-bottom: 32px;
}

.quote-block cite {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-style: normal;
    font-weight: 500;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.04em;
}

/* --- Contact --- */
.contact {
    background: var(--color-surface);
    text-align: center;
}

.contact-inner { max-width: 640px; margin: 0 auto; }

.contact-text {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.contact-actions { margin-bottom: 32px; }

.contact-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}
.contact-divider {
    width: 24px;
    height: 1px;
    background: var(--color-border);
}

/* --- Footer --- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}

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

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* --- SAFe Philosophy --- */
.safe-philosophy { background: var(--color-bg); }

.philosophy-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 64px;
    align-items: start;
}

.philosophy-text {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.philosophy-levels { display: flex; flex-direction: column; gap: 24px; }

.level-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 20px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}
.level-item:hover {
    border-color: var(--color-border);
    transform: translateX(4px);
}

.level-number {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-gold);
    line-height: 1;
    min-width: 36px;
    padding-top: 2px;
}

.level-item strong {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.level-item p {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
}

.philosophy-sidebar { display: flex; flex-direction: column; gap: 24px; }

.philosophy-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
}
.philosophy-card.highlight {
    background: var(--color-accent);
    border-color: var(--color-accent);
}
.philosophy-card.highlight h4,
.philosophy-card.highlight p { color: rgba(255,255,255,0.9); }
.philosophy-card.highlight h4 { color: #fff; }

.philosophy-card h4 {
    font-family: var(--font-serif);
    font-size: 1.0625rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.philosophy-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.philosophy-link {
    display: inline-block;
    margin-top: 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gold) !important;
    letter-spacing: 0.04em;
    transition: opacity var(--transition);
}
.philosophy-link:hover { opacity: 0.8; }

/* --- Research --- */
.research { background: var(--color-surface); }

.research-grid { }

.research-content { margin-bottom: 16px; }

.research-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.research-card {
    padding: 40px;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    transition: all 0.4s ease;
    position: relative;
}
.research-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0;
    width: 3px; height: 0;
    background: var(--color-gold);
    transition: height 0.5s ease;
}
.research-card:hover::before { height: 100%; }
.research-card:hover {
    border-color: var(--color-border);
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.05);
}

.research-year {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 16px;
    padding: 4px 12px;
    background: rgba(184, 134, 11, 0.08);
    border: 1px solid rgba(184, 134, 11, 0.2);
}

.research-card h3 {
    font-family: var(--font-serif);
    font-size: 1.125rem;
    font-weight: 500;
    line-height: 1.35;
    margin-bottom: 14px;
}

.research-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.research-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

/* --- Animations --- */
[data-animate] {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.1, 0.25, 1),
                transform 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    :root { --section-padding: 100px; }
    .container { padding: 0 32px; }

    .about-grid { grid-template-columns: 1fr; gap: 60px; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .credentials-grid { grid-template-columns: repeat(2, 1fr); }
    .credential-card.credential-featured { grid-column: span 2; }
    .expertise-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .philosophy-grid { grid-template-columns: 1fr; gap: 48px; }
    .research-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root { --section-padding: 80px; }
    .container { padding: 0 24px; }

    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 0; right: -100%;
        width: 80%;
        max-width: 360px;
        height: 100vh;
        background: var(--color-surface);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 40px 40px;
        gap: 24px;
        transition: right 0.4s ease;
        box-shadow: -20px 0 60px rgba(0,0,0,0.1);
    }
    .nav-links.open { right: 0; }
    .nav-links a { color: var(--color-text) !important; font-size: 1rem; }
    .nav-cta { border-color: var(--color-text) !important; }

    .hero-title { font-size: clamp(2.5rem, 10vw, 4rem); }
    .hero-meta { flex-direction: column; gap: 8px; }
    .hero-divider { display: none; }
    .hero-actions { flex-direction: column; align-items: center; }

    .about-credentials { grid-template-columns: 1fr; gap: 24px; }
    .about-stats { grid-template-columns: 1fr 1fr; }

    .services-grid { grid-template-columns: 1fr; }
    .service-card { padding: 36px 28px; }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 32px 0;
    }

    .credentials-grid { grid-template-columns: 1fr; }
    .credential-card.credential-featured { grid-column: span 1; }
    .credential-card { padding: 20px; }
    .expertise-grid { grid-template-columns: 1fr; gap: 32px; }
    .philosophy-grid { grid-template-columns: 1fr; }
    .research-cards { grid-template-columns: 1fr; }
    .research-card { padding: 28px; }

    .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
    .contact-meta { flex-direction: column; gap: 8px; }
    .contact-divider { display: none; }
}