/* ============================================
   CSK Growth Partners — Brand Stylesheet
   Per brand-guidelines.md v1
   ============================================ */

:root {
  /* Colors */
  --navy: #0A1D2F;
  --navy-light: #142a44;
  --blue: #1A56FF;
  --blue-hover: #1444cc;
  --green: #15803d;
  --neutral-dark: #475569;
  --neutral-mid: #94a3b8;
  --neutral-light: #E5E7EB;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, #15803d 0%, #1A56FF 100%);

  /* Typography */
  --font-head: 'Sora', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 4vw, 2rem);
  --section-pad-y: clamp(4rem, 10vw, 7rem);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--white);
  background-color: var(--navy);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--white);
}

h1 { font-size: clamp(2rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); margin-bottom: 0.5rem; }

p {
  color: var(--neutral-light);
  margin-bottom: 1rem;
}

p.lede {
  font-size: 1.25rem;
  color: var(--white);
  max-width: 56ch;
  margin-bottom: 2rem;
}

a {
  color: var(--white);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

ul {
  list-style: none;
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-block;
  padding: 0.95rem 1.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0;
  border: 1.5px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--blue);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--blue-hover);
  color: var(--white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: var(--white);
  color: var(--white);
}

/* ============================================
   Navigation
   ============================================ */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 29, 47, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav.container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-head);
  color: var(--white);
}

.wordmark .csk {
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.wordmark .gp {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--neutral-mid);
  font-weight: 500;
}

/* Logo image (replaces text wordmark in nav) */
.logo-img {
  height: 52px;
  width: auto;
  display: block;
}

@media (max-width: 720px) {
  .logo-img {
    height: 40px;
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--neutral-light);
}

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

.nav-links .cta {
  color: var(--white);
  font-weight: 500;
}

@media (max-width: 720px) {
  .nav-links {
    gap: 1rem;
  }
  .nav-links li:not(:last-child) {
    display: none;
  }
}

/* ============================================
   Hero
   ============================================ */
.hero {
  padding: clamp(4rem, 8vw, 7rem) 0 clamp(4rem, 9vw, 8rem);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -10%;
  width: 60%;
  height: 100%;
  background: var(--gradient);
  opacity: 0.06;
  filter: blur(80px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 920px;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero h1 .accent {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero .subhead {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  color: var(--neutral-light);
  margin-bottom: 2.5rem;
  max-width: 56ch;
  line-height: 1.5;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.trust-line {
  font-size: 0.95rem;
  color: var(--neutral-mid);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 1.5rem;
  max-width: 56ch;
}

/* ============================================
   Sections (general)
   ============================================ */
section.section {
  padding: var(--section-pad-y) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1rem;
}

.section-lede {
  font-size: 1.25rem;
  color: var(--neutral-light);
  max-width: 56ch;
  margin-bottom: 2.5rem;
  line-height: 1.5;
}

/* ============================================
   Problem section
   ============================================ */
.problem-list {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  max-width: 720px;
}

.problem-list li {
  padding-left: 1.75rem;
  position: relative;
  color: var(--neutral-light);
  font-size: 1.0625rem;
  line-height: 1.55;
}

.problem-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 1.5px;
  background-color: var(--blue);
}

.problem-summary {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 1.15rem;
  color: var(--white);
  max-width: 56ch;
}

/* ============================================
   Install section (three components)
   ============================================ */
.install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.install-card {
  padding: 2rem 1.75rem;
  background-color: var(--navy-light);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
}

.install-card-number {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--blue);
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.install-card h3 {
  margin-bottom: 0.75rem;
}

.install-card p {
  font-size: 0.95rem;
  margin: 0;
  color: var(--neutral-light);
}

.stack-line {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.stack-line h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--neutral-mid);
  margin-bottom: 0.75rem;
}

.stack-tools {
  font-size: 0.95rem;
  color: var(--neutral-light);
  line-height: 1.7;
}

.stack-tools span {
  color: var(--neutral-mid);
  padding: 0 0.5rem;
}

.stack-disclaimer {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--neutral-mid);
  font-style: italic;
}

/* ============================================
   How We Work (phases)
   ============================================ */
.phases {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

@media (min-width: 768px) {
  .phases {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .phases {
    grid-template-columns: repeat(4, 1fr);
  }
}

.phase {
  padding: 1.75rem 1.5rem;
  background-color: var(--navy-light);
  border-left: 3px solid var(--blue);
  border-radius: 4px;
}

.phase-label {
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 0.5rem;
}

.phase h3 {
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.phase p {
  font-size: 0.93rem;
  margin: 0;
  color: var(--neutral-light);
  line-height: 1.55;
}

.commit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 3.5rem;
}

@media (min-width: 768px) {
  .commit-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.commit-grid h4 {
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.commit-grid ul li {
  padding: 0.5rem 0;
  color: var(--neutral-light);
  font-size: 0.95rem;
}

/* ============================================
   Proof section
   ============================================ */
.proof-headline {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-family: var(--font-head);
  font-weight: 600;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin: 2rem 0 1rem;
  letter-spacing: -0.02em;
}

.proof-body {
  font-size: 1.125rem;
  color: var(--neutral-light);
  max-width: 65ch;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.proof-link {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 500;
  color: var(--blue);
  font-size: 0.95rem;
}

.proof-link:hover {
  color: var(--white);
}

.founder-block {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 768px) {
  .founder-block {
    grid-template-columns: 220px 1fr;
    gap: 2.5rem;
  }
}

.founder-block h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.founder-block p {
  font-size: 1rem;
  color: var(--neutral-light);
  max-width: 65ch;
  line-height: 1.65;
}

/* Founder photo */
.founder-photo {
  width: 100%;
  max-width: 220px;
  height: auto;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: block;
}

.founder-photo-large {
  max-width: 260px;
}

/* About page founder intro layout */
.founder-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
  margin: 1rem 0 1.5rem;
}

@media (min-width: 768px) {
  .founder-intro {
    grid-template-columns: 260px 1fr;
    gap: 2.5rem;
  }
}

.founder-intro p {
  margin-bottom: 0;
}

/* ============================================
   Engage (offers)
   ============================================ */
.offers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3rem;
}

@media (min-width: 900px) {
  .offers {
    grid-template-columns: repeat(3, 1fr);
  }
}

.offer {
  padding: 2.25rem 2rem;
  background-color: var(--navy-light);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
}

.offer h3 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.offer p {
  flex: 1;
  font-size: 0.97rem;
  color: var(--neutral-light);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.offer-meta {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neutral-mid);
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.engage-cta {
  margin-top: 4rem;
  text-align: center;
  padding-top: 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.engage-cta h3 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  margin-bottom: 1rem;
}

.engage-cta a.email {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 1.15rem;
  color: var(--blue);
  margin-top: 0.5rem;
}

.engage-cta a.email:hover {
  color: var(--white);
}

/* ============================================
   About page
   ============================================ */
.page-header {
  padding: clamp(4rem, 8vw, 6rem) 0 clamp(2rem, 4vw, 3rem);
}

.page-header h1 {
  margin-bottom: 1.5rem;
}

.page-content {
  padding-bottom: var(--section-pad-y);
}

.page-content h2 {
  margin-top: 3rem;
  margin-bottom: 1.25rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.page-content p {
  font-size: 1.0625rem;
  color: var(--neutral-light);
  max-width: 65ch;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

/* ============================================
   Contact page
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
  }
}

.contact-form label {
  display: block;
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neutral-mid);
  margin-bottom: 0.5rem;
  margin-top: 1.25rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background-color: var(--navy-light);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.15s ease;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--blue);
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form button {
  margin-top: 2rem;
  width: 100%;
}

@media (min-width: 768px) {
  .contact-form button {
    width: auto;
    min-width: 200px;
  }
}

.contact-direct {
  padding: 2rem;
  background-color: var(--navy-light);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  align-self: start;
}

.contact-direct h3 {
  font-size: 1.15rem;
  margin-bottom: 1.25rem;
}

.contact-direct .label {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--neutral-mid);
  margin-top: 1.25rem;
  margin-bottom: 0.25rem;
}

.contact-direct .value {
  color: var(--white);
  font-size: 1rem;
}

.contact-direct a {
  color: var(--blue);
}

.contact-direct a:hover {
  color: var(--white);
}

/* ============================================
   Footer
   ============================================ */
footer {
  background-color: var(--navy);
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 3rem;
  }
}

.footer-brand .tagline {
  margin-top: 1rem;
  font-size: 0.92rem;
  color: var(--neutral-mid);
  max-width: 32ch;
  line-height: 1.5;
}

.footer-col h5 {
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-col ul li {
  margin-bottom: 0.6rem;
  font-size: 0.92rem;
}

.footer-col ul a {
  color: var(--neutral-light);
}

.footer-col ul a:hover {
  color: var(--blue);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
  color: var(--neutral-mid);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}