@import url('tokens.css');

/* ============================================================
   RESET & BASE
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0 }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height) }
body {
  font-family: var(--font-family-body);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: var(--line-height-relaxed);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3 {
  font-family: var(--font-family-display);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  font-weight: var(--font-weight-semibold);
}
.eyebrow {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-widest);
  text-transform: uppercase;
  color: var(--color-accent-primary-deep);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.wrap {
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-md);
  padding: 13px 22px;
  border-radius: var(--radius-md);
  transition: transform var(--duration-fast) var(--easing-default),
              background var(--duration-fast) var(--easing-default),
              box-shadow var(--duration-fast) var(--easing-default),
              border-color var(--duration-fast) var(--easing-default);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--color-text-primary);
  color: #fff;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}
.btn-primary .arr {
  color: var(--color-accent-primary-bright);
  transition: transform var(--duration-fast) var(--easing-default);
}
.btn-primary:hover .arr { transform: translateX(3px) }
.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-primary);
}
.btn-ghost:hover {
  border-color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg-nav);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-secondary);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
}
.nav-links a {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color var(--duration-fast), border-color var(--duration-fast);
}
.nav-links a:hover {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-accent-primary);
}
.nav-cta {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--color-text-primary);
}
.nav-toggle svg { display: block }
@media (max-width: 900px) {
  .nav-toggle { display: flex }
  .nav-links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    flex-direction: column;
    padding: var(--space-12) var(--content-padding);
    gap: var(--space-4);
    z-index: 100;
    border-top: 1px solid var(--color-border-primary);
    border-bottom: 1px solid var(--color-border-primary);
    box-shadow: var(--shadow-md);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity var(--duration-fast) var(--easing-default),
                visibility var(--duration-fast) var(--easing-default),
                transform var(--duration-fast) var(--easing-default);
  }
  .nav-links.open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }
  .nav-links a {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border-secondary);
  }
  .nav-links a:last-child { border-bottom: none }
  .nav-links a { font-size: var(--font-size-xl) }
  .nav-cta .btn-ghost { display: none }
}

/* ============================================================
   SECTION PATTERNS
   ============================================================ */
section.block { padding: var(--space-40) 0 }
.sec-head {
  max-width: var(--max-width-content);
  margin-bottom: var(--space-24);
}
.sec-head h2 {
  font-size: var(--font-size-6xl);
  margin: var(--space-7) 0 var(--space-7);
}
.sec-head p {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
}
@media (max-width: 920px) {
  .sec-head h2 { font-size: 28px }
  section.block { padding: var(--space-28) 0 }
}

/* Dark section (problem blocks) */
.problem {
  background: var(--color-bg-inverse);
  color: var(--color-text-inverse);
  border-radius: var(--radius-3xl);
  padding: 64px 56px;
  margin: var(--space-4) 0;
}
.problem .eyebrow { color: var(--color-accent-primary-bright) }
.problem h2 {
  font-size: var(--font-size-5xl);
  color: var(--color-text-inverse);
  margin: var(--space-8) 0 var(--space-10);
  max-width: var(--max-width-content);
}
.problem p {
  color: var(--color-text-inverse-soft);
  font-size: var(--font-size-xl);
  max-width: var(--max-width-content);
  margin-bottom: var(--space-7);
}
.problem p b { color: var(--color-text-inverse); font-weight: var(--font-weight-semibold) }
@media (max-width: 920px) {
  .problem { padding: 40px 28px }
  .problem h2 { font-size: 26px }
}

/* ============================================================
   TRUST BAR
   ============================================================ */
.trust { padding: var(--space-4) 0 var(--space-20) }
.trust-line {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-9);
  text-align: center;
}
.logos {
  display: flex;
  gap: var(--space-24);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  opacity: 0.85;
}
.logos .lg {
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-3xl);
  color: var(--color-text-secondary);
  letter-spacing: -0.3px;
}
.logos .lg span { color: var(--color-accent-primary-deep) }

/* ============================================================
   WHY / 3-COLUMN BENEFITS
   ============================================================ */
.why {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-20);
}
.wcard h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.wcard h3 .d {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--color-accent-primary);
}
.wcard p {
  color: var(--color-text-muted);
  font-size: 15.5px;
}
@media (max-width: 920px) {
  .why { grid-template-columns: 1fr; gap: 26px }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  border-top: 1px solid var(--color-border-primary);
  padding: var(--space-28) 0 var(--space-20);
  margin-top: var(--space-20);
}
.foot-grid {
  display: flex;
  justify-content: space-between;
  gap: var(--space-20);
  flex-wrap: wrap;
}
.foot-col h4 {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-bold);
}
.foot-col a {
  display: block;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
}
.foot-col a:hover { color: var(--color-text-primary) }
.social {
  display: flex;
  gap: var(--space-5);
  margin-top: var(--space-3);
}
.social a {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border-primary);
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: border-color var(--duration-fast), color var(--duration-fast);
}
.social a:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary-deep);
}
.foot-bot {
  margin-top: var(--space-20);
  padding-top: var(--space-12);
  border-top: 1px solid var(--color-border-secondary);
  font-size: 13px;
  color: var(--color-text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-6);
}

/* ============================================================
   SVG ENGINE ANIMATION
   ============================================================ */
.engine {
  width: 100%;
  height: auto;
  max-width: 560px;
  margin: 0 auto;
  display: block;
}
.flow {
  stroke-dasharray: var(--animation-flow-dash);
  animation: flow var(--animation-flow-speed) linear infinite;
}
.flow2 {
  stroke-dasharray: var(--animation-flow-dash);
  animation: flow 1s linear infinite;
}
@keyframes flow { to { stroke-dashoffset: -28 } }
.core-pulse {
  transform-origin: center;
  animation: pulse var(--animation-pulse-speed) ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.18; transform: scale(1) }
  50% { opacity: 0.34; transform: scale(1.06) }
}
@media (prefers-reduced-motion: reduce) {
  .flow, .flow2, .core-pulse { animation: none }
}

/* ============================================================
   FORMS (shared)
   ============================================================ */
label {
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
}
input, select, textarea {
  font-family: var(--font-family-body);
  font-size: var(--font-size-md);
  padding: var(--space-6) var(--space-7);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 0;
  background: var(--color-bg-secondary);
}
textarea { resize: vertical; min-height: 74px }

/* ============================================================
   LOGIN MODAL (shared)
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
}
.modal-overlay.show { display: flex }
.modal {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-2xl);
  padding: var(--space-20);
  max-width: 400px;
  width: 100%;
  position: relative;
}
.modal .close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 32px;
  height: 32px;
  border: none;
  background: var(--color-bg-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 18px;
  color: var(--color-text-muted);
}
.modal h3 {
  font-size: 22px;
  margin-bottom: var(--space-3);
  text-align: center;
}
.modal .msub {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
  margin-bottom: 26px;
}
.oauth {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.oauth button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  width: 100%;
  padding: 13px;
  border: 1px solid var(--color-border-primary);
  border-radius: 11px;
  background: var(--color-bg-secondary);
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: border-color var(--duration-fast), background var(--duration-fast);
}
.oauth button:hover {
  border-color: var(--color-text-secondary);
  background: var(--color-bg-primary);
}
.oauth button svg { width: 20px; height: 20px; flex-shrink: 0 }
.modal .modal-notice {
  display: none;
  margin-top: var(--space-8);
  padding: 10px 14px;
  font-size: 13px;
  color: var(--color-text-muted);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  text-align: center;
}
.modal .legal {
  margin-top: var(--space-10);
  font-size: 11.5px;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.5;
}
.modal .legal a { color: var(--color-accent-primary-deep) }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list {
  max-width: var(--max-width-content);
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--color-border-primary);
  padding: var(--space-10) 0;
}
.faq-item:first-child { border-top: 1px solid var(--color-border-primary) }
.faq-item summary {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-8);
}
.faq-item summary::-webkit-details-marker { display: none }
.faq-item summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  content: "−";
}
.faq-item p {
  margin-top: var(--space-6);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  max-width: 640px;
}