/* =========================================================
   AVALIA — Design Tokens
   Theme: hybrid (dark hero/architecture/security, light rest)
   Accent: monochrome blue
   Type: IBM Plex Sans (UI) + IBM Plex Mono (labels/data)
   ========================================================= */

:root {
  /* Color — neutrals */
  --navy-900: #0F172A;   /* base dark background */
  --navy-800: #16213A;   /* elevated dark surface (cards on dark) */
  --navy-700: #1E2B47;   /* borders/dividers on dark */
  --off-white: #F8FAFC;  /* base light background */
  --surface-tint: #EEF2FA; /* alternate light background, for adjacent-section contrast */
  --white: #FFFFFF;      /* elevated light surface (cards on light) */
  --gray-200: #E2E8F0;   /* borders/dividers on light */
  --gray-400: #94A3B8;   /* muted text on dark */
  --gray-500: #64748B;   /* secondary text on light */
  --gray-900: #0F172A;   /* primary text on light */

  /* Color — monochrome blue accent */
  --blue-900: #1E3A8A;   /* primary accent, CTA fill */
  --blue-700: #2547A8;   /* primary hover */
  --blue-400: #60A5FA;   /* tint — links/accents on dark, icon strokes */
  --blue-100: #DBEAFE;   /* tint background on light (badges, hovers) */

  /* Color — problem/solution narrative tints (warm = tension, cool = resolution) */
  --warm-tint: #FBF3EA;  /* Problem section background */
  --amber-700: #B45309;  /* Problem section accent — index numbers, eyebrow */
  --cool-tint: #EAF2FE;  /* Solution section background */

  /* Text on dark sections */
  --text-on-dark: #E2E8F0;
  --text-on-dark-muted: var(--gray-400);

  /* Text on light sections */
  --text-on-light: var(--gray-900);
  --text-on-light-muted: var(--gray-500);

  /* Typography */
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;

  /* Fluid type scale */
  --text-eyebrow: 0.8125rem;
  --text-body: clamp(1rem, 0.95rem + 0.15vw, 1.0625rem);
  --text-h1: clamp(1.875rem, 1.6rem + 1.6vw, 3rem);
  --text-h2: clamp(1.75rem, 1.55rem + 1vw, 2.5rem);
  --text-h3: clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  /* Layout */
  --container-width: 1180px;
  --container-pad: var(--space-3);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================================
   Reset
   ========================================================= */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  color: var(--text-on-light);
  background: var(--off-white);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.15;
  text-wrap: balance;
}

/* Anchor scroll offset so section headings land just below the viewport edge */
section[id], div[id] {
  scroll-margin-top: 24px;
}

/* Visible focus state for keyboard users */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue-400);
  outline-offset: 2px;
}

/* =========================================================
   Layout primitives
   ========================================================= */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-7);
}

.section--dark {
  background: var(--navy-900);
  color: var(--text-on-dark);
}

.section--light {
  background: var(--off-white);
  color: var(--text-on-light);
}

.section--tint {
  background: var(--surface-tint);
  color: var(--text-on-light);
}

.section--warm {
  background: var(--warm-tint);
  color: var(--text-on-light);
}

.section--cool {
  background: var(--cool-tint);
  color: var(--text-on-light);
}

.section--sm {
  padding-block: var(--space-5);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-5);
}

/* =========================================================
   Typography components
   ========================================================= */

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-eyebrow);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue-400);
  margin-bottom: var(--space-2);
}

.section--light .eyebrow,
.section--tint .eyebrow,
.section--cool .eyebrow {
  color: var(--blue-900);
}

.section--warm .eyebrow {
  color: var(--amber-700);
}

h1, .h1 {
  font-size: var(--text-h1);
  letter-spacing: -0.02em;
}

h2, .h2 {
  font-size: var(--text-h2);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

h3, .h3 {
  font-size: var(--text-h3);
  margin-bottom: var(--space-2);
}

.body-lead {
  font-size: clamp(1.0625rem, 1rem + 0.3vw, 1.25rem);
  color: var(--text-on-light-muted);
}

.section--dark .body-lead,
.section--dark p {
  color: var(--text-on-dark-muted);
}

/* Higher specificity than ".section--dark p" so eyebrows keep their accent
   color instead of inheriting the muted dark-section paragraph color. */
.section--dark .eyebrow {
  color: var(--blue-400);
}

/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--blue-400);
  border-color: var(--blue-400);
  color: var(--navy-900);
}

.btn-primary:hover {
  background: color-mix(in srgb, var(--blue-400) 85%, black);
  border-color: color-mix(in srgb, var(--blue-400) 85%, black);
}

.btn-outline {
  background: transparent;
  border-color: var(--blue-400);
  color: var(--blue-400);
}

.btn-outline:hover {
  background: color-mix(in srgb, var(--blue-400) 15%, transparent);
  border-color: var(--blue-400);
  color: var(--blue-400);
}

/* TEMP: darker button color test — delete these two rules along with the
   test markup in the "Who's behind AVALIA" section if not preferred. */
.btn-primary-dark {
  background: var(--blue-900);
  border-color: var(--blue-900);
  color: var(--white);
}

.btn-primary-dark:hover {
  background: var(--blue-700);
  border-color: var(--blue-700);
}

.btn-outline-dark {
  background: transparent;
  border-color: var(--blue-900);
  color: var(--blue-900);
}

.btn-outline-dark:hover {
  background: var(--blue-100);
  border-color: var(--blue-900);
  color: var(--blue-900);
}

/* =========================================================
   Cards
   ========================================================= */

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.section--dark .card {
  background: var(--navy-800);
  border-color: var(--navy-700);
}

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--blue-100);
  color: var(--blue-900);
  margin-bottom: var(--space-3);
}

.section--dark .card-icon {
  background: rgba(96, 165, 250, 0.12);
  color: var(--blue-400);
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

/* =========================================================
   Grids
   ========================================================= */

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 900px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .grid-3,
  .grid-2,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .trusted-by__logos li {
    /* 2 per row on small screens */
    flex: 0 0 calc(50% - var(--space-5) / 2);
  }

  .section {
    padding-block: var(--space-6);
  }
}

/* =========================================================
   Trusted By
   ========================================================= */

.trusted-by__logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-5) var(--space-6);
}

.trusted-by__logos li {
  /* 4 per row: item width = (100% - 3 column gaps) / 4 */
  flex: 0 0 calc(25% - var(--space-6) * 3 / 4);
  display: flex;
  justify-content: center;
}

.trusted-by__logo {
  max-height: 58px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}

.trusted-by__banner {
  display: flex;
  justify-content: center;
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--gray-200);
  text-align: center;
}

.trusted-by__banner-logo {
  display: inline-block;
  height: 1.8em;
  width: auto;
  vertical-align: middle;
  margin-bottom: 0.15em;
}

.trusted-by__banner p {
  font-size: 1.1875rem;
  color: var(--text-on-light-muted);
}

/* =========================================================
   Solution — pillar list
   ========================================================= */

.pillar-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pillar {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.pillar:hover {
  border-color: var(--blue-900);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.1);
  transform: translateY(-2px);
}

#problem .pillar:hover {
  border-color: var(--amber-700);
}

.pillar__index {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue-900);
}

#problem .pillar__index {
  color: var(--amber-700);
}

/* =========================================================
   Architecture — subsections
   ========================================================= */

.arch-subsection {
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--navy-700);
}

.arch-subsection:first-of-type {
  margin-top: var(--space-5);
  padding-top: 0;
  border-top: none;
}

.arch-subsection__desc {
  max-width: 640px;
  margin-top: var(--space-2);
  margin-bottom: var(--space-5);
  color: var(--text-on-dark-muted);
}

/* =========================================================
   Architecture — flow diagram
   ========================================================= */

.arch-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--navy-800);
  border: 1px solid var(--navy-700);
  border-radius: var(--radius-lg);
}

.arch-box {
  flex: 1 1 160px;
  max-width: 200px;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 500;
  padding: var(--space-3) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--navy-900);
  border: 1px solid var(--navy-700);
  color: var(--text-on-dark);
}

.arch-box span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-on-dark-muted);
  margin-top: 0.25rem;
}

.arch-box--highlight {
  background: var(--blue-900);
  border-color: var(--blue-700);
  color: var(--white);
}

.arch-box--highlight span {
  color: rgba(255, 255, 255, 0.75);
}

.arch-box--outline {
  background: transparent;
  border: 1px dashed var(--blue-400);
}

.arch-arrow {
  font-family: var(--font-mono);
  color: var(--blue-400);
  font-size: 1.25rem;
  text-align: center;
  line-height: 1.2;
  flex: 0 0 auto;
}

.arch-arrow small {
  display: block;
  font-size: 0.6875rem;
  color: var(--text-on-dark-muted);
}

@media (max-width: 760px) {
  .arch-diagram {
    flex-direction: column;
  }

  .arch-arrow {
    transform: rotate(90deg);
  }
}

.arch-layers {
  margin-bottom: var(--space-6);
}

.arch-diagram--pipeline {
  margin-bottom: 0;
}

.arch-diagram--pipeline .arch-box {
  flex-basis: 140px;
  font-size: 0.8125rem;
}

/* =========================================================
   Security — feature cards
   ========================================================= */

.security-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.security-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.security-feature:hover {
  border-color: var(--blue-900);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.1);
  transform: translateY(-2px);
}

.security-feature__icon {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--blue-100);
  color: var(--blue-900);
}

.security-feature__icon svg {
  width: 22px;
  height: 22px;
}

.security-feature__text h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.3em;
}

.security-feature__text p {
  color: var(--text-on-light-muted);
  font-size: 0.9375rem;
}

@media (max-width: 640px) {
  .security-feature {
    flex-direction: column;
  }
}

/* =========================================================
   Who It's For — audience strip
   ========================================================= */

.audience-strip {
  display: flex;
  gap: var(--space-5);
}

.audience-strip__item {
  flex: 1;
  padding-inline: var(--space-4);
  text-align: center;
}

.audience-strip__item:first-child {
  padding-left: 0;
}

.audience-strip__item:last-child {
  padding-right: 0;
}

.audience-strip__item + .audience-strip__item {
  border-left: 1px solid var(--gray-200);
}

.audience-strip__icon {
  width: 56px;
  height: 56px;
  margin-inline: auto;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-900);
}

.audience-strip__icon svg {
  width: 34px;
  height: 34px;
}

@media (max-width: 900px) {
  .audience-strip {
    flex-direction: column;
    gap: var(--space-5);
  }

  .audience-strip__item {
    padding-inline: 0;
  }

  .audience-strip__item + .audience-strip__item {
    border-left: none;
    padding-top: var(--space-5);
    border-top: 1px solid var(--gray-200);
  }
}

/* =========================================================
   How to Get AVALIA — engagement rows
   ========================================================= */

.engagement-list {
  border-top: 1px solid var(--gray-200);
}

.engagement-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-4);
  padding-block: var(--space-4);
  padding-left: var(--space-4);
  border-bottom: 1px solid var(--gray-200);
  border-left: 3px solid var(--blue-900);
}

.engagement-row__label {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--blue-900);
}

@media (max-width: 900px) {
  .engagement-row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}

/* =========================================================
   Milestones — timeline
   ========================================================= */

.timeline {
  position: relative;
  padding-top: var(--space-2);
}

.timeline__track {
  position: absolute;
  top: calc(var(--space-2) + 15px);
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    to right,
    var(--blue-900) 0%,
    var(--blue-900) 50%,
    var(--gray-200) 50%,
    var(--gray-200) 100%
  );
}

.timeline__list {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
}

.timeline__item {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}

.timeline__text {
  display: flex;
  flex-direction: column;
  gap: 0.2em;
}

.timeline__marker {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--off-white);
  border: 2px solid var(--gray-200);
}

.timeline__item.is-done .timeline__marker {
  background: var(--blue-900);
  border-color: var(--blue-900);
}

.timeline__item.is-current .timeline__marker {
  background: var(--off-white);
  border-color: var(--blue-900);
  box-shadow: 0 0 0 4px var(--blue-100);
  animation: timeline-pulse 2s var(--ease) infinite;
}

.timeline__label {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-on-light-muted);
}

.timeline__item.is-current .timeline__label {
  color: var(--text-on-light);
}

.section--dark .timeline__label {
  color: var(--text-on-dark-muted);
}

.section--dark .timeline__item.is-current .timeline__label {
  color: var(--text-on-dark);
}

.timeline__status {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-on-light-muted);
}

.timeline__item.is-current .timeline__status {
  color: var(--blue-900);
}

.timeline__item.is-done .timeline__status {
  color: color-mix(in srgb, var(--blue-900) 55%, var(--text-on-light-muted));
}

.section--dark .timeline__item.is-done .timeline__status {
  color: color-mix(in srgb, var(--blue-400) 55%, var(--text-on-dark-muted));
}

@keyframes timeline-pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--blue-100); }
  50% { box-shadow: 0 0 0 8px var(--blue-100); }
}

.section--dark .timeline__track {
  background: linear-gradient(
    to right,
    var(--blue-400) 0%,
    var(--blue-400) 50%,
    var(--navy-700) 50%,
    var(--navy-700) 100%
  );
}

.section--dark .timeline__marker {
  background: var(--navy-900);
  border-color: var(--navy-700);
}

.section--dark .timeline__item.is-done .timeline__marker {
  background: var(--blue-400);
  border-color: var(--blue-400);
}

.section--dark .timeline__item.is-current .timeline__marker {
  background: var(--navy-900);
  border-color: var(--blue-400);
  box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.25);
  animation: timeline-pulse-dark 2s var(--ease) infinite;
}

.section--dark .timeline__status {
  color: var(--text-on-dark-muted);
}

.section--dark .timeline__item.is-current .timeline__status {
  color: var(--blue-400);
}

@keyframes timeline-pulse-dark {
  0%, 100% { box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.25); }
  50% { box-shadow: 0 0 0 8px rgba(96, 165, 250, 0.25); }
}

@media (max-width: 900px) {
  .timeline {
    padding-bottom: var(--space-2);
  }
  .timeline__track {
    top: calc(var(--space-2) + 15px);
    bottom: calc(var(--space-2) + 15px);
    left: 15px;
    right: auto;
    width: 2px;
    height: auto;
    background: linear-gradient(
      to bottom,
      var(--blue-900) 0%,
      var(--blue-900) 50%,
      var(--gray-200) 50%,
      var(--gray-200) 100%
    );
  }
  .section--dark .timeline__track {
    background: linear-gradient(
      to bottom,
      var(--blue-400) 0%,
      var(--blue-400) 50%,
      var(--navy-700) 50%,
      var(--navy-700) 100%
    );
  }
  .timeline__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
  .timeline__item {
    flex-direction: row;
    text-align: left;
  }
}

/* =========================================================
   Team — actions, founder spotlight
   ========================================================= */

.team__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.founders {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--gray-200);
}

.founder {
  flex: 1;
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.founder + .founder {
  padding-left: var(--space-6);
  border-left: 1px solid var(--gray-200);
}

.founder__photo {
  flex: 0 0 auto;
  width: 104px;
  height: 104px;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.founder h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.2em;
}

.founder__role {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-900);
  margin-bottom: var(--space-2);
}

.founder__bio {
  font-size: 0.9375rem;
  color: var(--text-on-light-muted);
}

@media (max-width: 900px) {
  .founders {
    flex-direction: column;
    gap: var(--space-5);
  }

  .founder + .founder {
    padding-left: 0;
    padding-top: var(--space-5);
    border-left: none;
    border-top: 1px solid var(--gray-200);
  }
}

/* =========================================================
   Contact
   ========================================================= */

.contact-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.contact-cta__email {
  display: flex;
  align-items: center;
  gap: 0.6em;
  padding: var(--space-3) var(--space-4);
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-on-light);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.contact-cta__email svg {
  width: 22px;
  height: 22px;
  color: var(--blue-900);
}

.contact-cta__email:hover {
  background: var(--blue-400);
  border-color: var(--blue-400);
  transform: translateY(-2px);
}

.contact-cta__social {
  display: flex;
  gap: var(--space-3);
}

.contact-cta__social a {
  display: flex;
  color: var(--text-on-light-muted);
  transition: color 0.2s var(--ease);
}

.contact-cta__social a:hover {
  color: var(--blue-900);
}

.contact-cta__social svg {
  width: 22px;
  height: 22px;
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  background: var(--navy-900);
  color: var(--text-on-dark-muted);
}

.footer__grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-block: var(--space-6);
}

.footer__brand {
  max-width: 340px;
}

.footer__brand .logo {
  margin-bottom: var(--space-2);
}

.footer__tagline {
  font-weight: 600;
  color: var(--text-on-dark-muted);
}

.footer__description {
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  color: var(--text-on-dark-muted);
  opacity: 0.8;
}

.footer__links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-3);
}

.footer__links-heading {
  font-weight: 600;
  color: var(--text-on-dark);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social a {
  display: flex;
  color: var(--text-on-dark-muted);
  transition: color 0.2s var(--ease);
}

.footer__social a:hover {
  color: var(--blue-400);
}

.footer__social svg {
  width: 20px;
  height: 20px;
}

.footer__legal {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-block: var(--space-3);
  border-top: 1px solid var(--navy-700);
  font-size: 0.8125rem;
}

@media (max-width: 640px) {
  .footer__grid {
    flex-direction: column;
  }

  .footer__links {
    align-items: flex-start;
  }

  .footer__legal {
    flex-direction: column;
  }
}


/* =========================================================
   Architecture — security level visual
   ========================================================= */

.sec-levels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.sec-level {
  position: relative;
  background: var(--navy-800);
  border: 1px solid var(--navy-700);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.sec-level--recommended {
  border-color: var(--blue-400);
}

.sec-level__badge {
  position: absolute;
  top: -0.65rem;
  left: var(--space-4);
  background: var(--blue-400);
  color: var(--navy-900);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.sec-level__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  margin-bottom: 0.35rem;
}

.sec-level--recommended .sec-level__index {
  color: var(--blue-400);
}

.sec-level__name {
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
}

.sec-level__bar {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.sec-level__seg-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.sec-level__seg-label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  text-align: center;
}

.sec-level__seg {
  display: block;
  width: 100%;
  height: 8px;
  border-radius: 3px;
}

.sec-level__seg--avalia {
  background: var(--blue-400);
}

.sec-level__seg--client {
  background: transparent;
  border: 1px dashed var(--gray-400);
}

.sec-levels__legend {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  color: var(--text-on-dark-muted);
}

.sec-levels__legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.sec-levels__legend .sec-level__seg {
  flex: none;
  display: inline-block;
  width: 14px;
}

@media (max-width: 760px) {
  .sec-levels {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   Logo
   ========================================================= */

.logo {
  display: flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--white);
}

.logo__icon {
  width: 1.25em;
  height: 1.25em;
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-block-start: var(--space-7);
}

.hero__logo {
  font-size: 1.75rem;
  margin-bottom: var(--space-4);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    radial-gradient(ellipse 55% 60% at 82% 20%, rgba(30, 58, 138, 0.5), transparent 65%),
    radial-gradient(circle, rgba(96, 165, 250, 0.4) 1.5px, transparent 1.5px);
  background-size: auto, 34px 34px;
  -webkit-mask-image: linear-gradient(115deg, transparent 5%, black 45%, black 100%);
  mask-image: linear-gradient(115deg, transparent 5%, black 45%, black 100%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero__sub {
  margin-block: var(--space-3) var(--space-4);
  max-width: 620px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero__by {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--navy-700);
}

.hero__by p {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-size: 0.9375rem;
  color: var(--text-on-dark-muted);
}

.hero__by-logo {
  height: 2rem;
  width: auto;
  background: var(--white);
  padding: 0.4em 0.7em;
  border-radius: 4px;
}

/* =========================================================
   Back to Top
   ========================================================= */

.back-to-top {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--blue-900);
  border: 2px solid var(--blue-900);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.18);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), background-color 0.2s var(--ease);
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--blue-700);
  border-color: var(--blue-700);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}