/* =============================================================================
 * SIGNALNINE PROPOSAL — DESIGN TOKENS
 * Source: /site/src/app/globals.css + brand/signalnine-brand-protocol.pdf
 * Alabaster canvas · Charcoal ink · Drafting Gray grid · Aero Orange signal
 * ============================================================================= */

:root {
  --alabaster: #f9f9f6;
  --charcoal: #1a1a1a;
  --gray-draft: #e5e5e5;
  --orange-signal: #ff4f00;

  --font-sans:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --text-h1: clamp(40px, 6vw, 72px);
  --text-h2: clamp(32px, 4vw, 48px);
  --text-h3: clamp(24px, 3vw, 32px);
  --text-body: clamp(16px, 1.2vw, 18px);
  --text-small: 14px;
  --text-mono: 12px;

  --line-body: 1.5;
  --line-head: 1.15;

  --max-width: 1100px;
  --section-pad: clamp(64px, 8vw, 128px);
  --gutter: clamp(24px, 4vw, 64px);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
}

html {
  background: var(--alabaster);
  color: var(--charcoal);
  overflow-x: clip;
  scroll-behavior: smooth;
}

body {
  background: var(--alabaster);
  color: var(--charcoal);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--line-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-wrap: pretty;
}

::selection {
  background: var(--orange-signal);
  color: var(--charcoal);
}

/* =============================================================================
 * TYPOGRAPHY
 * ============================================================================= */

h1,
h2,
h3 {
  font-weight: 800;
  line-height: var(--line-head);
  letter-spacing: -0.02em;
  text-wrap: pretty;
}

h1 {
  font-size: var(--text-h1);
}
h2 {
  font-size: var(--text-h2);
}
h3 {
  font-size: var(--text-h3);
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--charcoal);
  text-decoration: none;
  position: relative;
}

a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--orange-signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

a:hover::after,
a:focus-visible::after {
  transform: scaleX(1);
}

:focus-visible {
  outline: 2px solid var(--orange-signal);
  outline-offset: 3px;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
  line-height: 1;
}

/* =============================================================================
 * LAYOUT
 * ============================================================================= */

.page {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section {
  padding: var(--section-pad) 0;
  border-top: 1px solid var(--gray-draft);
  position: relative;
}

section:first-of-type {
  border-top: none;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--orange-signal);
  width: 0%;
  z-index: 99999;
  pointer-events: none;
}

.kinetic-bar {
  position: absolute;
  left: -18px;
  top: calc(var(--section-pad) + 2px);
  width: 3px;
  height: 44px;
  background: var(--orange-signal);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

section.is-drawn .kinetic-bar {
  transform: scaleY(1);
}

@media (max-width: 768px) {
  .kinetic-bar {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .kinetic-bar {
    transition: none;
    transform: scaleY(1);
  }
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 360px), 1fr));
  gap: var(--gutter);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: var(--gutter);
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* =============================================================================
 * COMPONENTS
 * ============================================================================= */

.card {
  border: 1px solid var(--gray-draft);
  background: var(--alabaster);
  padding: clamp(24px, 3vw, 40px);
  transition:
    transform 100ms steps(2, end),
    box-shadow 100ms steps(2, end);
}

.card:hover {
  transform: translate(3px, -2px);
  box-shadow: -4px 5px 0 0 var(--charcoal);
}

.card-dark:hover {
  box-shadow: -4px 5px 0 0 var(--gray-draft);
}

.card-dark {
  background: var(--charcoal);
  color: var(--alabaster);
  border-color: var(--charcoal);
}

.reveal-card {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 360ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 360ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal-card {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.5em;
}

.label::before {
  content: "[ ";
}

.label::after {
  content: " ]";
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: var(--text-body);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 1em 2em;
  border: 1px solid var(--charcoal);
  background: var(--orange-signal);
  color: var(--charcoal);
  cursor: pointer;
  transition:
    transform 100ms steps(2, end),
    box-shadow 100ms steps(2, end);
}

.btn:hover,
.btn:focus-visible {
  transform: translate(7px, -4px);
  box-shadow: -7px 8px 0 0 var(--charcoal);
}

.btn:active {
  transition: none;
  transform: translate(0, 0);
  box-shadow: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-secondary {
  background: transparent;
  color: var(--charcoal);
}

.table-wrap {
  margin-top: 48px;
  overflow-x: auto;
  position: relative;
}

.table-wrap::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 32px;
  background: linear-gradient(to right, transparent, var(--alabaster));
  pointer-events: none;
  opacity: 0;
  transition: opacity 200ms ease;
}

.table-wrap.is-scrollable::after {
  opacity: 1;
}

.table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: var(--text-body);
}

.table th,
.table td {
  padding: 1em;
  text-align: left;
  border-bottom: 1px solid var(--gray-draft);
  vertical-align: top;
  white-space: nowrap;
}

.table td:first-child {
  white-space: normal;
  min-width: 220px;
}

.table th {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  color: var(--charcoal);
  opacity: 0.6;
}

.table tfoot td {
  border-top: 2px solid var(--charcoal);
  border-bottom: 2px solid var(--charcoal);
  font-weight: 700;
}

@media (max-width: 640px) {
  .table th,
  .table td {
    padding: 0.75em 0.5em;
    font-size: var(--text-small);
  }
}

.list-spec {
  list-style: none;
}

.list-spec li {
  position: relative;
  padding-left: 1.5em;
  margin-bottom: 0.75em;
}

.list-spec li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--orange-signal);
  font-weight: 700;
}

/* =============================================================================
 * TERMS
 * ============================================================================= */

.terms-list {
  margin-top: 48px;
  display: grid;
  gap: 40px;
}

.terms-item {
  padding-left: 24px;
  border-left: 2px solid var(--gray-draft);
}

.terms-title {
  opacity: 0.6;
  margin-bottom: 10px;
  display: block;
}

.terms-item > p {
  opacity: 0.7;
  margin: 0;
}

/* =============================================================================
 * HEADER
 * ============================================================================= */

.proposal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--gutter) 0;
  border-bottom: 1px solid var(--gray-draft);
}

.header-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.proposal-header .meta {
  text-align: right;
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.8;
}

.doc-id {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.4;
}

.logo-sig9 {
  width: 140px;
  height: auto;
}

@media (max-width: 768px) {
  .proposal-header {
    flex-direction: column;
    gap: 24px;
  }
  .proposal-header .meta {
    text-align: left;
  }
}

/* =============================================================================
 * COVER
 * ============================================================================= */

.cover {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--section-pad) 0;
  position: relative;
}

.cover::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(229, 229, 229, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(229, 229, 229, 0.5) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0;
  animation: blueprint-fade 800ms cubic-bezier(0.16, 1, 0.3, 1) 200ms forwards;
}

.cover h1 {
  max-width: 900px;
  margin-top: 24px;
}

.cover-client {
  font-size: clamp(18px, 1.5vw, 22px);
  margin-top: 32px;
  opacity: 0.7;
}

.cover-date {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 16px;
  opacity: 0.5;
}

.cover-reveal {
  opacity: 0;
  transform: translateY(16px);
  animation: cover-reveal-snap 320ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.cover-reveal[data-reveal-order="1"] {
  animation-delay: 60ms;
}
.cover-reveal[data-reveal-order="2"] {
  animation-delay: 120ms;
}
.cover-reveal[data-reveal-order="3"] {
  animation-delay: 220ms;
}
.cover-reveal[data-reveal-order="4"] {
  animation-delay: 320ms;
}

@keyframes cover-reveal-snap {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blueprint-fade {
  to {
    opacity: 0.35;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cover-reveal {
    opacity: 1;
    transform: none;
    animation: none;
  }
  .cover::before {
    opacity: 0.25;
    animation: none;
  }
}

/* =============================================================================
 * LETTER — warmth through voice, not decorative font
 * ============================================================================= */

.letter {
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.6;
  max-width: 680px;
  padding-left: 24px;
  border-left: 2px solid var(--orange-signal);
}

.letter p {
  margin-bottom: 1em;
}

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

/* =============================================================================
 * TIMELINE
 * ============================================================================= */

.timeline-list {
  margin-top: 48px;
  display: grid;
  gap: 16px;
}

.timeline-row {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.timeline-phase {
  color: var(--orange-signal);
  flex-shrink: 0;
  min-width: 28px;
}

.timeline-body {
  flex: 1;
  min-width: 0;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px 24px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.timeline-header h3 {
  font-size: 20px;
  margin: 0;
}

.timeline-days {
  opacity: 0.6;
  flex-shrink: 0;
  white-space: nowrap;
}

.timeline-body > p {
  opacity: 0.7;
  margin: 0;
}

@media (max-width: 480px) {
  .timeline-header {
    flex-direction: column;
    gap: 6px;
  }
  .timeline-days {
    white-space: normal;
  }
}

/* =============================================================================
 * SIGNATURE
 * ============================================================================= */

.signatures {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gutter);
  margin-top: 48px;
}

.sig-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sig-label {
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sig-box,
.date-box {
  border: 1px solid var(--gray-draft);
  background: rgba(26, 26, 26, 0.02);
  height: 90px;
  display: flex;
  align-items: center;
  padding: 0 20px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.sig-box:hover,
.date-box:hover {
  border-color: var(--charcoal);
}

.date-box {
  height: 60px;
}

.sig-placeholder {
  color: var(--charcoal);
  opacity: 0.4;
}

.sig-image {
  height: 50px;
  object-fit: contain;
  filter: contrast(1.4) brightness(0.85);
}

.sig-box,
.date-box {
  position: relative;
  transition:
    border-color 180ms cubic-bezier(0.16, 1, 0.3, 1),
    background 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.sig-box:hover,
.sig-box:focus-visible,
.date-box:hover,
.date-box:focus-visible {
  border-color: var(--orange-signal);
  outline: none;
}

.sig-box.is-signed,
.date-box.is-set {
  border-color: var(--charcoal);
  background: rgba(26, 26, 26, 0.04);
  animation: sig-lock 240ms steps(3, end);
}

.sig-box.is-signed::after,
.date-box.is-set::after {
  content: "[ SIGNED ]";
  position: absolute;
  top: 8px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--orange-signal);
  opacity: 0;
  animation: badge-snap 200ms steps(2, end) 200ms forwards;
}

.date-box.is-set::after {
  content: "[ SET ]";
}

@keyframes sig-lock {
  0% {
    border-color: var(--gray-draft);
  }
  50% {
    border-color: var(--orange-signal);
  }
  100% {
    border-color: var(--charcoal);
  }
}

@keyframes badge-snap {
  to {
    opacity: 1;
  }
}

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

/* Signature modal */
.sig-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(249, 249, 246, 0.95);
  backdrop-filter: blur(4px);
  z-index: 50000;
  align-items: center;
  justify-content: center;
}

.sig-modal.open {
  display: flex;
}

.sig-modal-inner {
  background: var(--alabaster);
  border: 1px solid var(--charcoal);
  padding: 40px;
  max-width: 600px;
  width: 90%;
}

.sig-canvas {
  width: 100%;
  height: 160px;
  background: radial-gradient(
    circle,
    rgba(26, 26, 26, 0.12) 1px,
    transparent 1px
  );
  background-size: 24px 24px;
  background-color: #fff;
  border: 1px solid var(--gray-draft);
  touch-action: none;
}

.sig-modal-btns {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.sig-modal-btns button {
  padding: 10px 24px;
  border: 1px solid var(--charcoal);
  background: var(--alabaster);
  color: var(--charcoal);
  font-family: var(--font-sans);
  font-size: var(--text-small);
  font-weight: 600;
  cursor: pointer;
}

.sig-modal-btns button.primary {
  background: var(--charcoal);
  color: var(--alabaster);
}

.btn-hint {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.5;
  text-align: center;
  transition: opacity 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-hint.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.confirm-status {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: none;
}

.confirm-status.is-processing {
  display: block;
}

.confirm-status.is-processing::after {
  content: "█";
  animation: cursor-blink 800ms steps(2, end) infinite;
  margin-left: 4px;
  color: var(--orange-signal);
}

@keyframes cursor-blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

/* =============================================================================
 * FOOTER
 * ============================================================================= */

.proposal-footer {
  padding: var(--gutter) 0;
  border-top: 1px solid var(--gray-draft);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--text-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.6;
}

@media (max-width: 768px) {
  .proposal-footer {
    flex-direction: column;
    gap: 8px;
  }
}

/* =============================================================================
 * PRINT / PDF
 * ============================================================================= */

@media print {
  .scroll-progress,
  .sig-modal,
  .btn,
  .btn-hint,
  .confirm-status,
  .kinetic-bar {
    display: none !important;
  }
}