/* SPDX-License-Identifier: LicenseRef-DeepResearch-SaaS-Proprietary */
/*
 * CiteProof Footer Stylesheet
 * Large-wordmark footer ported from shadcn/ui to plain HTML and CSS.
 * Adheres to DESIGN.md and tokens.css. All rules scoped under .cp-footer.
 */

.cp-footer {
  background-color: var(--cp-canvas-soft);
  border-top: none;
  padding-top: var(--cp-space-12, 48px);
  padding-bottom: 0;
  overflow: hidden;
  position: relative;
  color: var(--cp-body);
  font-family: var(--cp-font-sans);
}

/* Container helper (self-contained fallback for .cp-container) */
.cp-footer .cp-container {
  width: 100%;
  max-width: var(--cp-max-width, 1200px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--cp-gutter, 24px);
  padding-right: var(--cp-gutter, 24px);
  box-sizing: border-box;
}

/* Top row: desktop side by side (space between), mobile stacked */
.cp-footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--cp-space-12, 48px);
}

/* Left block: brand, tagline, action button, copyright */
.cp-footer-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--cp-space-4, 16px);
  max-width: 320px;
  flex-shrink: 0;
}

.cp-footer-brand-heading {
  margin: 0;
  font-family: var(--cp-font-sans);
  font-size: 18px;
  font-weight: 600;
  line-height: 24px;
  letter-spacing: -0.3px;
}

.cp-footer-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--cp-space-2, 8px);
  color: var(--cp-ink);
  text-decoration: none;
}

.cp-footer-logo {
  width: 32px;
  height: 32px;
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.cp-footer-brand-name {
  font-family: var(--cp-font-sans);
  font-size: 18px;
  font-weight: 600;
  line-height: 24px;
  color: var(--cp-ink);
}

.cp-footer-tagline {
  margin: 0;
  font-family: var(--cp-font-sans);
  font-size: 14px;
  line-height: 20px;
  color: var(--cp-muted);
}

/* Shadcn-style secondary outline button */
.cp-footer-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 var(--cp-space-4, 16px);
  border-radius: var(--cp-radius-pill, 100px);
  font-family: var(--cp-font-sans);
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  color: var(--cp-ink);
  background-color: var(--cp-canvas-soft-2);
  border: none;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--cp-dur, 150ms) var(--cp-ease, cubic-bezier(0.2, 0, 0, 1)),
              color var(--cp-dur, 150ms) var(--cp-ease, cubic-bezier(0.2, 0, 0, 1)),
              transform var(--cp-dur, 150ms) var(--cp-ease, cubic-bezier(0.2, 0, 0, 1));
}

.cp-footer-btn:hover {
  background-color: var(--cp-canvas);
  color: var(--cp-ink);
}

.cp-footer-btn:active {
  transform: scale(0.98);
}

.cp-footer-copyright {
  margin: 0;
  font-family: var(--cp-font-mono);
  font-size: 12px;
  line-height: 16px;
  color: var(--cp-muted);
}

/* Right block: link lists grid */
.cp-footer-right {
  flex: 1;
  max-width: 720px;
}

.cp-footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--cp-space-8, 32px);
}

.cp-footer-nav {
  display: flex;
  flex-direction: column;
}

.cp-footer-heading {
  margin: 0 0 var(--cp-space-3, 12px) 0;
  font-family: var(--cp-font-sans);
  font-size: 14px;
  line-height: 20px;
  font-weight: 600;
  letter-spacing: -0.1px;
  color: var(--cp-ink);
}

.cp-footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--cp-space-2, 8px);
}

.cp-footer-links li {
  margin: 0;
  padding: 0;
}

.cp-footer-links a {
  display: inline-block;
  font-family: var(--cp-font-sans);
  font-size: 14px;
  line-height: 20px;
  color: var(--cp-muted);
  text-decoration: none;
  transition: color var(--cp-dur, 150ms) var(--cp-ease, cubic-bezier(0.2, 0, 0, 1));
}

.cp-footer-links a:hover {
  color: var(--cp-ink);
}

/* Accessible focus ring (2px ink outline, 2px offset) */
.cp-footer a:focus-visible,
.cp-footer button:focus-visible {
  outline: 2px solid var(--cp-ink);
  outline-offset: 2px;
}

/* Large wordmark section */
.cp-footer-wordmark-wrap {
  position: relative;
  width: 100%;
  margin-top: var(--cp-space-12, 48px);
  text-align: center;
  overflow: hidden;
  line-height: 0.9;
  pointer-events: none;
}

/* Subtle accent glow behind wordmark (single radial gradient <= 8% opacity) */
.cp-footer-wordmark-wrap::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(800px, 90%);
  height: 120px;
  background: radial-gradient(ellipse 60% 80px at 50% 100%, rgba(82, 168, 255, 0.06), transparent 70%);
  background: radial-gradient(ellipse 60% 80px at 50% 100%, color-mix(in srgb, var(--cp-link) 6%, transparent), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

html.light-mode .cp-footer-wordmark-wrap::before {
  background: radial-gradient(ellipse 60% 80px at 50% 100%, rgba(0, 112, 243, 0.04), transparent 70%);
  background: radial-gradient(ellipse 60% 80px at 50% 100%, color-mix(in srgb, var(--cp-link) 4%, transparent), transparent 70%);
}

.cp-footer-wordmark {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  text-align: center;
  font-family: var(--cp-font-sans);
  font-size: clamp(3rem, 16vw, 13rem);
  font-weight: 600;
  line-height: 0.9;
  letter-spacing: -0.04em;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  text-decoration: none;
  margin: 0 0 -0.05em 0;
  padding: 0;

  /* Dark mode gradient: mid-tone ink (~35%) fading to transparent at bottom */
  background-image: linear-gradient(180deg, rgba(237, 237, 237, 0.45) 0%, rgba(237, 237, 237, 0) 100%);
  background-image: linear-gradient(180deg, color-mix(in srgb, var(--cp-ink) 45%, transparent) 0%, transparent 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* Light mode gradient: ink (~80%) fading to faint ink (~5%) at bottom */
html.light-mode .cp-footer-wordmark {
  background-image: linear-gradient(180deg, rgba(23, 23, 23, 0.8) 0%, rgba(23, 23, 23, 0.05) 100%);
  background-image: linear-gradient(180deg, color-mix(in srgb, var(--cp-ink) 80%, transparent) 0%, color-mix(in srgb, var(--cp-ink) 5%, transparent) 100%);
}

/* Reduced motion and no-JS resilience */
@media (prefers-reduced-motion: reduce) {
  .cp-footer .scroll-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* Responsive: tablet and mobile */
@media (max-width: 960px) {
  .cp-footer-top {
    flex-direction: column;
    gap: var(--cp-space-8, 32px);
  }

  .cp-footer-left {
    max-width: 100%;
  }

  .cp-footer-right {
    max-width: 100%;
    width: 100%;
  }
}

@media (max-width: 600px) {
  .cp-footer .cp-container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .cp-footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--cp-space-8, 32px);
  }

  .cp-footer-wordmark-wrap {
    margin-top: var(--cp-space-8, 32px);
  }
}