/* ============================================================
   Design Tokens
   ============================================================ */

:root {
  /* Light mode (default) */
  --color-bg: #f5f5f7;
  --color-surface: #ffffff;
  --color-surface-hover: #f0f0f5;
  --color-border: #d2d2d7;
  --color-border-hover: #adadb8;
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-accent: #0071e3;
  --color-accent-hover: #0077ed;
  --color-accent-text: #ffffff;
  --color-overlay: rgba(0, 0, 0, 0.5);
  --color-input-bg: #ffffff;
  --color-input-focus: #e8f0fb;
  --color-logo-bg: #e0e0e5;

  /* Status — light mode */
  --color-status-active-bg: #e6f4ee;
  --color-status-active-text: #1a7f4b;
  --color-status-active-border: #b3dfc9;
  --color-status-dev-bg: #fef9e7;
  --color-status-dev-text: #a67c00;
  --color-status-dev-border: #f5e0a0;
  --color-status-archived-bg: #f5f5f7;
  --color-status-archived-text: #6e6e73;
  --color-status-archived-border: #d2d2d7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1d1d1f;
    --color-surface: #2c2c2e;
    --color-surface-hover: #3a3a3c;
    --color-border: #3a3a3c;
    --color-border-hover: #545456;
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #98989d;
    --color-accent: #2997ff;
    --color-accent-hover: #3da0ff;
    --color-accent-text: #ffffff;
    --color-overlay: rgba(0, 0, 0, 0.7);
    --color-input-bg: #3a3a3c;
    --color-input-focus: #48484a;
    --color-logo-bg: #3a3a3c;

    /* Status — dark mode */
    --color-status-active-bg: #1a3a2a;
    --color-status-active-text: #4caf82;
    --color-status-active-border: #2d5a3f;
    --color-status-dev-bg: #2a2a1a;
    --color-status-dev-text: #c4a84f;
    --color-status-dev-border: #4a3f1a;
    --color-status-archived-bg: #2c2c2e;
    --color-status-archived-text: #98989d;
    --color-status-archived-border: #3a3a3c;
  }
}

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

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

body {
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100vh;
}

/* ============================================================
   Header
   ============================================================ */

.header {
  padding: 20px 0;
}

.logo-circle {
  width: 64px;
  height: 64px;
  background-color: var(--color-logo-bg);
  border-radius: 50%;
  margin: 0 auto;
  background-image: url('assets/clearpoint.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

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

.hero {
  padding: 40px 20px;
}

.hero h1 {
  font-size: 2.5rem;
  color: var(--color-text-primary);
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  margin-top: 10px;
}

/* ============================================================
   Placeholder Content
   ============================================================ */

.content {
  padding: 20px;
}

.placeholder-box {
  background-color: var(--color-surface);
  height: 300px;
  width: 90%;
  max-width: 800px;
  margin: 0 auto;
  border-radius: 10px;
}

/* ============================================================
   Call-to-Action
   ============================================================ */

.cta {
  margin: 40px 0;
}

.empty-button {
  width: 150px;
  height: 50px;
  background-color: var(--color-accent);
  color: var(--color-accent-text);
  border: none;
  border-radius: 25px;
  cursor: pointer;
  opacity: 0.9;
  transition:
    opacity 0.2s ease,
    background-color 0.2s ease;
}

.empty-button:hover {
  opacity: 1;
  background-color: var(--color-accent-hover);
}

/* ============================================================
   Modal
   ============================================================ */

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-overlay);
  justify-content: center;
  align-items: center;
}

.modal-content {
  background-color: var(--color-surface);
  padding: 20px;
  border-radius: 8px;
  width: 90%;
  max-width: 500px;
  text-align: left;
  color: var(--color-text-primary);
}

.close-button {
  font-size: 1.5rem;
  color: var(--color-text-primary);
  cursor: pointer;
  float: right;
}

/* ============================================================
   Form Styles
   ============================================================ */

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

input,
textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: 5px;
  background-color: var(--color-input-bg);
  color: var(--color-text-primary);
  font-size: 1rem;
  font-family: inherit;
}

textarea {
  resize: none;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: var(--color-input-focus);
}

/* Contact Form */
#contact-form-wrapper {
  max-width: 560px;
  margin: 0 auto;
  text-align: left;
}

.submit-button {
  width: 100%;
  padding: 10px;
  background-color: var(--color-accent);
  color: var(--color-accent-text);
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1rem;
  font-family: inherit;
  transition: background-color 0.2s ease;
}

.submit-button:hover {
  background-color: var(--color-accent-hover);
}

.form-status {
  margin-top: 10px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  text-align: center;
}

/* ============================================================
   Project Landing Page
   ============================================================ */

.project-status {
  display: inline-block;
  font-size: 0.55rem;
  font-weight: normal;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  vertical-align: middle;
  margin-left: 12px;
  position: relative;
  top: -4px;
}

.status-active {
  background-color: var(--color-status-active-bg);
  color: var(--color-status-active-text);
  border: 1px solid var(--color-status-active-border);
}

.status-in-development {
  background-color: var(--color-status-dev-bg);
  color: var(--color-status-dev-text);
  border: 1px solid var(--color-status-dev-border);
}

.status-archived {
  background-color: var(--color-status-archived-bg);
  color: var(--color-status-archived-text);
  border: 1px solid var(--color-status-archived-border);
}

/* Landing Page Sections */
.project-content > div {
  max-width: 860px;
  margin: 0 auto 48px;
  text-align: left;
  padding: 0 20px;
}

.project-content h2 {
  font-size: 1.2rem;
  color: var(--color-text-primary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
  margin-bottom: 20px;
}

.project-content h3 {
  font-size: 1rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  margin: 24px 0 12px;
}

.project-content p {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.project-content p + p {
  margin-top: 16px;
}

/* ============================================================
   Projects Page
   ============================================================ */

.project-header {
  padding: 40px 20px 20px;
}

.project-header-title {
  font-size: 2rem;
  color: var(--color-text-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.project-header-description {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

/* Filter Buttons */
.project-filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 16px 20px;
}

.project-filter button {
  padding: 8px 24px;
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.9rem;
  font-family: inherit;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.project-filter button:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-text);
  border-color: var(--color-accent);
}

.project-filter button.active {
  background-color: var(--color-accent);
  color: var(--color-accent-text);
  border-color: var(--color-accent);
}

/* Project List */
.project-content {
  padding: 20px;
  flex: 1;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
  text-align: left;
}

/* Project Card */
.project-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease;
}

.project-card:hover {
  border-color: var(--color-accent);
}

.project-name {
  font-size: 1.1rem;
  color: var(--color-text-primary);
  letter-spacing: 0.03em;
}

.project-description {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  flex: 1;
}

.learn-more-link {
  font-size: 0.85rem;
  color: var(--color-accent);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: color 0.2s ease;
  align-self: center;
}

.learn-more-link:hover {
  color: var(--color-accent-hover);
}

/* Back Button */
.back-button-wrapper {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1100px;
  pointer-events: none;
  z-index: 100;
  padding: 0 20px 0 13px;
  text-align: left;
}

.back-button {
  display: inline-block;
  pointer-events: auto;
  color: var(--color-border-hover);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 6px;
  line-height: 0;
  text-decoration: none;
  opacity: 0.85;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    opacity 0.2s ease,
    box-shadow 0.2s ease;
}

.back-button:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  opacity: 1;
}

/* ============================================================
   Mermaid Diagrams
   ============================================================ */

.mermaid {
  max-width: 100%;
  overflow-x: auto;
}

.mermaid svg {
  max-width: 100%;
  height: auto;
}

.mermaid:not([data-processed]) {
  visibility: hidden;
}

/* Diagram expand overlay */
.diagram-wrapper {
  position: relative;
}

.diagram-expand {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  color: var(--color-border-hover);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 4px;
  line-height: 0;
  opacity: 0.85;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    opacity 0.2s ease,
    box-shadow 0.2s ease;
}

.diagram-expand:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  opacity: 1;
}

@media (min-width: 960px) {
  .diagram-expand {
    right: 0;
    transform: translateX(calc(100% + 8px));
  }
}

/* Mermaid diagram containers */
#project-component-diagram,
#project-sequence-diagram-1,
#project-sequence-diagram-2,
#project-sequence-diagram-3 {
  display: block;
  width: 100%;
}

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

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--color-text-primary);
  transition: border-color 0.15s;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.submit-button {
  margin-top: 8px;
  padding: 10px 24px;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}

.submit-button:hover {
  opacity: 0.85;
}

.form-error {
  font-size: 0.875rem;
  color: #e53e3e;
  background: color-mix(in srgb, #e53e3e 10%, var(--color-bg));
  border: 1px solid color-mix(in srgb, #e53e3e 30%, transparent);
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 16px;
}

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

.footer {
  padding: 20px 0;
}

.line {
  height: 1px;
  background-color: var(--color-border);
  width: 80%;
  margin: 0 auto;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: 10px;
}