/* ==========================================================================
   Design System & Styling: Portfolio Amru Abbay
   Sesuai panduan DESIGN.md dan prinsip craftmanship antislop
   ========================================================================== */

:root {
  /* Dark mode (Default) */
  --bg-primary: #12151a;
  --bg-surface: #1a202c;
  --bg-surface-elevated: #242c3d;
  --border-subtle: #2d3748;
  --border-interactive: #718096;
  --text-primary: #f0f3f6;
  --text-muted: #9aa5b5;
  --accent: #2dd4bf;
  --accent-contrast: #0f172a;
  --tag-bg: #242c3d;
  --tag-text: #e2e8f0;
  --focus-ring: #2dd4bf;
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);

  /* Fluid typography */
  --font-family-base: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --text-xs: clamp(0.75rem, 0.72rem + 0.2vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.08rem + 0.35vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.18rem + 0.5vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.38rem + 0.7vw, 1.875rem);
  --text-3xl: clamp(1.875rem, 1.7rem + 1vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 2rem + 1.4vw, 3rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --section-py: clamp(3rem, 6vw, 5.5rem);
  --container-max: 1080px;
  --container-px: clamp(1.25rem, 4vw, 2rem);

  /* Shape tokens */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Motion */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;

  color-scheme: dark;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --border-subtle: #e2e8f0;
  --border-interactive: #64748b;
  --text-primary: #0f172a;
  --text-muted: #475569;
  --accent: #0f766e;
  --accent-contrast: #ffffff;
  --tag-bg: #f1f5f9;
  --tag-text: #334155;
  --focus-ring: #0f766e;
  --card-shadow: 0 4px 12px rgba(15, 23, 42, 0.05);

  color-scheme: light;
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

/* Skip Link for Keyboard Accessibility */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--accent);
  color: var(--accent-contrast);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
}

/* Visible focus indicators for accessibility (R-32) */
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 3px;
}

/* ==========================================================================
   Layout Containers
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-px);
  padding-right: var(--container-px);
}

.section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

.section-bordered {
  border-top: 1px solid var(--border-subtle);
}

.section-header {
  margin-bottom: var(--space-10);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
  font-weight: 600;
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

.section-desc {
  margin-top: var(--space-3);
  font-size: var(--text-lg);
  color: var(--text-muted);
  max-width: 65ch;
}

/* ==========================================================================
   Site Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--text-primary);
  min-height: 44px;
  min-width: 44px;
}

.brand-badge {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  padding: 0.15rem 0.45rem;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-muted);
  padding: var(--space-2) var(--space-1);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-interactive);
  color: var(--text-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  background-color: var(--bg-surface);
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-surface-elevated);
}

.theme-toggle-icon {
  width: 1.125rem;
  height: 1.125rem;
  stroke: currentColor;
}

/* Mobile Menu Toggle Button */
.mobile-menu-btn {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-interactive);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: 600;
  background-color: var(--bg-surface);
}

.mobile-drawer {
  display: none;
}

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

.hero-section {
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.hero-intro {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 780px;
}

.hero-role {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-family-mono);
  font-size: var(--text-sm);
  color: var(--accent);
  font-weight: 600;
}

.hero-name {
  font-size: var(--text-4xl);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.hero-tagline {
  font-size: var(--text-xl);
  line-height: 1.5;
  color: var(--text-muted);
}

.hero-summary {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 68ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-2);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  min-height: 44px;
  min-width: 44px;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background-color: var(--accent);
  color: var(--accent-contrast);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-interactive);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-elevated);
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-10);
  align-items: start;
}

.about-story {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.75;
}

.about-story strong {
  color: var(--text-primary);
  font-weight: 600;
}

.qa-mindset-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--card-shadow);
}

.qa-mindset-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.qa-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.qa-point-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-3);
  border-left: 2px solid var(--accent);
}

.qa-point-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
}

.qa-point-desc {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

/* Skills Badges */
.skills-block {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skills-title {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-family-mono);
  color: var(--text-primary);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.skill-tag {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  padding: 0.35rem 0.65rem;
  background-color: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

/* ==========================================================================
   Projects Section (Different Treatments per R-14)
   ========================================================================== */

.projects-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

/* Project Card Base */
.project-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

/* Card 1: eBook Reader (Web Focus) */
.project-card-web {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.project-content {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-6);
}

.project-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  color: var(--accent);
  font-weight: 600;
}

.project-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: var(--space-2);
  margin-bottom: var(--space-3);
}

.project-desc {
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.65;
}

.project-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.project-highlight-item {
  font-size: var(--text-sm);
  color: var(--text-muted);
  position: relative;
  padding-left: 1.25rem;
}

.project-highlight-item::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

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

/* Project Visual Blueprint / Honest Placeholder (R-23, R-38) */
.project-visual {
  background-color: var(--bg-surface-elevated);
  border-left: 1px solid var(--border-subtle);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 320px;
}

.blueprint-mockup {
  border: 1px dashed var(--border-interactive);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.blueprint-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: var(--space-2);
}

.blueprint-title {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.blueprint-badge {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  padding: 0.15rem 0.4rem;
  background-color: var(--tag-bg);
  color: var(--accent);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.blueprint-preview-box {
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  padding: var(--space-4);
  background-color: var(--bg-primary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  gap: var(--space-2);
}

.blueprint-status-text {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.blueprint-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  margin-top: var(--space-2);
}

.blueprint-list-item {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.4rem 0.6rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
}

.blueprint-list-key {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
}

.blueprint-list-val {
  color: var(--text-muted);
  font-size: var(--text-xs);
}

/* Card 2: FitMeal (Mobile App Focus with Nutrients breakdown) */
.project-card-mobile {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
}

.mobile-preview-container {
  background-color: var(--bg-surface-elevated);
  border-right: 1px solid var(--border-subtle);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-mockup-frame {
  width: 100%;
  max-width: 280px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-interactive);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  box-shadow: var(--card-shadow);
}

.mobile-mockup-header {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: var(--space-2);
  color: var(--text-muted);
}

.tier-pills {
  display: flex;
  gap: var(--space-1);
}

.tier-pill {
  font-family: var(--font-family-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  background-color: var(--tag-bg);
  color: var(--tag-text);
  border: 1px solid var(--border-subtle);
}

.tier-pill.active {
  background-color: var(--accent);
  color: var(--accent-contrast);
  font-weight: 600;
  border-color: var(--accent);
}

.macro-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  padding: var(--space-2) 0;
}

.macro-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  text-align: center;
}

.macro-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-family: var(--font-family-mono);
}

.macro-val {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--text-primary);
}

.meal-times-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.meal-time-row {
  display: flex;
  justify-content: space-between;
  background-color: var(--bg-primary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

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

.contact-box {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 3.5rem);
  box-shadow: var(--card-shadow);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 780px;
}

.contact-lead {
  font-size: var(--text-lg);
  color: var(--text-primary);
  line-height: 1.6;
}

.contact-channels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  border: 1px solid var(--border-interactive);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  min-height: 44px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.contact-card:hover {
  border-color: var(--accent);
  background-color: var(--bg-surface-elevated);
}

.contact-card-label {
  font-family: var(--font-family-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
}

.contact-card-value {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
  word-break: break-all;
}

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

.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.footer-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-nav {
  display: flex;
  gap: var(--space-4);
  list-style: none;
}

.footer-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--text-primary);
}

/* ==========================================================================
   Mobile & Responsive Queries (R-03, Layoutmobile)
   ========================================================================== */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .project-card-web,
  .project-card-mobile {
    grid-template-columns: 1fr;
  }

  .project-visual {
    border-left: none;
    border-top: 1px solid var(--border-subtle);
  }

  .mobile-preview-container {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
  }
}

/* Mobile Breakpoint (< 768px) */
@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  /* Full screen Mobile Navigation Drawer */
  .mobile-drawer {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    z-index: 200;
    padding: var(--space-6) var(--container-px);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
    overflow-y: auto;
  }

  .mobile-drawer.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border-subtle);
  }

  .mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-8);
  }

  .mobile-nav-link {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    padding: var(--space-3) 0;
    min-height: 44px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
  }

  .mobile-drawer-actions {
    margin-top: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .contact-channels {
    grid-template-columns: 1fr;
  }

  .footer-wrapper {
    flex-direction: column;
    align-items: flex-start;
  }
}