/* ===================================================================
   TOSS DESIGN SYSTEM — Applied to Marketer Jang Sanggyun Portfolio
   Based on Toss Business (toss.im/business) design language
   Primary: #2972e8 | Radius-card: 32px | Subtle shadows
   =================================================================== */

/* ——— Toss Color Tokens ——— */
:root {
  --tds-blue-50:  #ebf2ff;
  --tds-blue-100: #d6e5ff;
  --tds-blue-200: #adc9ff;
  --tds-blue-300: #80abff;
  --tds-blue-400: #5590ff;
  --tds-blue-500: #3578f7;
  --tds-blue-600: #2972e8;  /* Primary */
  --tds-blue-700: #1c5fd4;
  --tds-blue-800: #1450be;
  --tds-blue-900: #0e3fa5;

  --tds-gray-50:  #f6f7f9;
  --tds-gray-100: #eef0f4;
  --tds-gray-200: #e1e4eb;
  --tds-gray-300: #c8cdd8;
  --tds-gray-400: #9ea6b8;
  --tds-gray-500: #6e7a93;
  --tds-gray-600: #4e5a73;
  --tds-gray-700: #3a4459;
  --tds-gray-800: #2b3348;
  --tds-gray-900: #1c1f25;

  --font-sans: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Apple SD Gothic Neo", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Toss border-radius scale */
  --radius-xs:   4px;
  --radius-sm:   8px;
  --radius-md:   14px;   /* buttons */
  --radius-lg:   32px;   /* cards (Toss signature) */
  --radius-full: 9999px; /* pills */

  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* --------------------------------------------------
   DARK THEME — Toss Dark
   -------------------------------------------------- */
[data-theme="dark"] {
  --bg-canvas:          #121318;
  --bg-surface:         #1c1f25;
  --bg-surface-elevated:#252930;
  --bg-subtle:          #2d313a;

  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-focus:  var(--tds-blue-400);

  --text-main:  #f6f7f9;
  --text-muted: #9ea6b8;
  --text-faint: #6e7a93;

  --accent-primary:    var(--tds-blue-500);
  --accent-secondary:  #818cf8;
  --accent-badge-bg:   rgba(41, 114, 232, 0.15);
  --accent-badge-text: var(--tds-blue-300);

  /* Toss-style subtle shadows */
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-card:   0 8px 32px -4px rgba(0, 0, 0, 0.45);
  --shadow-modal:  0 24px 56px -8px rgba(0, 0, 0, 0.75);

  --navbar-bg:      rgba(18, 19, 24, 0.88);
  --modal-backdrop: rgba(0, 0, 0, 0.72);
}

/* --------------------------------------------------
   LIGHT THEME — Toss Light
   -------------------------------------------------- */
[data-theme="light"] {
  --bg-canvas:          var(--tds-gray-50);   /* #f6f7f9 */
  --bg-surface:         #ffffff;
  --bg-surface-elevated:var(--tds-gray-100);  /* #eef0f4 */
  --bg-subtle:          var(--tds-gray-200);  /* #e1e4eb */

  --border-subtle: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.11);
  --border-focus:  var(--tds-blue-600);

  --text-main:  var(--tds-gray-900);  /* #1c1f25 */
  --text-muted: var(--tds-gray-500);  /* #6e7a93 */
  --text-faint: var(--tds-gray-400);  /* #9ea6b8 */

  --accent-primary:    var(--tds-blue-600);  /* #2972e8 */
  --accent-secondary:  #4f46e5;
  --accent-badge-bg:   var(--tds-blue-50);   /* #ebf2ff */
  --accent-badge-text: var(--tds-blue-700);  /* #1c5fd4 */

  /* Toss-style feather shadows */
  --shadow-subtle: 0 2px 8px -1px rgba(0, 0, 0, 0.04);
  --shadow-card:   0 8px 24px -4px rgba(0, 0, 0, 0.07);
  --shadow-modal:  0 20px 48px -8px rgba(28, 31, 37, 0.18);

  --navbar-bg:      rgba(246, 247, 249, 0.90);
  --modal-backdrop: rgba(28, 31, 37, 0.42);
}

/* ===================================================================
   BASE TYPOGRAPHY & RESET
   =================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  background-color: var(--bg-canvas);
  color: var(--text-main);
  line-height: 1.65;
}

body {
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

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

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* ===================================================================
   NAVIGATION BAR
   =================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 68px;
  background: var(--navbar-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: all var(--transition-fast);
}

.nav-container {
  max-width: 1140px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-accent {
  font-weight: 900;
  color: var(--accent-primary);
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-main);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  color: var(--text-main);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  font-size: 1.2rem;
  color: var(--text-main);
  padding: 6px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: all var(--transition-fast);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(41, 114, 232, 0.28);
}

.btn-primary:hover {
  background: var(--tds-blue-700);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(41, 114, 232, 0.38);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: 0 2px 8px rgba(41, 114, 232, 0.22);
}

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

.btn-secondary:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

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

/* ===================================================================
   HERO SECTION
   =================================================================== */
.hero-section {
  padding-top: 140px;
  padding-bottom: 72px;
  position: relative;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: center;
  gap: 56px;
  margin-bottom: 64px;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  background: var(--accent-badge-bg);
  color: var(--accent-badge-text);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 22px;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.6);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(56, 189, 248, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(56, 189, 248, 0); }
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.035em;
  color: var(--text-main);
  margin-bottom: 20px;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 28px;
  max-width: 580px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 34px;
}

.chip {
  padding: 5px 11px;
  border-radius: var(--radius-xs);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Profile Card */
.profile-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
}

.profile-image-wrapper {
  position: relative;
  width: 154px;
  height: 154px;
  border-radius: 50%;
  margin-bottom: 18px;
  padding: 4px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
}

.profile-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-canvas);
}

.profile-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.profile-en {
  font-size: 0.88rem;
  font-weight: 400;
  color: var(--text-faint);
}

.profile-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.profile-quick-contact {
  display: flex;
  gap: 8px;
}

.profile-quick-contact a,
.profile-quick-contact button {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.profile-quick-contact a:hover,
.profile-quick-contact button:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  transform: translateY(-1px);
}

/* Stats Counter Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow-subtle);
}

.stat-card {
  text-align: center;
  position: relative;
}

.stat-card:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 15%;
  right: 0;
  height: 70%;
  width: 1px;
  background: var(--border-subtle);
}

.stat-number {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent-primary);
  line-height: 1.1;
  margin-bottom: 6px;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 3px;
}

.stat-desc {
  font-size: 0.8rem;
  color: var(--text-faint);
}

/* ===================================================================
   SECTION HEADERS
   =================================================================== */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px auto;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  margin-bottom: 10px;
}

.section-title {
  font-size: 2.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===================================================================
   ABOUT SECTION
   =================================================================== */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.philosophy-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.philosophy-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-card);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-badge-bg);
  color: var(--accent-badge-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.philosophy-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.philosophy-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.card-footer-note {
  font-size: 0.82rem;
  color: var(--accent-badge-text);
  background: var(--accent-badge-bg);
  padding: 10px 14px;
  border-radius: var(--radius-xs);
  border-left: 2px solid var(--accent-primary);
  line-height: 1.5;
}

/* ===================================================================
   SKILLS & COMPETENCIES
   =================================================================== */
.skills-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 36px;
}

.skill-category {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 1.15rem;
  color: var(--accent-primary);
}

.category-header h3 {
  color: var(--text-main);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.skill-name {
  font-weight: 600;
  font-size: 0.92rem;
}

.skill-rating {
  font-size: 0.82rem;
  color: var(--accent-primary);
  font-weight: 600;
  font-family: var(--font-mono);
}

.progress-bar {
  height: 6px;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 5px;
}

.progress-fill {
  height: 100%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: width 0.8s ease;
}

.skill-desc {
  font-size: 0.78rem;
  color: var(--text-faint);
}

.credentials-box {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.credential-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 18px;
}

.credential-icon {
  font-size: 1.3rem;
  color: var(--accent-primary);
  margin-top: 2px;
}

.credential-item strong {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 3px;
}

.credential-item p {
  font-size: 0.78rem;
  color: var(--text-faint);
  line-height: 1.5;
}

/* ===================================================================
   PROJECTS SECTION
   =================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-card);
}

.project-image-box {
  position: relative;
  height: 190px;
  overflow: hidden;
  background: var(--bg-subtle);
}

.project-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .project-thumb {
  transform: scale(1.03);
}

.project-placeholder-box {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-surface-elevated);
}

.placeholder-graphic {
  text-align: center;
  color: var(--accent-primary);
}

.placeholder-graphic i {
  font-size: 2.6rem;
  margin-bottom: 8px;
  display: block;
}

.placeholder-graphic span {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 13, 22, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  backdrop-filter: blur(4px);
  transition: opacity var(--transition-fast);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.overlay-btn {
  background: var(--accent-primary);
  color: #ffffff;
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
}

.project-info {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 12px;
}

.tag {
  font-size: 0.74rem;
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.tag-accent {
  background: var(--accent-badge-bg);
  color: var(--accent-badge-text);
  border-color: rgba(56, 189, 248, 0.25);
  font-weight: 600;
}

.project-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.project-summary {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.project-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 10px;
  text-align: center;
  margin-bottom: 16px;
}

.metric-val {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--accent-primary);
  font-variant-numeric: tabular-nums;
}

.metric-lbl {
  font-size: 0.72rem;
  color: var(--text-faint);
}

.project-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-subtle);
  padding-top: 14px;
  font-size: 0.82rem;
}

.project-date {
  color: var(--text-faint);
  font-family: var(--font-mono);
}

.text-link {
  color: var(--accent-primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===================================================================
   STORY / COVER LETTER ACCORDION
   =================================================================== */
.story-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 820px;
  margin: 0 auto;
}

.story-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.story-item:hover {
  border-color: var(--border-medium);
}

.story-header {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  color: var(--text-main);
}

.story-num {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: var(--font-mono);
}

.story-title {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  flex-grow: 1;
}

.story-icon {
  font-size: 0.9rem;
  color: var(--text-faint);
  transition: transform var(--transition-fast);
}

.story-item.active .story-icon {
  transform: rotate(180deg);
  color: var(--accent-primary);
}

.story-body {
  padding: 0 24px 22px 58px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.75;
  display: none;
}

.story-item.active .story-body {
  display: block;
}

.story-body p:not(:last-child) {
  margin-bottom: 12px;
}

/* ===================================================================
   TIMELINE SECTION
   =================================================================== */
.timeline {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 6px;
  width: 2px;
  background: var(--border-subtle);
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 3px solid var(--bg-canvas);
}

.timeline-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: transform var(--transition-fast);
}

.timeline-content:hover {
  transform: translateX(3px);
  border-color: var(--border-medium);
}

.timeline-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-size: 0.74rem;
  font-weight: 600;
  background: var(--bg-subtle);
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.badge-award {
  background: rgba(234, 179, 8, 0.12);
  color: #eab308;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 3px;
}

.timeline-date {
  display: block;
  font-size: 0.82rem;
  color: var(--text-faint);
  font-family: var(--font-mono);
  margin-bottom: 10px;
}

.timeline-list {
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.timeline-desc {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ===================================================================
   CONTACT SECTION
   =================================================================== */
.contact-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 52px 36px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.contact-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-badge-bg);
  color: var(--accent-badge-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.contact-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 5px;
}

.contact-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  word-break: break-all;
}

.contact-btn-group {
  display: flex;
  gap: 6px;
  margin-top: auto;
}

/* ===================================================================
   FOOTER
   =================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 28px 0;
  font-size: 0.82rem;
  color: var(--text-faint);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  color: var(--text-muted);
  font-weight: 500;
}

.back-to-top {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.back-to-top:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* ===================================================================
   PROJECT DETAIL MODAL
   =================================================================== */
.project-modal {
  border: none;
  background: transparent;
  padding: 0;
  margin: auto;
  max-width: 760px;
  width: 90%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  overflow: hidden;
}

.project-modal::backdrop {
  background: var(--modal-backdrop);
  backdrop-filter: blur(8px);
}

.modal-content {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 34px;
  max-height: 85vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
}

.modal-header {
  margin-bottom: 22px;
  padding-right: 36px;
}

.modal-category {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 5px;
  font-family: var(--font-mono);
}

.modal-title {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.3;
  margin-bottom: 8px;
}

.modal-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 26px;
  border: 1px solid var(--border-subtle);
}

.modal-meta-item strong {
  display: block;
  font-size: 0.72rem;
  color: var(--text-faint);
  margin-bottom: 2px;
}

.modal-meta-item span {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
}

.modal-section {
  margin-bottom: 24px;
}

.modal-section h4 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-main);
}

.modal-section h4 i {
  color: var(--accent-primary);
  font-size: 0.95rem;
}

.modal-section p {
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.92rem;
  margin-bottom: 10px;
}

.modal-list {
  padding-left: 18px;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.92rem;
}

.modal-list li {
  margin-bottom: 6px;
}

.modal-download-box {
  background: var(--bg-surface-elevated);
  border: 1px dashed var(--border-medium);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 22px;
}

.download-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.download-info i {
  font-size: 1.8rem;
  color: #ea580c;
}

/* ===================================================================
   TOAST NOTIFICATION
   =================================================================== */
.toast {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: #0f172a;
  color: #f8fafc;
  border: 1px solid var(--border-medium);
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-card);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
  z-index: 1000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ===================================================================
   RESPONSIVE DESIGN
   =================================================================== */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 36px;
  }
  .hero-visual {
    order: -1;
  }
  .hero-badges,
  .hero-buttons {
    justify-content: center;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-card:nth-child(2)::after {
    display: none;
  }
  .philosophy-grid,
  .projects-grid,
  .skills-wrapper,
  .credentials-box,
  .contact-cards {
    grid-template-columns: 1fr;
  }
  .modal-meta-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 20px 24px;
    gap: 14px;
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .menu-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2.15rem;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .stat-card::after {
    display: none !important;
  }
  .modal-content {
    padding: 22px 16px;
  }
}