/* ============================================================
   styles.css — Portfolio by Jayvee C. Dela Rosa
   ============================================================ */


/* ============================================================
   CSS CUSTOM PROPERTIES — DARK MODE (DEFAULT)
   ============================================================ */
:root {
  --bg:           #0f1117;
  --bg2:          #161b27;
  --bg3:          #1c2233;
  --surface:      #1e2535;
  --surface2:     #242d42;
  --surface3:     #2a3450;
  --border:       rgba(255, 255, 255, 0.07);
  --border2:      rgba(255, 255, 255, 0.14);
  --border3:      rgba(255, 255, 255, 0.22);
  --accent:       #e8891a;
  --accent-dim:   rgba(232, 137, 26, 0.12);
  --accent-glow:  rgba(232, 137, 26, 0.25);
  --blue:         #4a90d9;
  --blue-dim:     rgba(74, 144, 217, 0.12);
  --teal:         #2eb5a5;
  --teal-dim:     rgba(46, 181, 165, 0.12);
  --red:          #e5534b;
  --text:         #e8eaf0;
  --text2:        #9ba3b8;
  --text3:        #5c6478;
  --heading:      #f0f2f7;
  --nav-w:        220px;
  --topnav-h:     48px;
  --radius:       6px;
  --radius-lg:    8px;
  --shadow:       0 1px 4px rgba(0, 0, 0, 0.3);
  --shadow-lg:    0 4px 16px rgba(0, 0, 0, 0.4);
  --transition:   0.18s ease;
  --font:         'IBM Plex Sans', -apple-system, sans-serif;
  --mono:         'IBM Plex Mono', monospace;
}


/* ============================================================
   LIGHT MODE
   ============================================================ */
body.light {
  --bg:           #f2f3f3;
  --bg2:          #ffffff;
  --bg3:          #fafafa;
  --surface:      #ffffff;
  --surface2:     #f7f8fa;
  --surface3:     #eef0f4;
  --border:       rgba(0, 0, 0, 0.09);
  --border2:      rgba(0, 0, 0, 0.14);
  --border3:      rgba(0, 0, 0, 0.22);
  --accent:       #c45a00;
  --accent-dim:   rgba(196, 90, 0, 0.08);
  --accent-glow:  rgba(196, 90, 0, 0.2);
  --blue:         #0972d3;
  --blue-dim:     rgba(9, 114, 211, 0.08);
  --teal:         #007d69;
  --teal-dim:     rgba(0, 125, 105, 0.08);
  --text:         #0d1117;
  --text2:        #414d5c;
  --text3:        #7d8998;
  --heading:      #000716;
  --shadow:       0 1px 4px rgba(0, 0, 0, 0.1);
  --shadow-lg:    0 4px 16px rgba(0, 0, 0, 0.12);
}


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


html {
  font-size: 14.5px;
}


body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
}


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


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


button {
  font-family: var(--font);
  cursor: pointer;
  background: none;
  border: none;
}


/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }


/* ============================================================
   TOP UTILITY BAR
   ============================================================ */
#topbar-util {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 36px;
  background: #232f3e;
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 10px;
  z-index: 2000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}


body.light #topbar-util {
  background: #161e2d;
}


.util-logo {
  font-family: var(--font);
  font-weight: 700;
  font-size: 1.05rem;
  color: #ff9900;
  letter-spacing: -0.02em;
  margin-right: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}


.util-logo i {
  font-size: 0.9rem;
}


.util-services {
  display: flex;
  align-items: center;
  gap: 4px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: default;
  white-space: nowrap;
}


.util-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 2px;
  position: relative;
}


.util-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.75rem;
  border-radius: 3px;
  transition: background var(--transition);
  white-space: nowrap;
  position: relative;
  background: transparent;
  border: none;
}


.util-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}


.util-btn i {
  font-size: 0.75rem;
}


/* User button separator */
.util-btn--user {
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  padding-left: 12px;
  margin-left: 4px;
}


.util-chevron {
  font-size: 0.6rem !important;
}


/* ============================================================
   NOTIFICATION SYSTEM
   ============================================================ */
.notif-indicator {
  position: absolute;
  top: 2px;
  right: 6px;
  width: 7px;
  height: 7px;
  background: var(--red);
  border-radius: 50%;
  border: 1.5px solid #232f3e;
  pointer-events: none;
  transition: opacity 0.2s;
}


body.light .notif-indicator {
  border-color: #161e2d;
}


.notif-indicator.hidden {
  display: none;
}


/* Shared dropdown base */
.notif-dropdown,
.username-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 3000;
  overflow: hidden;
}


.notif-dropdown.open,
.username-dropdown.open {
  display: block;
}


.notif-dropdown {
  width: 300px;
}


.username-dropdown {
  width: 220px;
}


.notif-header,
.username-dd-header {
  padding: 10px 14px 8px;
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--heading);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}


.username-dd-header {
  color: var(--text3);
  letter-spacing: 0.06em;
}


.notif-item {
  padding: 12px 14px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  cursor: pointer;
  transition: background var(--transition);
}


.notif-item:hover {
  background: var(--surface2);
}


.notif-icon-wrap {
  width: 30px;
  height: 30px;
  border-radius: var(--radius);
  background: var(--accent-dim);
  border: 1px solid rgba(232, 137, 26, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}


.notif-icon-wrap i {
  color: var(--accent);
  font-size: 0.78rem;
}


.notif-content {
  flex: 1;
  min-width: 0;
}


.notif-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 2px;
}


.notif-msg {
  font-size: 0.75rem;
  color: var(--text2);
  line-height: 1.5;
  font-weight: 500;
}


.notif-time {
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text3);
  white-space: nowrap;
}


/* ============================================================
   USERNAME DROPDOWN
   ============================================================ */
.username-dd-body {
  padding: 12px 14px;
}


.username-dd-label {
  font-size: 0.73rem;
  color: var(--text2);
  margin-bottom: 6px;
}


.username-dd-input-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}


.username-dd-input {
  flex: 1;
  padding: 5px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.8rem;
  outline: none;
  transition: border-color var(--transition);
}


.username-dd-input:focus {
  border-color: var(--blue);
}


.username-dd-clear {
  width: 24px;
  height: 24px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text2);
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition);
  flex-shrink: 0;
}


.username-dd-clear:hover {
  border-color: var(--red);
  color: var(--red);
}


.username-dd-hint {
  margin-top: 6px;
  font-size: 0.68rem;
  font-family: var(--mono);
  color: var(--text3);
}


.username-dd-error {
  margin-top: 4px;
  font-size: 0.68rem;
  color: var(--red);
  font-family: var(--mono);
  display: none;
}


.username-dd-error.show {
  display: block;
}


/* ============================================================
   SIDEBAR (DESKTOP)
   ============================================================ */
#sidebar {
  position: fixed;
  left: 0;
  top: 36px;
  width: var(--nav-w);
  height: calc(100vh - 36px);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  overflow-y: auto;
  overflow-x: hidden;
}


.nav-section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  padding: 16px 16px 6px;
}


.nav-section-label--footer {
  padding: 0 0 8px;
}


.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  color: var(--text2);
  font-size: 0.83rem;
  font-weight: 400;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  border-left: 2px solid transparent;
  white-space: nowrap;
}


.nav-link i {
  font-size: 0.85rem;
  min-width: 16px;
  text-align: center;
  color: var(--text3);
  transition: color var(--transition);
}


.nav-link:hover {
  background: var(--surface3);
  color: var(--text);
}


.nav-link:hover i {
  color: var(--text2);
}


.nav-link.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 500;
}


.nav-link.active i {
  color: var(--accent);
}


.nav-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}


.sidebar-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding: 12px 16px;
}


.sidebar-region {
  font-size: 0.76rem;
  color: var(--text2);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
}


.sidebar-region i {
  color: var(--text3);
  font-size: 0.72rem;
}


.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text2);
  font-size: 0.78rem;
  padding: 6px 0;
  transition: color var(--transition);
  background: transparent;
  border: none;
}


.theme-toggle:hover {
  color: var(--text);
}


.theme-toggle i {
  font-size: 0.82rem;
  min-width: 16px;
}


/* ============================================================
   MOBILE TOP NAV
   ============================================================ */
#mobile-topnav {
  display: none;
  position: fixed;
  top: 36px;
  left: 0;
  right: 0;
  height: var(--topnav-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  z-index: 999;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}


#mobile-topnav::-webkit-scrollbar {
  display: none;
}


.mobile-nav-inner {
  display: flex;
  align-items: stretch;
  height: 100%;
  min-width: max-content;
  padding: 0 12px;
}


.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  color: var(--text2);
  font-size: 0.79rem;
  font-weight: 400;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition);
}


.mobile-nav-link i {
  font-size: 0.79rem;
}


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


.mobile-nav-link.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 500;
}


/* ============================================================
   MAIN LAYOUT
   ============================================================ */
#main {
  margin-left: var(--nav-w);
  margin-top: 36px;
  min-height: calc(100vh - 36px);
  position: relative;
}


/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  display: none;
  padding: 0 0 48px;
  min-height: calc(100vh - 36px);
  background: var(--bg);
  overflow-y: auto;
  overflow-x: hidden;
}


.section.active {
  display: block;
}


.section-inner {
  padding: 26px 30px 40px;
  max-width: 1200px;
}


/* ============================================================
   PAGE HEADER (BREADCRUMB)
   ============================================================ */
.page-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 12px;
}


.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.81rem;
  color: var(--text3);
}


.breadcrumb-sep {
  color: var(--text3);
}


.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
}


.page-actions {
  margin-left: auto;
  display: flex;
  gap: 8px;
  align-items: center;
}


.meta-count {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text3);
}


/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.81rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition), filter var(--transition), color var(--transition);
  white-space: nowrap;
  line-height: 1;
}


.btn i {
  font-size: 0.78rem;
}


/* Primary — solid orange */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}


.btn-primary:hover {
  filter: brightness(1.1);
}


/* Secondary / Ghost — blue outline (identical styles, one class) */
.btn-secondary,
.btn-ghost {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}


.btn-secondary:hover,
.btn-ghost:hover {
  background: var(--blue-dim);
}


/* Certificate button modifiers */
.cert-btn--view,
.cert-btn--full {
  flex: 1;
  justify-content: center;
}


.cert-btn--full {
  width: 100%;
}


/* Send button */
.btn--send {
  align-self: flex-start;
  padding: 8px 20px;
}


/* ============================================================
   SECTION HEADINGS
   ============================================================ */
.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--heading);
  text-align: center;
  margin-bottom: 4px;
}


.section-subtitle {
  font-size: 0.81rem;
  color: var(--text3);
  text-align: center;
  margin-bottom: 26px;
}


/* ============================================================
   PANEL / CARD BASE
   ============================================================ */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}


.panel-header {
  padding: 14px 20px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}


.panel-header__icon {
  color: var(--text3);
  font-size: 0.82rem;
}


.panel-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--heading);
  flex: 1;
}


.panel-body {
  padding: 22px;
}


.panel-body--centered {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 14px;
  padding: 28px 20px;
}


.panel-body--arch {
  padding: 24px 28px;
}


/* Status badge (Active) */
.status-badge {
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--teal);
  background: var(--teal-dim);
  padding: 2px 7px;
  border-radius: 3px;
  border: 1px solid rgba(46, 181, 165, 0.2);
}


/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 20px;
  align-items: start;
  max-width: 1000px;
}


.profile-avatar {
  width: 82px;
  height: 82px;
  border-radius: 50%;
  background: var(--surface3);
  border: 2px solid var(--border2);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}


.profile-avatar i {
  font-size: 2rem;
  color: var(--text3);
}


.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}


.profile-name {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.2;
}


.profile-role {
  font-family: var(--mono);
  font-size: 0.73rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  text-align: center;
}


.profile-email {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.79rem;
  color: var(--text2);
}


.profile-email i {
  color: var(--text3);
  font-size: 0.72rem;
}


.social-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}


.social-chip {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface2);
  font-size: 0.74rem;
  color: var(--text2);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}


.social-chip:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: var(--blue-dim);
}


.social-chip i {
  font-size: 0.8rem;
}


.profile-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
}


.about-right {
  display: flex;
  flex-direction: column;
  gap: 18px;
}


.overview-text {
  text-align: justify;
  font-size: 0.86rem;
  color: var(--text2);
  line-height: 1.85;
}


.interests-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}


.interest-item {
  padding: 16px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--blue);
  text-align: center;
  font-size: 0.76rem;
  color: var(--blue);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: background var(--transition);
  cursor: default;
}


.interest-item:hover {
  background: rgba(74, 144, 217, 0.2);
}


.interest-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: var(--surface3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--blue);
}


/* ============================================================
   PROJECTS SECTION
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 18px;
}


.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}


.project-card:hover {
  border-color: var(--border2);
  box-shadow: var(--shadow-lg);
}


.project-img-wrap {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 16 / 9;
  background: var(--bg3);
}


.project-img-wrap::after {
  content: 'Open Project';
  position: absolute;
  inset: 0;
  background: rgba(15, 17, 23, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  opacity: 0;
  transition: opacity var(--transition);
}


.project-img-wrap:hover::after,
.project-img-wrap:focus::after {
  opacity: 1;
}


.project-img-wrap:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}


.project-img-placeholder {
  width: 100%;
  height: 100%;
  background: var(--surface2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text3);
  position: relative;
}


.project-img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 20px 20px;
}


.project-img-placeholder i {
  position: relative;
  z-index: 1;
}


.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}


.project-img-wrap:hover .project-img {
  transform: scale(1.03);
}


.project-body {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}


.project-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--heading);
  margin: 0;
}


.project-desc {
  font-size: 0.81rem;
  color: var(--text2);
  line-height: 1.7;
  flex: 1;
  margin: 0;
}


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


.project-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 2px 8px;
  border-radius: 3px;
  background: var(--blue-dim);
  border: 1px solid rgba(74, 144, 217, 0.2);
  color: var(--blue);
  letter-spacing: 0.03em;
}


.project-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}


/* ============================================================
   CERTIFICATES SECTION
   ============================================================ */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}


.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}


.cert-card:hover {
  border-color: var(--border2);
  box-shadow: var(--shadow-lg);
}


.cert-img-wrap {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  background: var(--surface2);
}


.cert-img-wrap::after {
  content: 'View Certificate';
  position: absolute;
  inset: 0;
  background: rgba(15, 17, 23, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  color: var(--accent);
  font-family: var(--mono);
  letter-spacing: 0.06em;
  opacity: 0;
  transition: opacity var(--transition);
}

.cert-img-wrap--badge::after {
  content: 'View Badge';
}

.cert-img-wrap:hover::after,
.cert-img-wrap:focus::after {
  opacity: 1;
}


.cert-img-wrap:focus {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}


.cert-img-placeholder {
  width: 100%;
  height: 100%;
  background: var(--surface2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--text3);
  position: relative;
}


.cert-img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 12px,
    var(--border) 12px,
    var(--border) 13px
  );
}


.cert-img-placeholder i {
  position: relative;
  z-index: 1;
}


.cert-body {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}


.cert-name {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.4;
  margin: 0;
}


.cert-issuer {
  font-family: var(--mono);
  font-size: 0.69rem;
  color: var(--teal);
  letter-spacing: 0.04em;
}


.cert-btns {
  display: flex;
  gap: 6px;
  margin-top: auto;
}


/* ============================================================
   EDUCATION SECTION
   ============================================================ */
.education-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  max-width: 720px;
  margin: 0 auto;
}


.education-timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), var(--blue), transparent);
}


.edu-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 20px;
  padding-bottom: 26px;
  align-items: start;
}


.edu-item:last-child {
  padding-bottom: 0;
}


.edu-dot-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 12px;
}


.edu-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}


.edu-dot--alt  { background: var(--blue); }
.edu-dot--alt2 { background: var(--teal); }


.edu-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  box-shadow: var(--shadow);
  transition: border-color var(--transition);
}


.edu-card:hover {
  border-color: var(--border2);
}


.edu-date {
  font-family: var(--mono);
  font-size: 0.69rem;
  color: var(--accent);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 5px;
}


.edu-school {
  font-size: 0.93rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 4px;
}


.edu-degree {
  font-size: 0.81rem;
  color: var(--text2);
  margin-bottom: 8px;
}


.edu-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}


.edu-badge {
  font-family: var(--mono);
  font-size: 0.66rem;
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--teal-dim);
  border: 1px solid rgba(46, 181, 165, 0.2);
  color: var(--teal);
}


/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact-outer {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding-top: 20px;
}


.contact-panel {
  width: 100%;
  max-width: 560px;
}


.contact-intro {
  font-size: 0.84rem;
  color: var(--text2);
  line-height: 1.75;
  margin-bottom: 20px;
}


.contact-intro strong {
  color: var(--accent);
  font-weight: 600;
}


.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}


.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}


.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}


.form-label {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text2);
  letter-spacing: 0.03em;
}


.form-required {
  color: var(--red);
  margin-left: 2px;
}


.form-input,
.form-textarea {
  padding: 7px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface2);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.83rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: none;
  -webkit-appearance: none;
  appearance: none;
}


.form-input:focus,
.form-textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px rgba(74, 144, 217, 0.15);
}


.form-input.error,
.form-textarea.error {
  border-color: var(--red);
  box-shadow: 0 0 0 2px rgba(229, 83, 75, 0.12);
}


.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text3);
}


.form-textarea {
  min-height: 120px;
}


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


.char-count {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text3);
  margin-left: auto;
}


.char-count.over {
  color: var(--red);
}


.form-error {
  font-size: 0.7rem;
  color: var(--red);
  font-family: var(--mono);
  display: none;
}


.form-error.show {
  display: block;
}


.form-submit-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
}


.form-success {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: var(--teal-dim);
  border: 1px solid rgba(46, 181, 165, 0.25);
  color: var(--teal);
  font-size: 0.81rem;
  gap: 8px;
  align-items: center;
}


.form-success.show {
  display: flex;
}


/* ============================================================
   SYSTEM ARCHITECTURE SECTION
   ============================================================ */
.arch-wrap {
  max-width: 800px;
  margin: 0 auto;
}


.arch-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px;
}


.arch-date {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text3);
  display: flex;
  align-items: center;
  gap: 5px;
}


.arch-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--blue-dim);
  border: 1px solid rgba(74, 144, 217, 0.2);
  color: var(--blue);
}


.arch-content p {
  font-size: 0.86rem;
  color: var(--text2);
  line-height: 1.9;
  margin-bottom: 18px;
  text-align: justify;
}


.arch-content h3 {
  font-size: 0.97rem;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 10px;
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}


.arch-content h3::before {
  content: '//';
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
}


.arch-content code {
  font-family: var(--mono);
  font-size: 0.8em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 1px 5px;
  border-radius: 3px;
}


.arch-img-placeholder {
  width: 100%;
  aspect-ratio: 16 / 7;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--text3);
  font-size: 0.78rem;
  font-family: var(--mono);
  margin: 20px 0;
  position: relative;
  overflow: hidden;
}


.arch-img-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 24px 24px;
}


.arch-img-placeholder i {
  font-size: 1.6rem;
  position: relative;
  z-index: 1;
}


.arch-img-placeholder span {
  position: relative;
  z-index: 1;
}


/* ============================================================
   LIGHTBOX
   ============================================================ */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(8px);
  z-index: 9998;
  align-items: center;
  justify-content: center;
  padding: 40px;
}


#lightbox.open {
  display: flex;
}


#lightbox img {
  max-width: 88vw;
  max-height: 82vh;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  object-fit: contain;
}


#lightbox-close {
  position: absolute;
  top: 18px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border2);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition);
}


#lightbox-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}


/* ============================================================
   STATUS BAR (BOTTOM)
   ============================================================ */
#statusbar {
  position: fixed;
  bottom: 0;
  left: var(--nav-w);
  right: 0;
  height: 24px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 16px;
  z-index: 900;
  font-family: var(--mono);
  font-size: 0.67rem;
  color: var(--text3);
}


.status-item {
  display: flex;
  align-items: center;
  gap: 4px;
}


.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
}


.status-sep {
  opacity: 0.3;
}


/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}


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


/* Capped at 5 delays to prevent slow stacking on large lists */
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }


/* ============================================================
   RESPONSIVE — TABLET & MOBILE
   ============================================================ */
@media (max-width: 900px) {
  #sidebar       { display: none; }
  #mobile-topnav { display: block; }


  #main       { margin-left: 0; margin-top: calc(36px + var(--topnav-h)); }
  #statusbar  { left: 0; }


  .section      { min-height: calc(100vh - 36px - var(--topnav-h)); }
  .section-inner { padding: 20px 16px 40px; }
  .page-header  { padding: 12px 16px; }


  .about-grid   { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .certs-grid   { grid-template-columns: 1fr; }
  .form-row     { grid-template-columns: 1fr; }
  .interests-grid { grid-template-columns: repeat(3, 1fr); }
}


@media (max-width: 560px) {
  html { font-size: 13px; }
  .interests-grid  { grid-template-columns: 1fr 1fr; }
  .project-btns    { flex-direction: column; }
  .arch-wrap       { padding: 0; }
}

/* ============================================================
   RATE LIMIT / ERROR MESSAGE
   (Displayed when form submission is blocked or an error occurs)
   ============================================================ */

.rate-limit-msg {
  /* Hidden by default. JS adds the .show class to make it visible. */
  display: none;
  align-items: center;
  gap: 8px;

  padding: 10px 14px;
  border-radius: var(--radius);

  /* Orange-tinted background to signal a warning */
  background: var(--accent-dim);
  border: 1px solid rgba(232, 137, 26, 0.3);
  color: var(--accent);

  font-size: 0.79rem;
  line-height: 1.5;
}

/* When JS adds the .show class, the message becomes visible */
.rate-limit-msg.show {
  display: flex;
}

.rate-limit-msg i {
  flex-shrink: 0;
  font-size: 0.85rem;
}

/* Disabled button styling — shown during cooldown period */
#btn-send:disabled {
  opacity: 0.65;
  cursor: not-allowed;

  /* Remove the brightness hover effect on disabled state */
  filter: none;
}