/* Certificates / Documents
-----------------------------------------------------------------
   Mevcut temaya bağlı: --maincolor (#de6231), bg-light (#233d4d)
----------------------------------------------------------------- */

.certs {
  --cert-accent: var(--maincolor, #de6231);
  --cert-ink: #000;
  --cert-line: rgba(0, 0, 0, 0.12);
  --cert-card: #eaecf0;
  --cert-soft: rgba(0, 0, 0, 0.045);
  /* koyu (#233d4d) bolum uzerine oturan ogeler icin */
  --cert-on-dark: #ffffff;
  --cert-line-dark: rgba(255, 255, 255, 0.22);
  --cert-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New",
    monospace;
  position: relative;
}

/* ---------- Stats ---------- */
.certs-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--cert-line-dark);
  border: 1px solid var(--cert-line-dark);
  overflow: hidden;
  margin-bottom: 40px;
}

.certs-stat {
  background: var(--cert-card);
  color: var(--cert-ink);
  padding: 26px 20px;
  text-align: center;
}

.certs-stat b {
  display: block;
  font-size: 34px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.certs-stat span {
  display: block;
  margin-top: 8px;
  font-family: var(--cert-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.55;
}

/* ---------- Toolbar ---------- */
.certs-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 45px;
}

.certs-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.certs-chip {
  font-size: 12px;
  padding: 8px 18px;
  border: 1px solid var(--cert-line-dark);
  background: transparent;
  color: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.4s ease, color 0.4s ease, border-color 0.4s ease,
    transform 0.4s ease;
}

.certs-chip:hover {
  border-color: var(--cert-accent);
  transform: translateY(-2px);
}

.certs-chip.is-active {
  background: var(--cert-accent);
  border-color: var(--cert-accent);
  color: #fff;
}

.certs-search {
  position: relative;
  flex: 0 1 260px;
}

.certs-search input {
  width: 100%;
  font: inherit;
  font-size: 13px;
  padding: 11px 16px 11px 40px;
  border: 1px solid var(--cert-line);
  background: var(--cert-card);
  color: var(--cert-ink);
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.certs-search input::placeholder {
  opacity: 0.45;
}

.certs-search input:focus {
  border-color: var(--cert-accent);
  box-shadow: 0 0 0 4px rgba(222, 98, 49, 0.12);
}

.certs-search .ic {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  /* acik input zemini uzerinde: koyu bolumden gelen beyazi ez */
  color: var(--cert-ink);
  border: 1.5px solid currentColor;
  border-radius: 50%;
  opacity: 0.4;
  pointer-events: none;
}

.certs-search .ic:after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 7px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(45deg);
}

/* ---------- Timeline ---------- */
.tl {
  position: relative;
  padding-left: 34px;
}

.tl:before,
.tl-fill {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
}

.tl:before {
  background: repeating-linear-gradient(
    to bottom,
    var(--cert-line-dark) 0 6px,
    transparent 6px 12px
  );
}

.tl-fill {
  bottom: auto;
  height: 0;
  background: linear-gradient(
    to bottom,
    rgba(222, 98, 49, 0.15),
    var(--cert-accent)
  );
  transition: height 0.2s linear;
}

.tl-year {
  position: sticky;
  top: 12px;
  z-index: 4;
  margin: 0 0 26px;
  padding: 6px 0;
}

.tl-year span {
  display: inline-block;
  font-family: var(--cert-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  padding: 6px 14px;
  background: var(--cert-on-dark);
  color: #233d4d;
}

.tl-group + .tl-year {
  margin-top: 50px;
}

/* ---------- Card ---------- */
.cert {
  position: relative;
  margin-bottom: 22px;
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.8s cubic-bezier(0.2, 0.7, 0.2, 1),
    transform 0.8s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.cert.is-in {
  opacity: 1;
  transform: none;
}

.cert.is-out {
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
}

.cert-node {
  position: absolute;
  left: -34px;
  top: 34px;
  width: 16px;
  height: 16px;
  background: var(--cert-card);
  border: 2px solid var(--cert-line);
  transform: scale(0.4);
  transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1),
    border-color 0.5s ease;
  z-index: 3;
}

.cert.is-in .cert-node {
  transform: scale(1);
  border-color: var(--cert-accent);
}

.cert:hover .cert-node:after {
  content: "";
  position: absolute;
  inset: -6px;
  border: 1px solid var(--cert-accent);
  animation: certPulse 1.6s ease-out infinite;
}

@keyframes certPulse {
  0% {
    transform: scale(0.7);
    opacity: 0.7;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

.cert-card {
  position: relative;
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 0;
  background: var(--cert-card);
  color: var(--cert-ink);
  border: 1px solid var(--cert-line);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1),
    border-color 0.6s ease, box-shadow 0.6s ease;
}

.cert-card:hover {
  transform: translateY(-5px);
  border-color: var(--cert-accent);
  box-shadow: 0 18px 40px -22px rgba(0, 0, 0, 0.35);
}

/* sheen */
.cert-card:after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -60%;
  width: 45%;
  background: linear-gradient(
    100deg,
    transparent,
    rgba(255, 255, 255, 0.55),
    transparent
  );
  transform: skewX(-14deg);
  opacity: 0;
  pointer-events: none;
}

.cert-card:hover:after {
  animation: certSheen 0.9s ease-out;
}

@keyframes certSheen {
  0% {
    left: -60%;
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  100% {
    left: 120%;
    opacity: 0;
  }
}

.cert-thumb {
  position: relative;
  overflow: hidden;
  background: var(--cert-soft);
  min-height: 170px;
}

.cert-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 1s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.cert-card:hover .cert-thumb img {
  transform: scale(1.07);
}

.cert-ph {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px;
  font-family: var(--cert-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.42);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(0, 0, 0, 0.05) 0 6px,
    transparent 6px 12px
  );
}

.cert-body {
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cert-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.cert-date {
  font-family: var(--cert-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.55;
}

.cert-tag {
  font-size: 11px;
  padding: 5px 14px;
  border: 1px solid var(--cert-line);
  transition: background 0.5s ease, color 0.5s ease, border-color 0.5s ease;
}

.cert-card:hover .cert-tag {
  background: var(--cert-accent);
  border-color: var(--cert-accent);
  color: #fff;
}

.cert-title {
  font-size: 19px;
  font-weight: 500;
  line-height: 1.35;
  text-wrap: pretty;
}

.cert-issuer {
  font-size: 13px;
  opacity: 0.6;
}

.cert-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.cert-skills li {
  font-family: var(--cert-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  background: var(--cert-soft);
}

.cert-open {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cert-accent);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.cert-card:hover .cert-open {
  opacity: 1;
  transform: none;
}

.cert-open svg {
  width: 18px;
  stroke: var(--cert-accent);
  fill: var(--cert-accent);
  stroke-width: 2;
  transform: rotate(-45deg);
}

.certs-empty {
  padding: 60px 10px;
  text-align: center;
  font-family: var(--cert-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.45;
}

/* ---------- Modal ---------- */
.cert-modal {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.cert-modal.is-open {
  visibility: visible;
  opacity: 1;
}

.cert-modal-bg {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.cert-modal-panel {
  position: relative;
  color: var(--cert-ink);
  width: 100%;
  max-width: 900px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--cert-card, #eaecf0);
  transform: translateY(22px) scale(0.96);
  opacity: 0;
  transition: transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1), opacity 0.4s ease;
}

.cert-modal.is-open .cert-modal-panel {
  transform: none;
  opacity: 1;
}

.cert-modal-close {
  position: absolute;
  color: var(--cert-ink);
  top: 14px;
  right: 14px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  background: var(--cert-card);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  z-index: 2;
  transition: background 0.4s ease, color 0.4s ease, transform 0.4s ease;
}

.cert-modal-close:hover {
  background: var(--maincolor, #de6231);
  color: #fff;
  transform: rotate(90deg);
}

.cert-modal-hero {
  position: relative;
  height: 320px;
  background: rgba(0, 0, 0, 0.045);
  overflow: hidden;
}

.cert-modal-hero img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--cert-card);
}

.cert-modal-body {
  padding: 30px 34px 34px;
}

.cert-modal-body h3 {
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
  margin: 10px 0 6px;
  text-wrap: pretty;
}

.cert-modal-body .cert-issuer {
  font-size: 14px;
}

.cert-modal-desc {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
  opacity: 0.75;
  text-wrap: pretty;
}

.cert-modal-facts {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.cert-modal-facts div {
  background: var(--cert-card);
  padding: 16px 18px;
}

.cert-modal-facts dt {
  font-family: var(--cert-mono, monospace);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.5;
}

.cert-modal-facts dd {
  margin-top: 6px;
  font-size: 13px;
  word-break: break-word;
}

.cert-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.cert-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 13px 24px;
  border: 1px solid rgba(0, 0, 0, 0.15);
  text-decoration: none;
  color: inherit;
  transition: background 0.45s ease, color 0.45s ease, border-color 0.45s ease,
    transform 0.45s ease;
}

.cert-btn:hover {
  transform: translateY(-2px);
}

.cert-btn--solid {
  background: var(--maincolor, #de6231);
  border-color: var(--maincolor, #de6231);
  color: #fff;
}

.cert-btn--solid:hover {
  color: #fff;
  filter: brightness(1.06);
}

.cert-btn--ghost:hover {
  border-color: var(--maincolor, #de6231);
  color: var(--maincolor, #de6231);
}

.cert-btn[aria-disabled="true"] {
  opacity: 0.35;
  pointer-events: none;
}

body.cert-modal-open {
  overflow: hidden;
}

/* ---------- Responsive ---------- */
@media (max-width: 767px) {
  .certs-stats {
    grid-template-columns: 1fr;
  }

  .certs-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .certs-search {
    flex: 1 1 auto;
  }

  .cert-card {
    grid-template-columns: 1fr;
  }

  .cert-thumb {
    min-height: 190px;
    height: 190px;
  }

  .cert-body {
    padding: 22px;
  }

  .cert-modal-hero {
    height: 210px;
  }

  .cert-modal-body {
    padding: 24px 20px 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cert,
  .cert-node,
  .cert-card,
  .cert-modal-panel {
    transition-duration: 0.01ms !important;
  }

  .cert-card:hover:after,
  .cert:hover .cert-node:after {
    animation: none;
  }
}