/* ═══════════════════════════════════════════
   COMPONENTS — glass, buttons, flip cards, tags, modal
   ═══════════════════════════════════════════ */

/* ── Glass base ── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.85);
  transition: transform 0.4s var(--ease-out), border-color 0.4s, box-shadow 0.4s;
}
.glass:hover { border-color: var(--glass-border-hover); }

.glass-chip {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border-hover);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 12px; font-weight: 600;
  letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--accent);
}

/* ── Section headers ── */
.sec-head { position: relative; margin-bottom: 70px; }
.sec-num {
  position: absolute; top: -58px; left: -14px;
  font-family: var(--font-display);
  font-size: clamp(110px, 14vw, 180px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(14, 27, 58, 0.13);
  pointer-events: none; user-select: none;
}
.sec-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 600;
  letter-spacing: 4px; text-transform: uppercase;
  color: var(--accent);
}
.sec-label::before { content: ''; width: 34px; height: 1.5px; background: var(--grad); }
.sec-title {
  font-family: var(--font-display);
  font-size: clamp(52px, 7vw, 96px);
  font-weight: 400;
  letter-spacing: 2px;
  line-height: 1;
  margin-top: 12px;
}
.sec-sub { color: var(--text-sub); font-size: 14.5px; margin-top: 14px; max-width: 520px; }

/* ── Buttons ── */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  padding: 16px 36px;
  font-size: 14px; font-weight: 700;
  letter-spacing: 0.3px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
  will-change: transform;
}
.btn span { position: relative; z-index: 1; }
.btn-primary {
  color: #fff;
  background: var(--grad);
  box-shadow: 0 8px 30px rgba(8, 145, 178, 0.28);
}
.btn-primary::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.45) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.7s var(--ease-out);
}
.btn-primary:hover { box-shadow: 0 14px 44px rgba(8, 145, 178, 0.45); }
.btn-primary:hover::before { transform: translateX(100%); }
.btn-ghost {
  color: var(--text);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover { border-color: var(--glass-border-hover); box-shadow: var(--glow-accent); }

/* ── Flip cards (skills & certificates) ── */
.flip-card { height: 230px; perspective: 1200px; cursor: pointer; }
.flip-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.8s var(--ease-spring);
}
.flip-card:hover .flip-inner,
.flip-card:focus-visible .flip-inner,
.flip-card.flipped .flip-inner { transform: rotateY(180deg); }

.flip-front, .flip-back {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 22px;
  border-radius: var(--radius);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.flip-front {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: border-color 0.3s;
}
.flip-card:hover .flip-front { border-color: var(--glass-border-hover); }
.flip-back {
  transform: rotateY(180deg);
  background: linear-gradient(150deg, #0891B2, #2563EB);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 20px 60px rgba(29, 78, 216, 0.3);
}

.logo-chip {
  width: 84px; height: 84px;
  display: grid; place-items: center;
  margin-bottom: 16px;
  background: rgba(8, 145, 178, 0.06);
  border: 1px solid rgba(8, 145, 178, 0.2);
  border-radius: 20px;
  transition: transform 0.35s var(--ease-spring), background 0.3s;
}
/* brand logos tinted to the site theme (detail preserved) */
.logo-chip img {
  width: 54px; height: 54px;
  object-fit: contain;
  filter: grayscale(1) sepia(1) hue-rotate(150deg) saturate(4.2) brightness(0.92);
}
/* local SVGs are already in theme colour */
.logo-chip img.local { filter: none; }
.flip-card:hover .logo-chip { background: rgba(8, 145, 178, 0.12); }
.flip-card:hover .logo-chip { transform: scale(1.08) translateY(-4px); }

.skill-name { font-size: 15px; font-weight: 700; text-align: center; }
.skill-cat {
  margin-top: 5px;
  font-size: 10.5px; font-weight: 600;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--text-sub);
}

.b-pct { font-family: var(--font-display); font-size: 54px; line-height: 1; color: #fff; }
.b-bar {
  width: 72%; height: 5px;
  margin: 16px 0 12px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
  overflow: hidden;
}
.b-fill {
  height: 100%; width: 0;
  background: var(--grad);
  border-radius: 3px;
  box-shadow: 0 0 12px rgba(8, 145, 178, 0.7);
  transition: width 1.1s var(--ease-out) 0.25s;
}
.flip-card:hover .b-fill, .flip-card.flipped .b-fill { width: var(--pct); }
.b-label {
  font-size: 11px; font-weight: 700;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
}

/* cert variant */
.cert-flip { height: 260px; }
.cert-year-big { font-family: var(--font-display); font-size: 48px; line-height: 1; color: #fff; }
.cert-btn {
  margin-top: 18px;
  padding: 12px 26px;
  font-size: 13px; font-weight: 700;
  color: #fff;
  background: var(--grad);
  border: none; border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(8, 145, 178, 0.3);
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s;
}
.cert-btn:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(8, 145, 178, 0.5); }

/* ── Tags ── */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  padding: 9px 18px;
  font-size: 13px; font-weight: 600;
  color: var(--accent);
  background: rgba(8, 145, 178, 0.06);
  border: 1px solid rgba(8, 145, 178, 0.22);
  border-radius: 999px;
  transition: transform 0.25s var(--ease-out), background 0.25s, color 0.25s, box-shadow 0.25s;
}
.tag:hover {
  transform: translateY(-3px) scale(1.04);
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 22px rgba(8, 145, 178, 0.35);
}

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  display: flex; align-items: center; justify-content: center;
  background: rgba(14, 27, 58, 0.45);
  backdrop-filter: blur(14px);
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
  width: 92%; max-width: 900px; height: 85vh;
  display: flex; flex-direction: column;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.97);
  transform: perspective(1200px) rotateX(8deg) scale(0.92);
  opacity: 0;
  transition: transform 0.5s var(--ease-spring), opacity 0.4s;
}
.modal-overlay.active .modal { transform: perspective(1200px) rotateX(0) scale(1); opacity: 1; }
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid rgba(14, 27, 58, 0.1);
  flex-shrink: 0;
}
.modal-title { font-size: 14px; font-weight: 700; color: var(--accent); letter-spacing: 0.5px; }
.modal-close {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  font-size: 15px;
  color: var(--text);
  background: rgba(8, 145, 178, 0.08);
  border: 1px solid rgba(8, 145, 178, 0.25);
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.3s var(--ease-out), background 0.3s, color 0.3s;
}
.modal-close:hover { background: var(--accent); color: #fff; transform: rotate(90deg); }
.modal-body { flex: 1; }
.modal-body iframe { width: 100%; height: 100%; border: none; }