/* --------------------------------------------------------------------------
   Studio Palette — core styles
   A polished portfolio aesthetic built for modern desktop + mobile
   -------------------------------------------------------------------------- */

/* ---- Base / Reset -------------------------------------------------------- */
:root {
  --bg: #ecf8ff;
  --bg-2: #f6fcff;
  --panel: rgba(255, 255, 255, 0.76);
  --panel-2: rgba(36, 84, 114, 0.08);
  --text: #133246;
  --muted: rgba(19, 50, 70, 0.68);
  --accent: #9edfff;
  --accent-2: #ccefff;
  --shadow: 0 18px 70px rgba(74, 126, 160, 0.22);
  --radius: 20px;
  --radius-sm: 14px;
  --border: 1px solid rgba(61, 121, 157, 0.16);
  --transition: 250ms ease;
  --font-body: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  --font-heading: ui-serif, Georgia, "Times New Roman", serif;
  --max-width: 1132px;
  --content-pad: clamp(1.8rem, 3vw, 3.4rem);
}

/* Theme variations */
body.theme-dark {
  --bg: #090a0f;
  --bg-2: #101216;
  --panel: rgba(20, 22, 32, 0.78);
  --panel-2: rgba(255, 255, 255, 0.05);
  --text: #f1f2f9;
  --muted: rgba(241, 242, 249, 0.68);
  --border: 1px solid rgba(255, 255, 255, 0.08);
  --accent: #b76dff;
  --accent-2: #26d6ff;
}

body.theme-light {
  --bg: #f9f9fc;
  --bg-2: #ffffff;
  --panel: rgba(255, 255, 255, 0.78);
  --panel-2: rgba(20, 22, 32, 0.05);
  --text: #11121a;
  --muted: rgba(17, 18, 26, 0.65);
  --border: 1px solid rgba(17, 18, 26, 0.09);
  --accent: #7f20ff;
  --accent-2: #009be0;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: radial-gradient(circle at 10% 12%, rgba(168, 224, 255, 0.55),
      transparent 46%),
    radial-gradient(circle at 92% 8%, rgba(196, 238, 255, 0.5), transparent 48%),
    radial-gradient(circle at 55% 72%, rgba(223, 245, 255, 0.72), transparent 64%),
    var(--bg);
  text-rendering: optimizeLegibility;
  font-family: var(--font-body);
  line-height: 1.55;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.45;
  background:
    linear-gradient(112deg,
      transparent 0%,
      rgba(255, 255, 255, 0.5) 12%,
      transparent 18%,
      rgba(170, 212, 234, 0.18) 28%,
      transparent 36%,
      rgba(255, 255, 255, 0.42) 46%,
      transparent 56%,
      rgba(148, 192, 216, 0.14) 66%,
      transparent 74%,
      rgba(255, 255, 255, 0.46) 84%,
      transparent 100%),
    linear-gradient(68deg,
      transparent 0%,
      rgba(255, 255, 255, 0.26) 16%,
      transparent 24%,
      rgba(176, 214, 235, 0.12) 38%,
      transparent 50%,
      rgba(255, 255, 255, 0.22) 64%,
      transparent 100%);
  mix-blend-mode: soft-light;
}

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

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

button,
input,
textarea,
select {
  font-family: inherit;
}

::selection {
  background: rgba(158, 223, 255, 0.45);
}

/* ---- Layout Helpers ------------------------------------------------------ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

.section {
  padding: clamp(6.2rem, 9vw, 12rem) 0 clamp(6.2rem, 9vw, 11.5rem);
}

.section--alt {
  background: linear-gradient(140deg, rgba(225, 244, 255, 0.86), rgba(242, 250, 255, 0.88));
}

.section__intro {
  max-width: 720px;
  margin: 0 auto 3.5rem;
  text-align: center;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(2.4rem, 4.2vw, 3.5rem);
  margin: 0 0 0.6rem;
  letter-spacing: -0.02em;
}

.section__lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ---- Top bar / navigation ---------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(236, 248, 255, 0.76);
  border-bottom: var(--border);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1.5rem, 2.5vw, 2.2rem);
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 1.2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
  position: relative;
}

.brand__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at 40% 30%, rgba(255, 255, 255, 0.32), transparent 55%);
  mix-blend-mode: screen;
}

.brand__text {
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand__dot {
  color: var(--accent);
}

.nav {
  flex: 1;
  margin-left: 2.1rem;
}

.nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: flex-end;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav__link {
  padding: 0.5rem 0.75rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform var(--transition), background var(--transition);
  background: rgba(19, 50, 70, 0.08);
  color: rgba(19, 50, 70, 0.9);
}

.nav__link:hover,
.nav__link:focus-visible {
  background: rgba(158, 223, 255, 0.45);
  transform: translateY(-1px);
}

.theme-toggle {
  border: none;
  background: rgba(19, 50, 70, 0.08);
  padding: 0.6rem;
  border-radius: 14px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--transition), transform var(--transition);
  color: var(--text);
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  transform: translateY(-1px);
  background: rgba(158, 223, 255, 0.45);
}

.theme-toggle__icon {
  font-size: 1.25rem;
  line-height: 1;
}

/* Mobile navigation toggle */
.nav-toggle {
  display: none;
  background: rgba(19, 50, 70, 0.08);
  border: none;
  padding: 0.55rem;
  border-radius: 16px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  display: grid;
  place-items: center;
  color: var(--text);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  background: rgba(158, 223, 255, 0.45);
  transform: translateY(-1px);
}

.nav-toggle__bar {
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: rgba(19, 50, 70, 0.88);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle__bar + .nav-toggle__bar {
  margin-top: 5px;
}

.nav-toggle.open .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---- Hero ---------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(8.5rem, 12vw, 14rem) 0 clamp(11rem, 14vw, 14.5rem);
}

.hero__content {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  z-index: 2;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.8rem, 5vw, 4.75rem);
  margin: 0;
  letter-spacing: -0.03em;
  line-height: 1.08;
  text-shadow: 0 20px 50px rgba(0, 0, 0, 0.38);
}

.hero__subtitle {
  font-size: 1.15rem;
  margin: 1.4rem auto 2.8rem;
  max-width: 620px;
  color: rgba(19, 50, 70, 0.8);
}

.hero__actions {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  mix-blend-mode: normal;
  pointer-events: none;
}

.hero__shape {
  position: absolute;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  filter: blur(30px);
  opacity: 0.8;
  animation: float 18s ease-in-out infinite;
}

.hero__shape--1 {
  width: 380px;
  height: 380px;
  top: 25%;
  left: 18%;
  background: radial-gradient(circle, rgba(143, 91, 255, 0.38), transparent 58%);
  animation-duration: 19s;
}

.hero__shape--2 {
  width: 520px;
  height: 520px;
  top: 40%;
  left: 70%;
  background: radial-gradient(circle, rgba(48, 211, 255, 0.32), transparent 58%);
  animation-duration: 21s;
}

.hero__shape--3 {
  width: 380px;
  height: 380px;
  top: 70%;
  left: 32%;
  background: radial-gradient(circle, rgba(255, 110, 170, 0.28), transparent 60%);
  animation-duration: 17s;
}

.hero__shape--4 {
  width: 260px;
  height: 260px;
  top: 75%;
  left: 75%;
  background: radial-gradient(circle, rgba(230, 230, 255, 0.22), transparent 55%);
  animation-duration: 23s;
}

@keyframes float {
  0% {
    transform: translate(-50%, -50%) translateY(0px) scale(1);
  }
  50% {
    transform: translate(-50%, -50%) translateY(-18px) scale(1.04);
  }
  100% {
    transform: translate(-50%, -50%) translateY(0px) scale(1);
  }
}

/* ---- Cards --------------------------------------------------------------- */
.grid {
  display: grid;
  gap: 1.6rem;
}

.grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid--compact {
  gap: 1.2rem;
}

@media (max-width: 1180px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .grid--3,
  .grid--2 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--panel);
  border: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 320px;
  position: relative;
  transform: translateY(0);
  transition: transform var(--transition), box-shadow var(--transition), border var(--transition);
}

.card:hover,
.card:focus-within {
  transform: translateY(-5px);
  box-shadow: 0 28px 76px rgba(0, 0, 0, 0.35);
  border-color: rgba(61, 121, 157, 0.24);
}

.card__image {
  position: relative;
  height: 180px;
  background: linear-gradient(135deg, rgba(143, 91, 255, 0.28), rgba(48, 211, 255, 0.18));
  display: grid;
  place-items: center;
  overflow: hidden;
}

.card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card__image video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  cursor: pointer;
}

.card__badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(20, 22, 32, 0.7);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
}

.card__body {
  padding: 1.6rem 1.6rem 1.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.card__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: -0.02em;
}

.card__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* 3D Graphic Art — ensure media is fully visible and not overlapped */
#graphic-3d-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}

#graphic-3d-grid .card {
  width: 100%;
  max-width: 920px;
  margin: 0 auto;
}

#graphic-3d-grid .card__image {
  height: auto;
  background: transparent;
}

#graphic-3d-grid .card__image img,
#graphic-3d-grid .card__image video {
  width: 100%;
  height: auto;
  max-height: 560px;
  object-fit: contain; /* show full frame */
  display: block;
  background: #000;
  cursor: pointer;
}

#graphic-3d-grid .card__body {
  margin-top: 0;
  padding: 0.8rem 1.2rem;
  position: relative;
  z-index: 1;
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.tag {
  display: inline-flex;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  font-weight: 600;
  background: rgba(19, 50, 70, 0.08);
  border: 1px solid rgba(61, 121, 157, 0.22);
  color: rgba(19, 50, 70, 0.9);
}

.placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  color: rgba(19, 50, 70, 0.88);
  text-align: center;
  padding: 1.6rem;
  background: radial-gradient(circle at 35% 35%, rgba(158, 223, 255, 0.2), transparent 58%),
    repeating-linear-gradient(
      135deg,
      rgba(61, 121, 157, 0.08),
      rgba(61, 121, 157, 0.08) 2px,
      transparent 2px,
      transparent 8px
    );
}

.placeholder__label {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  line-height: 1.3;
}

.placeholder--art {
  background: radial-gradient(circle at 20% 35%, rgba(143, 91, 255, 0.4), transparent 48%),
    radial-gradient(circle at 70% 20%, rgba(48, 211, 255, 0.3), transparent 45%),
    radial-gradient(circle at 55% 75%, rgba(247, 196, 255, 0.25), transparent 50%);
}

.placeholder--video {
  background: linear-gradient(150deg, rgba(48, 211, 255, 0.36), rgba(143, 91, 255, 0.22));
  position: relative;
}

.placeholder--video::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 25%, rgba(255, 255, 255, 0.12), transparent 55%);
}

.placeholder--video .placeholder__icon {
  font-size: 2.6rem;
  color: rgba(19, 50, 70, 0.85);
  text-shadow: 0 14px 26px rgba(0, 0, 0, 0.54);
}

.video-card {
  background: var(--panel);
  border: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-rows: 160px 1fr;
  transition: transform var(--transition), box-shadow var(--transition), grid-template-rows var(--transition);
}

.video-card:hover,
.video-card:focus-within {
  transform: translateY(-4px);
}

.video-card--expanded {
  grid-template-rows: 300px 1fr;
  transform: scale(1.03);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.video-card--expanded:hover,
.video-card--expanded:focus-within {
  transform: scale(1.03);
}

.video-card--expanded .video-card__thumb video {
  object-fit: contain;
  background: #000;
}

.video-card__thumb {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(48, 211, 255, 0.28), rgba(143, 91, 255, 0.3));
  display: grid;
  place-items: center;
}

.video-card__thumb video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  cursor: pointer;
}

.video-card__meta {
  position: absolute;
  bottom: 0.9rem;
  left: 0.9rem;
  display: flex;
  gap: 0.55rem;
  align-items: center;
  flex-wrap: wrap;
}

.video-card__duration {
  font-weight: 700;
  font-size: 0.9rem;
}

#youtube-videos-grid .video-card__meta .tag,
#youtube-videos-grid .video-card__meta .video-card__duration {
  color: #ffffff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

#youtube-videos-grid .video-card__meta .tag {
  background: rgba(10, 18, 28, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.video-card__body {
  padding: 1.35rem 1.35rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.video-card__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.video-card__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* 3D section cards reuse .card styling */

/* YouTube channel */
.channel-card {
  background: linear-gradient(160deg, rgba(143, 91, 255, 0.24), rgba(48, 211, 255, 0.18));
  border: var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.2rem;
  display: grid;
  gap: 1.8rem;
  min-height: 340px;
  position: relative;
}

.channel-card__header {
  display: flex;
  gap: 1.4rem;
  align-items: flex-start;
}

.channel-card__avatar {
  width: 86px;
  height: 86px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.placeholder--avatar {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: radial-gradient(circle at 45% 35%, rgba(143, 91, 255, 0.4), transparent 55%);
  box-shadow: inset 0 18px 28px rgba(0, 0, 0, 0.25);
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.95);
}

.placeholder--avatar .placeholder__icon {
  font-size: 1.55rem;
}

.channel-card__info {
  display: grid;
  gap: 0.55rem;
}

.channel-card__title {
  margin: 0;
  font-size: 1.65rem;
  letter-spacing: -0.02em;
}

.channel-card__subline {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.channel-card__stats {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  color: #ffffff;
  font-size: 0.92rem;
}

.channel-card__stats * {
  color: #ffffff;
}

.channel-card__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Newsletter cards */
.newsletter-card {
  background: var(--panel);
  border: var(--border);
  border-radius: var(--radius);
  padding: 1.8rem 1.7rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 1.1rem;
  min-height: 320px;
  transition: transform var(--transition);
}

.newsletter-card:hover,
.newsletter-card:focus-within {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.14);
}

.newsletter-card__header {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  align-items: baseline;
  color: rgba(242, 243, 249, 0.72);
  font-size: 0.9rem;
  font-weight: 600;
}

.newsletter-card__issue {
  letter-spacing: 0.06em;
}

.newsletter-card__title {
  margin: 0;
  font-size: 1.3rem;
  font-family: var(--font-heading);
}

.newsletter-card__text {
  margin: 0;
  color: var(--muted);
}

/* About section */
.about-grid {
  display: grid;
  gap: 1.6rem;
  grid-template-columns: repeat(3, 1fr);
}

.about-card {
  background: var(--panel);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  box-shadow: var(--shadow);
  min-height: 230px;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.about-card__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.4rem;
}

.about-card__text {
  margin: 0;
  color: var(--muted);
}

/* Contact section */
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 2.2rem;
}

.contact-info {
  background: var(--panel);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2.2rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
}

.contact-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.social-link {
  display: inline-flex;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.94rem;
  color: rgba(255, 255, 255, 0.88);
  transition: transform var(--transition), background var(--transition);
}

.social-link:hover,
.social-link:focus-visible {
  transform: translateY(-2px);
  background: rgba(143, 91, 255, 0.18);
}

.contact-form {
  background: var(--panel);
  border: var(--border);
  border-radius: var(--radius);
  padding: 2.2rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 1.3rem;
}

.form-row {
  display: grid;
  gap: 0.6rem;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: rgba(242, 243, 249, 0.78);
}

.form-input {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  padding: 0.9rem 1.05rem;
  font-size: 0.95rem;
  transition: border var(--transition), box-shadow var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: rgba(143, 91, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(143, 91, 255, 0.18);
}

.form-input--textarea {
  resize: vertical;
  min-height: 160px;
}

.form-row--actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.form-status {
  font-size: 0.95rem;
  color: rgba(242, 243, 249, 0.78);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border-radius: 999px;
  padding: 0.75rem 1.3rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: transform var(--transition), background var(--transition),
    border var(--transition);
  cursor: pointer;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.9);
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
  background: rgba(143, 91, 255, 0.18);
}

.btn--primary {
  background: linear-gradient(125deg, var(--accent), var(--accent-2));
  border-color: rgba(255, 255, 255, 0.18);
  color: #0b0b10;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.35);
  transform: translateY(-2px);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.9);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(255, 255, 255, 0.12);
}

.btn--small {
  padding: 0.6rem 1rem;
  font-size: 0.82rem;
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 1.35rem;
  bottom: 1.35rem;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: none;
  background: rgba(20, 22, 32, 0.78);
  color: rgba(255, 255, 255, 0.86);
  display: grid;
  place-items: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition);
  z-index: 60;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.28);
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  transform: translateY(-2px);
  background: rgba(143, 91, 255, 0.22);
}

.back-to-top .icon {
  font-weight: 800;
  font-size: 1.55rem;
  line-height: 1;
}

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 60;
  border-radius: 0 0 100px 100px;
  pointer-events: none;
  transition: width 0.15s ease-out;
}

/* Reveal animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.footer {
  padding: 3.5rem 0 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(18, 19, 26, 0.94), rgba(20, 22, 32, 0.95));
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-pad);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.25rem;
  align-items: baseline;
  color: rgba(242, 243, 249, 0.65);
  font-size: 0.91rem;
}

.footer__note {
  margin: 0;
}

.footer__links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.footer__links a {
  color: rgba(242, 243, 249, 0.65);
  transition: color var(--transition);
}

.footer__links a:hover,
.footer__links a:focus-visible {
  color: rgba(242, 243, 249, 0.95);
}

/* Image lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.lightbox.show {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
}

.lightbox__content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox__close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background var(--transition);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox__image {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lightbox__title {
  margin: 1rem 0 0;
  text-align: center;
  color: var(--text);
  font-size: 1.1rem;
}

/* ---- Placeholder message ------------------------------------------------- */
.placeholder-message {
  grid-column: 1 / -1;
  color: rgba(242, 243, 249, 0.7);
  font-size: 1rem;
  text-align: center;
  padding: 2rem 1rem;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
}

/* ---- Responsive tweaks -------------------------------------------------- */
@media (max-width: 890px) {  nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    background: var(--panel);
    z-index: 998;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0;
  }

  nav a {
    padding: 1rem;
    font-size: 0.95rem;
  }

  .nav-toggle {
    display: flex;
  }

  main {
    padding-top: 80px;
  }

  .hero {
    padding: 3rem 1.5rem 2rem;
  }

  .hero__title {
    font-size: 2.2rem;
  }

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

  .grid--2 {
    grid-template-columns: 1fr;
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .section {
    padding: 2rem 1.5rem;
  }

  .section__title {
    font-size: 1.8rem;
  }
}

@media (max-width: 640px) {
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .hero__title {
    font-size: 1.8rem;
  }

  .section__title {
    font-size: 1.4rem;
  }

  .card__body {
    padding: 1rem 1rem 1.2rem;
  }

  .card__title {
    font-size: 1.2rem;
  }
}