/* ============================================
   Riya Yallabandi - Portfolio Design System
   Minimal & Elegant / Product Design Focus
   ============================================ */

/* --- Type Scale (Fluid) --- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.8125rem, 0.76rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.0625rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.5vw,  1.375rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.25rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    4.5rem);

  /* --- Spacing (4px grid) --- */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* --- Typography --- */
  --font-display: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  /* --- Radius --- */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* --- Content widths --- */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* --- Transitions --- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Light Mode (Default) --- */
:root, [data-theme="light"] {
  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5F5F0;
  --color-surface-offset: #EEEDE8;
  --color-divider: #E0DED8;
  --color-border: #D4D2CB;
  --color-text: #1A1A18;
  --color-text-secondary: #5A5A54;
  --color-text-muted: #8A8A82;
  --color-text-faint: #B5B5AE;
  --color-accent: #D4654A;
  --color-accent-hover: #BF5239;
  --color-accent-subtle: #FDF0ED;
  --color-tag-bg: #F0EFEB;
  --color-tag-text: #5A5A54;
  --shadow-sm: 0 1px 3px rgba(26, 26, 24, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 26, 24, 0.06);
  --shadow-lg: 0 12px 40px rgba(26, 26, 24, 0.08);
}

/* --- Dark Mode --- */
[data-theme="dark"] {
  --color-bg: #141413;
  --color-surface: #1C1C1A;
  --color-surface-2: #232320;
  --color-surface-offset: #1E1E1C;
  --color-divider: #2E2E2B;
  --color-border: #3A3A36;
  --color-text: #E8E8E4;
  --color-text-secondary: #A8A8A2;
  --color-text-muted: #787872;
  --color-text-faint: #4A4A46;
  --color-accent: #E8825E;
  --color-accent-hover: #F09570;
  --color-accent-subtle: #2A2018;
  --color-tag-bg: #2A2A27;
  --color-tag-text: #A8A8A2;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #141413;
    --color-surface: #1C1C1A;
    --color-surface-2: #232320;
    --color-surface-offset: #1E1E1C;
    --color-divider: #2E2E2B;
    --color-border: #3A3A36;
    --color-text: #E8E8E4;
    --color-text-secondary: #A8A8A2;
    --color-text-muted: #787872;
    --color-text-faint: #4A4A46;
    --color-accent: #E8825E;
    --color-accent-hover: #F09570;
    --color-accent-subtle: #2A2018;
    --color-tag-bg: #2A2A27;
    --color-tag-text: #A8A8A2;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
  }
}

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 767px) {
  .container { padding-inline: 20px; }
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

.container--narrow {
  max-width: var(--content-default);
}

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-5) 0;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: padding 300ms var(--ease-out), box-shadow 300ms var(--ease-out);
}

.nav--scrolled {
  padding: var(--space-3) 0;
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 767px) {
  .nav__inner { padding-inline: 20px; }
}

@media (min-width: 768px) {
  .nav__inner { padding-inline: var(--space-8); }
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.logo-dot {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 300ms var(--ease-out);
}

.nav__link:hover { color: var(--color-text); }
.nav__link:hover::after { width: 100%; }

.nav__theme-toggle {
  color: var(--color-text-secondary);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav__theme-toggle:hover { color: var(--color-text); background: var(--color-accent-subtle); }

/* Mobile nav */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: 101;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform 300ms var(--ease-out), opacity 200ms;
}
.nav__hamburger.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__hamburger.active span:nth-child(2) { opacity: 0; }
.nav__hamburger.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav__mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
}

.nav__mobile-menu.open {
  display: flex;
  opacity: 1;
}

.nav__mobile-menu a {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

@media (max-width: 767px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: var(--space-24);
  padding-bottom: var(--space-16);
}

@media (max-width: 767px) {
  .hero {
    padding-top: var(--space-20);
    min-height: auto;
    padding-bottom: var(--space-12);
  }
}

/* Hero two-column layout */
.hero__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
  width: 100%;
}

@media (min-width: 768px) {
  .hero__layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-16);
  }
}

.hero__content {
  max-width: 820px;
}

.hero__photo-wrapper {
  display: flex;
  justify-content: center;
}

.hero__photo {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-2xl);
  box-shadow: 0 16px 48px rgba(0,0,0,0.08);
}

@media (max-width: 767px) {
  .hero__photo-wrapper {
    order: 1;
  }
  .hero__photo {
    max-width: 260px;
  }
}

.hero__greeting {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero__name {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  font-weight: 400;
  line-height: 1.6;
  max-width: 580px;
  margin-bottom: var(--space-10);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  text-decoration: none;
  padding-bottom: var(--space-1);
  border-bottom: 2px solid var(--color-accent);
}

.hero__cta:hover {
  gap: var(--space-5);
  color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.hero__cta svg {
  width: 16px;
  height: 16px;
  transition: transform 300ms var(--ease-out);
}

.hero__cta:hover svg {
  transform: translateX(4px);
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-text-faint), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================
   Section Shared
   ============================================ */

.section {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

.section__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-8);
}

.section__divider {
  width: 100%;
  height: 1px;
  background: var(--color-divider);
  border: none;
}

/* ============================================
   Project Cards (Work Section)
   ============================================ */

.work-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .work-grid { gap: var(--space-10); }
}

.project-card {
  display: block;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--color-surface-2);
  transition: transform 400ms var(--ease-out), box-shadow 400ms var(--ease-out);
}

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

.project-card__image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--color-surface-offset);
}

.project-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease-out);
}

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

.project-card__content {
  padding: var(--space-6) var(--space-8) var(--space-8);
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: var(--space-1) var(--space-3);
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: var(--radius-md);
  transition: background 200ms var(--ease-out), color 200ms var(--ease-out);
}

.project-card:hover .tag {
  background: var(--color-accent-subtle);
  color: var(--color-accent);
}

.project-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}

.project-card__desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.project-card__arrow {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 40px;
  height: 40px;
  background: var(--color-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translate(-8px, 8px);
  transition: opacity 300ms var(--ease-out), transform 300ms var(--ease-out);
}

.project-card:hover .project-card__arrow {
  opacity: 1;
  transform: translate(0, 0);
}

.project-card__arrow svg {
  width: 18px;
  height: 18px;
  color: var(--color-text);
}

/* Featured project (larger) */
.project-card--featured .project-card__image-wrap {
  aspect-ratio: 16 / 9;
}

/* Two-column sub-grid for smaller project cards */
.work-grid--two-col {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .work-grid--two-col {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }
}

/* ============================================
   About Preview
   ============================================ */

.about-preview {
  display: grid;
  gap: var(--space-10);
  align-items: center;
}

@media (min-width: 768px) {
  .about-preview {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-16);
  }
}

.about-preview__image {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--color-surface-2);
}

.about-preview__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 65%;
}

.about-preview__text h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.about-preview__text p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.about-preview__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  margin-top: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.about-preview__link:hover {
  gap: var(--space-3);
  color: var(--color-accent-hover);
}

/* ============================================
   Skills / Experience Bar
   ============================================ */

.skills-section {
  background: var(--color-surface-2);
  padding-block: clamp(var(--space-12), 6vw, var(--space-24));
}

.skills-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-10);
  }
}

.skill-group__title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

.skill-group__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.skill-group__list li {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

/* ============================================
   Experience Timeline
   ============================================ */

.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.timeline__item {
  display: grid;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .timeline__item {
    grid-template-columns: 200px 1fr;
    gap: var(--space-8);
  }
}

.timeline__date {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.timeline__role {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.timeline__company {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.timeline__desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ============================================
   Contact / Footer
   ============================================ */

.contact {
  text-align: center;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

.contact .section__label {
  text-align: center;
  display: block;
  width: 100%;
  margin-inline: auto;
}

.contact__heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.contact__sub {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 480px;
  margin-inline: auto;
}

.contact__email {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  padding-bottom: var(--space-1);
  border-bottom: 2px solid var(--color-accent);
  transition: border-color 300ms var(--ease-out), color 300ms var(--ease-out);
}

.contact__email:hover {
  color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.contact__socials {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.contact__social-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.contact__social-link:hover {
  color: var(--color-accent);
}

.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.footer__back-to-top {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer__back-to-top:hover {
  color: var(--color-accent);
}

/* ============================================
   Case Study Page
   ============================================ */

.case-hero {
  padding-top: calc(var(--space-24) + var(--space-4));
  padding-bottom: var(--space-10);
}

@media (max-width: 767px) {
  .case-hero {
    padding-top: calc(var(--space-20) + var(--space-8));
    padding-bottom: var(--space-10);
  }
}

.case-hero__back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  margin-bottom: var(--space-8);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.case-hero__back:hover { color: var(--color-accent); }

.case-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.case-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: var(--space-8);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.case-meta__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.case-meta__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

.case-meta__value {
  font-size: var(--text-base);
  color: var(--color-text);
}

/* Case study content */
.case-content {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 767px) {
  .case-content { padding-inline: 20px; }
}

@media (min-width: 768px) {
  .case-content { padding-inline: var(--space-8); }
}

.case-section {
  padding-block: var(--space-12);
}

.case-section + .case-section {
  border-top: 1px solid var(--color-divider);
}

.case-section__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.case-section h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

.case-section p {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.case-section ul {
  list-style: none;
  margin-bottom: var(--space-6);
}

.case-section ul li {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: var(--space-6);
  position: relative;
  margin-bottom: var(--space-2);
}

.case-section ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.5;
}

.case-image {
  margin-block: var(--space-8);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-2);
  cursor: pointer;
}

.case-image img {
  width: 100%;
  display: block;
}

.case-image--full {
  margin-inline: calc(var(--space-8) * -1);
  border-radius: 0;
}

@media (min-width: 768px) {
  .case-image--full {
    margin-inline: calc(var(--space-16) * -1);
    border-radius: var(--radius-lg);
  }
}

/* Mobile screenshot — phone mockup treatment */
.case-image--mobile {
  display: flex;
  justify-content: center;
  background: transparent;
  overflow: visible;
  margin-block: var(--space-10);
}

.case-image--mobile img {
  max-width: 390px;
  width: 100%;
  border-radius: 32px;
  box-shadow:
    0 8px 40px rgba(0,0,0,0.06),
    0 0 0 1px rgba(0,0,0,0.04),
    0 2px 8px rgba(0,0,0,0.04);
}

[data-theme="dark"] .case-image--mobile img {
  box-shadow:
    0 8px 40px rgba(0,0,0,0.25),
    0 0 0 1px rgba(255,255,255,0.06),
    0 2px 8px rgba(0,0,0,0.15);
}

/* Two-column case layout */
.case-two-col {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .case-two-col {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

/* Highlight box */
.case-highlight {
  background: var(--color-surface-2);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-block: var(--space-6);
}

.case-highlight h4 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

/* ============================================
   About Page
   ============================================ */

.about-hero {
  padding-top: calc(var(--space-32) + var(--space-8));
  padding-bottom: var(--space-16);
}

@media (max-width: 767px) {
  .about-hero {
    padding-top: calc(var(--space-20) + var(--space-8));
    padding-bottom: var(--space-10);
  }
}

.about-hero__layout {
  display: grid;
  gap: var(--space-10);
  align-items: start;
}

@media (min-width: 768px) {
  .about-hero__layout {
    grid-template-columns: 1.3fr 1fr;
    gap: var(--space-16);
  }
}

.about-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.about-hero__bio {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}

.about-hero__photo {
  border-radius: var(--radius-2xl);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--color-surface-2);
}

.about-hero__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* About page photo */
.about-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-2xl);
}

/* Education */
.education-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .education-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

.education-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.education-card__degree {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.education-card__school {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ============================================
   Graphic Design Page
   ============================================ */

.gallery-grid {
  columns: 2 280px;
  column-gap: var(--space-4);
}

@media (min-width: 768px) {
  .gallery-grid {
    columns: 3 300px;
    column-gap: var(--space-6);
  }
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-2);
  position: relative;
  cursor: pointer;
}

@media (min-width: 768px) {
  .gallery-item {
    margin-bottom: var(--space-6);
  }
}

.gallery-item img {
  width: 100%;
  display: block;
  transition: transform 500ms var(--ease-out);
}

.gallery-item:hover img {
  transform: scale(1.03);
}

.gallery-item__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4) var(--space-5);
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 100%);
  color: #fff;
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
}

.gallery-item:hover .gallery-item__overlay {
  opacity: 1;
}

.gallery-item__overlay-title {
  font-size: var(--text-sm);
  font-weight: 600;
}

.gallery-item__overlay-cat {
  font-size: var(--text-xs);
  opacity: 0.8;
}

/* ============================================
   Lightbox
   ============================================ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms var(--ease-out);
  cursor: zoom-out;
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  cursor: default;
}

.lightbox__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  cursor: pointer;
  transition: background 200ms;
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ============================================
   Scroll Animations (CSS-only, progressive enhancement)
   ============================================ */

.fade-in { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: revealFade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes revealFade {
  to { opacity: 1; }
}

.reveal-up { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .reveal-up {
    clip-path: inset(100% 0 0 0);
    animation: revealClip linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}

@keyframes revealClip {
  to { clip-path: inset(0 0 0 0); }
}

/* Stagger children */
.stagger > * { opacity: 1; }

@supports (animation-timeline: scroll()) {
  .stagger > * {
    opacity: 0;
    animation: revealFade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
  .stagger > *:nth-child(2) { animation-delay: 60ms; }
  .stagger > *:nth-child(3) { animation-delay: 120ms; }
  .stagger > *:nth-child(4) { animation-delay: 180ms; }
  .stagger > *:nth-child(5) { animation-delay: 240ms; }
  .stagger > *:nth-child(6) { animation-delay: 300ms; }
}

/* ============================================
   Page Transition overlay
   ============================================ */

.page-transition {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 250ms var(--ease-in);
}

.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* ============================================
   Responsive Utilities
   ============================================ */

@media (max-width: 767px) {
  .hide-mobile { display: none !important; }
  .hero__content { padding-right: 0; }
  .case-meta { gap: var(--space-6); }
  .project-card__content { padding: var(--space-5) var(--space-6) var(--space-6); }
}

@media (min-width: 768px) {
  .hide-desktop { display: none !important; }
}