/* ============================================
   UDAY KOTAK JR. – DESIGN SYSTEM
   Minimal Signal + Identity Blocks
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-white: #FFFFFF;
  --color-offwhite: #F7F7F5;
  --color-soft-grey: #E8E8E4;
  --color-mid-grey: #B0B0A8;
  --color-dark-grey: #6B6B63;
  --color-navy: #1A2744;
  --color-navy-light: #2A3A5C;
  --color-navy-dark: #0F1A2E;
  --color-black: #111111;
  --color-accent: #3A5A8C;
  --color-border: rgba(26, 39, 68, 0.08);
  --color-border-hover: rgba(26, 39, 68, 0.16);

  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --space-xs: clamp(0.25rem, 0.5vw, 0.5rem);
  --space-sm: clamp(0.5rem, 1vw, 1rem);
  --space-md: clamp(1rem, 2vw, 1.5rem);
  --space-lg: clamp(1.5rem, 3vw, 2.5rem);
  --space-xl: clamp(2.5rem, 5vw, 4rem);
  --space-2xl: clamp(4rem, 8vw, 7rem);
  --space-3xl: clamp(6rem, 10vw, 10rem);

  --container-max: 1200px;
  --container-narrow: 800px;
  --border-radius: 6px;
  --border-radius-lg: 12px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-light);
  color: var(--color-black);
  background-color: var(--color-offwhite);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

a:hover {
  color: var(--color-accent);
}

ul, ol {
  list-style: none;
}

/* --- Typography --- */
h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: var(--font-weight-semibold);
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-navy);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

h3 {
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  font-weight: var(--font-weight-medium);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-navy-dark);
}

h4 {
  font-size: clamp(0.95rem, 1.2vw, 1.1rem);
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  color: var(--color-dark-grey);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

p {
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  color: var(--color-dark-grey);
  max-width: 65ch;
}

.text-large {
  font-size: clamp(1.1rem, 1.5vw, 1.25rem);
  line-height: 1.8;
}

.text-small {
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.text-label {
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-mid-grey);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section {
  padding: var(--space-2xl) 0;
}

.section--flush {
  padding: 0;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(247, 247, 245, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-base);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav__brand {
  font-size: 1.05rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav__link {
  font-size: 0.82rem;
  font-weight: var(--font-weight-regular);
  color: var(--color-dark-grey);
  letter-spacing: 0.01em;
  padding: 0.4rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-navy);
  transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-navy);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Mobile Nav Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--color-navy);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  position: relative;
}

.hero__content {
  max-width: 700px;
}

.hero__label {
  display: inline-block;
  margin-bottom: var(--space-md);
}

.hero__title {
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
  color: var(--color-dark-grey);
  line-height: 1.8;
  max-width: 540px;
}

.hero__line {
  width: 48px;
  height: 2px;
  background: var(--color-navy);
  margin-top: var(--space-lg);
}

/* --- Identity Blocks --- */
.identity-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.identity-block {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.identity-block:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26, 39, 68, 0.06);
}

.identity-block__number {
  font-size: 0.7rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-mid-grey);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}

.identity-block__title {
  margin-bottom: var(--space-sm);
}

.identity-block__text {
  line-height: 1.75;
}

/* --- Content Grid --- */
.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.content-grid--reverse {
  direction: rtl;
}

.content-grid--reverse > * {
  direction: ltr;
}

.content-grid__image {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.content-grid__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  transition: transform var(--transition-slow);
}

.content-grid__image:hover img {
  transform: scale(1.03);
}

.content-grid__body h2 {
  margin-bottom: var(--space-md);
}

.content-grid__body p {
  margin-bottom: var(--space-sm);
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(26, 39, 68, 0.05);
}

.card__image {
  overflow: hidden;
}

.card__image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card__image img {
  transform: scale(1.04);
}

.card__body {
  padding: var(--space-lg);
}

.card__body h3 {
  margin-bottom: var(--space-xs);
}

.card__body p {
  font-size: 0.9rem;
}

/* --- Gallery Grid --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.gallery-item {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26, 39, 68, 0.5), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-md);
}

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

.gallery-item__overlay span {
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: var(--font-weight-medium);
}

/* --- Section Header --- */
.section-header {
  margin-bottom: var(--space-xl);
}

.section-header h4 {
  margin-bottom: var(--space-sm);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

.section-header p {
  max-width: 55ch;
}

.section-header--center {
  text-align: center;
}

.section-header--center p {
  margin: 0 auto;
}

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

/* --- Timeline --- */
.timeline {
  position: relative;
  padding-left: var(--space-xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--color-soft-grey);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-xl);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-xl) - 3px);
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-navy);
}

.timeline__item h3 {
  margin-bottom: var(--space-xs);
}

.timeline__item .text-label {
  margin-bottom: var(--space-xs);
  display: block;
}

/* --- Contact Form --- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: 0.8rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-dark-grey);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-primary);
  font-size: 0.95rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-soft-grey);
  border-radius: var(--border-radius);
  background: var(--color-white);
  color: var(--color-black);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px rgba(26, 39, 68, 0.08);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

/* --- Button --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2.2rem;
  font-family: var(--font-primary);
  font-size: 0.85rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.04em;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn--primary {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-navy-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(26, 39, 68, 0.2);
}

.btn--outline {
  background: transparent;
  color: var(--color-navy);
  border: 1.5px solid var(--color-navy);
}

.btn--outline:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

/* --- Contact Info Block --- */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-info__item h3 {
  margin-bottom: var(--space-xs);
}

.contact-info__item p {
  font-size: 0.95rem;
}

.contact-info__item a {
  color: var(--color-dark-grey);
  transition: color var(--transition-fast);
}

.contact-info__item a:hover {
  color: var(--color-navy);
}

/* --- Social Links --- */
.social-links {
  display: flex;
  gap: var(--space-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-dark-grey);
  font-size: 0.85rem;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

.social-link svg {
  width: 16px;
  height: 16px;
  display: block;
}

.social-link:hover {
  border-color: var(--color-navy);
  color: var(--color-white);
  background: var(--color-navy);
}

/* --- Footer --- */
.footer {
  background: var(--color-navy-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-xl) 0;
  margin-top: var(--space-2xl);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.footer__brand {
  color: var(--color-white);
  font-weight: var(--font-weight-medium);
  font-size: 0.95rem;
}

.footer__credit {
  text-align: center;
  font-size: 0.8rem;
}

.footer__credit a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

.footer__credit a:hover {
  color: var(--color-white);
}

.footer__contact {
  text-align: right;
  font-size: 0.8rem;
}

.footer__contact a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer__contact a:hover {
  color: var(--color-white);
}

.footer__contact p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
}

.footer__social {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  justify-content: flex-end;
}

.footer__social .social-link {
  width: 34px;
  height: 34px;
  border-color: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.75rem;
}

.footer__social .social-link svg {
  width: 14px;
  height: 14px;
}

.footer__social .social-link:hover {
  border-color: var(--color-white);
  color: var(--color-navy-dark);
  background: var(--color-white);
}

/* --- Password Page --- */
.password-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-offwhite);
  position: relative;
}

.password-box {
  text-align: center;
  max-width: 380px;
  width: 100%;
  padding: 0 var(--space-lg);
}

.password-box__brand {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-navy);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xl);
}

.password-box__label {
  margin-bottom: var(--space-md);
}

.password-box input {
  width: 100%;
  font-family: var(--font-primary);
  font-size: 0.95rem;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--color-soft-grey);
  border-radius: var(--border-radius);
  background: var(--color-white);
  color: var(--color-black);
  text-align: center;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  letter-spacing: 0.15em;
}

.password-box input:focus {
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px rgba(26, 39, 68, 0.08);
}

.password-box__error {
  font-size: 0.8rem;
  color: #C0392B;
  margin-top: var(--space-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.password-box__error.visible {
  opacity: 1;
}

.password-box .btn {
  margin-top: var(--space-md);
  width: 100%;
}

/* --- Fade Transition --- */
.page-fade {
  animation: pageFadeIn 0.6s ease-out forwards;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Shake animation for wrong password */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(6px); }
}

.shake {
  animation: shake 0.4s ease;
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* --- Page Header (inner pages) --- */
.page-header {
  padding: calc(72px + var(--space-2xl)) 0 var(--space-xl);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
}

.page-header p {
  margin-top: var(--space-sm);
  font-size: clamp(1rem, 1.2vw, 1.1rem);
}

/* --- Stat Block --- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stat {
  text-align: center;
}

.stat__value {
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-navy);
  line-height: 1.1;
}

.stat__label {
  font-size: 0.78rem;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-mid-grey);
  margin-top: var(--space-xs);
}

/* --- Quote Block --- */
.quote-block {
  padding: var(--space-xl);
  background: var(--color-white);
  border-left: 3px solid var(--color-navy);
  border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
  margin: var(--space-xl) 0;
}

.quote-block blockquote {
  font-size: clamp(1.1rem, 1.5vw, 1.3rem);
  font-weight: var(--font-weight-light);
  font-style: italic;
  color: var(--color-navy);
  line-height: 1.7;
}

.quote-block cite {
  display: block;
  margin-top: var(--space-sm);
  font-size: 0.85rem;
  font-style: normal;
  color: var(--color-mid-grey);
}

/* --- Media Card --- */
.media-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.media-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: 0 6px 24px rgba(26, 39, 68, 0.05);
}

.media-card__date {
  font-size: 0.78rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-mid-grey);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  padding-top: 2px;
}

.media-card__body h3 {
  margin-bottom: var(--space-xs);
}

.media-card__body p {
  font-size: 0.9rem;
}

.media-card__source {
  display: inline-block;
  margin-top: var(--space-sm);
  font-size: 0.78rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-accent);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .content-grid--reverse {
    direction: ltr;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-md);
  }

  .footer__contact {
    text-align: center;
  }

  .footer__social {
    justify-content: center;
  }

  .media-card {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
}

@media (max-width: 768px) {
  .nav__links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(247, 247, 245, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) 0;
    gap: var(--space-sm);
    transform: translateY(-120%);
    transition: transform var(--transition-base);
    border-bottom: 1px solid var(--color-border);
  }

  .nav__links.open {
    transform: translateY(0);
  }

  .nav__toggle {
    display: flex;
  }

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

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

  .hero {
    min-height: 70vh;
  }
}

@media (max-width: 480px) {
  .stat-row {
    grid-template-columns: 1fr;
  }

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