/* ==========================================================================
   COMPONENTS.CSS — Reusable UI Components
   Prateek Shukla — prateekshukla.in
   ========================================================================== */

/* ==========================================================================
   HEADER
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: var(--border-subtle);
  height: var(--header-height);
  transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.99);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.header__logo-img {
  height: 44px;
  width: auto;
}

@media (min-width: 768px) {
  .header__logo-img {
    height: 50px;
  }
}

.header__nav {
  display: none;
}

@media (min-width: 1024px) {
  .header__nav {
    display: flex;
    align-items: center;
  }
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.header__nav-link:hover {
  color: var(--color-navy);
  background-color: var(--color-gray-50);
}

.header__nav-link--active {
  color: var(--color-navy);
  font-weight: 600;
}

.header__nav-link--cta {
  background-color: var(--color-blue);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-left: var(--space-xs);
}

.header__nav-link--cta:hover {
  background-color: var(--color-blue-dark);
  color: var(--color-white);
}

/* Hamburger Button */
.header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  z-index: 1001;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.header__menu-btn:hover {
  background-color: var(--color-gray-100);
}

.header__menu-btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

@media (min-width: 1024px) {
  .header__menu-btn {
    display: none;
  }
}

.header__menu-icon {
  position: relative;
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: 1px;
  transition: background-color var(--transition-fast);
}

.header__menu-icon::before,
.header__menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-navy);
  border-radius: 1px;
  transition: transform var(--transition-base), top var(--transition-base);
}

.header__menu-icon::before {
  top: -7px;
}

.header__menu-icon::after {
  top: 7px;
}

/* Hamburger → X animation */
.header__menu-btn[aria-expanded="true"] .header__menu-icon {
  background-color: transparent;
}

.header__menu-btn[aria-expanded="true"] .header__menu-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.header__menu-btn[aria-expanded="true"] .header__menu-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ==========================================================================
   MOBILE MENU
   ========================================================================== */
.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  height: calc(100vh - var(--header-height));
  height: calc(100dvh - var(--header-height));
  z-index: 999;
  background-color: var(--color-white);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  visibility: hidden;
  border-top: var(--border-subtle);
  box-shadow: var(--shadow-xl);
}

.mobile-menu[aria-hidden="false"],
.mobile-menu.is-active {
  transform: translateX(0);
  visibility: visible;
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none !important;
  }
}

.mobile-menu__inner {
  padding: var(--space-xl) var(--space-lg) var(--space-3xl);
}

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

.mobile-menu__link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: var(--space-sm) var(--space-md);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.mobile-menu__link:hover,
.mobile-menu__link:focus {
  color: var(--color-navy);
  background-color: var(--color-gray-50);
}

.mobile-menu__link--active {
  color: var(--color-navy);
  font-weight: 600;
  background-color: var(--color-bg);
}

.mobile-menu__link--cta {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-md);
  background-color: var(--color-blue);
  color: var(--color-white);
  text-align: center;
  border-radius: var(--radius-full);
  font-weight: 600;
  padding: var(--space-sm) var(--space-xl);
}

.mobile-menu__link--cta:hover,
.mobile-menu__link--cta:focus {
  background-color: var(--color-blue-dark);
  color: var(--color-white);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* Primary */
.btn--primary {
  background-color: var(--color-blue);
  color: var(--color-white);
  border-color: var(--color-blue);
}

.btn--primary:hover {
  background-color: var(--color-blue-dark);
  border-color: var(--color-blue-dark);
  color: var(--color-white);
}

/* Secondary */
.btn--secondary {
  background-color: var(--color-navy);
  color: var(--color-white);
  border-color: var(--color-navy);
}

.btn--secondary:hover {
  background-color: var(--color-navy-dark);
  border-color: var(--color-navy-dark);
  color: var(--color-white);
}

/* Outline */
.btn--outline {
  background-color: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

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

/* Outline White (on dark backgrounds) */
.btn--outline-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}

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

/* Button with arrow */
.btn__arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* Large */
.btn--lg {
  padding: var(--space-md) var(--space-2xl);
  font-size: 1.0625rem;
}

/* Small */
.btn--sm {
  padding: var(--space-2xs) var(--space-md);
  font-size: var(--fs-small);
}

/* ==========================================================================
   CARDS
   ========================================================================== */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  border: var(--border-subtle);
  padding: var(--space-xl);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

@media (prefers-reduced-motion: reduce) {
  .card:hover {
    transform: none;
  }
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(20, 184, 166, 0.1);
  color: var(--color-teal);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  flex-shrink: 0;
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card__title {
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--color-gray-600);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2xs);
  margin-top: var(--space-md);
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-blue);
}

.card__link:hover {
  color: var(--color-navy);
}

/* Ideas Card */
.card--idea {
  display: flex;
  flex-direction: column;
}

.card--idea .card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: var(--fs-caption);
  color: var(--color-gray-400);
}

.card--idea .card__category {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-teal);
}

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

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-teal), var(--color-blue), var(--color-navy));
  border-radius: var(--radius-full);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-2xl);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: calc(-1 * var(--space-xl) - 5px);
  top: 4px;
  width: 12px;
  height: 12px;
  background-color: var(--color-teal);
  border: 2px solid var(--color-white);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.2);
}

.timeline__item--major .timeline__dot {
  width: 16px;
  height: 16px;
  left: calc(-1 * var(--space-xl) - 7px);
  background-color: var(--color-blue);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.timeline__period {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-teal);
  margin-bottom: var(--space-2xs);
}

.timeline__title {
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  color: var(--color-navy);
  margin-bottom: var(--space-2xs);
}

.timeline__subtitle {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-gray-500);
  margin-bottom: var(--space-sm);
}

.timeline__description {
  color: var(--color-gray-600);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  margin-top: var(--space-sm);
}

@media (min-width: 768px) {
  .timeline {
    padding-left: var(--space-3xl);
  }

  .timeline__dot {
    left: calc(-1 * var(--space-3xl) - 5px);
  }

  .timeline__item--major .timeline__dot {
    left: calc(-1 * var(--space-3xl) - 7px);
  }
}

/* ==========================================================================
   FORMS
   ========================================================================== */
.form__group {
  margin-bottom: var(--space-lg);
}

.form__label {
  display: block;
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-xs);
}

.form__label--required::after {
  content: ' *';
  color: #ef4444;
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--color-text);
  background-color: var(--color-white);
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--color-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-gray-400);
}

.form__input--error,
.form__textarea--error {
  border-color: #ef4444;
}

.form__input--error:focus,
.form__textarea--error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form__textarea {
  min-height: 140px;
  resize: vertical;
}

.form__error {
  display: none;
  font-size: var(--fs-caption);
  color: #ef4444;
  margin-top: var(--space-2xs);
}

.form__error--visible {
  display: block;
}

.form__help {
  font-size: var(--fs-caption);
  color: var(--color-gray-400);
  margin-top: var(--space-2xs);
}

/* Form status messages */
.form__status {
  display: none;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--fs-small);
  font-weight: 500;
  margin-top: var(--space-lg);
}

.form__status--success {
  display: block;
  background-color: rgba(20, 184, 166, 0.1);
  color: var(--color-teal-dark);
  border: 1px solid rgba(20, 184, 166, 0.2);
}

.form__status--error {
  display: block;
  background-color: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Turnstile widget */
.form__turnstile {
  margin-bottom: var(--space-lg);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background-color: var(--color-navy);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (min-width: 768px) {
  .footer__inner {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
  }
}

.footer__logo {
  width: 160px;
  height: auto;
  margin-bottom: var(--space-md);
  filter: brightness(0) invert(1);
}

.footer__tagline {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.04em;
}

.footer__heading {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__nav-list a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer__social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--fs-small);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-teal-light);
}

.footer__social-link svg {
  width: 20px;
  height: 20px;
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: var(--fs-caption);
  color: rgba(255, 255, 255, 0.5);
}

@media (min-width: 768px) {
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__legal {
  display: flex;
  gap: var(--space-lg);
}

.footer__legal a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   HIGHLIGHT / STAT CARDS
   ========================================================================== */
.stat-card {
  text-align: center;
  padding: var(--space-xl);
}

.stat-card__value {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  color: var(--color-teal);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.stat-card__label {
  font-size: var(--fs-small);
  color: var(--color-gray-500);
  font-weight: 500;
}

.section--navy .stat-card__label {
  color: rgba(255, 255, 255, 0.7);
}

/* ==========================================================================
   BREADCRUMBS
   ========================================================================== */
.breadcrumb {
  padding: var(--space-md) 0;
  font-size: var(--fs-small);
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-gray-400);
}

.breadcrumb__item a {
  color: var(--color-gray-500);
  text-decoration: none;
}

.breadcrumb__item a:hover {
  color: var(--color-blue);
}

.breadcrumb__separator {
  color: var(--color-gray-300);
  font-size: var(--fs-caption);
}

/* ==========================================================================
   IDEAS FILTER (category tabs)
   ========================================================================== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-2xl);
  justify-content: center;
}

.filter-bar__btn {
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-gray-500);
  background: none;
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-bar__btn:hover {
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.filter-bar__btn--active {
  color: var(--color-white);
  background-color: var(--color-navy);
  border-color: var(--color-navy);
}

.filter-bar__btn:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

/* ==========================================================================
   PAGE HEADER (inner pages hero)
   ========================================================================== */
.page-header {
  padding: calc(var(--header-height) + var(--space-3xl)) 0 var(--space-3xl);
  background-color: var(--color-bg);
}

@media (min-width: 768px) {
  .page-header {
    padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
  }
}

.page-header__inner {
  max-width: 700px;
}

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

.page-header__subtitle {
  font-size: 1.0625rem;
  color: var(--color-gray-600);
  line-height: var(--lh-body);
}

/* ==========================================================================
   INLINE SVG ICON HELPER
   ========================================================================== */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon--sm { width: 16px; height: 16px; }
.icon--md { width: 20px; height: 20px; }
.icon--lg { width: 24px; height: 24px; }

/* ==========================================================================
   FADE-IN ANIMATION (scroll reveal)
   ========================================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in--visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}