/* ============================================
   Iris Cai — Global Styles
   ============================================ */

:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-light: #555555;
  --color-accent: #8c7b6b;
  --color-border: #e0d8d0;
  --color-bg-warm: #f9f6f2;
  --color-bg-dark: #2c2c2c;
  --color-white: #ffffff;
  --font-serif: "Cormorant Garamond", "Georgia", serif;
  --font-sans: "Montserrat", "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
  --max-width-narrow: 780px;
  --transition: 0.3s ease;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
  list-style: none;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.3;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: 0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: 0.02em;
}

h3 {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
}

p {
  font-size: 0.95rem;
  margin-bottom: 1.2em;
  color: var(--color-text-light);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 10px rgba(0, 0, 0, 0.04);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo img {
  height: 40px;
  width: auto;
}

.site-logo-text {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

/* Desktop Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.main-nav a {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  position: relative;
  padding-bottom: 2px;
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    transition: right var(--transition);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
  }

  .main-nav.open {
    right: 0;
  }

  .main-nav a {
    font-size: 0.9rem;
  }
}

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

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  position: relative;
  z-index: 0;
}

.hero::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: url("../images/IRISCAI_Hero.webp") center / cover no-repeat;
  z-index: -2;
}

.hero::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.45);
  z-index: -1;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
  margin-bottom: 0.5rem;
  color: var(--color-white);
}

.hero h2,
.hero p.hero-subtitle {
  font-family: var(--font-sans);
  font-size: clamp(0.9rem, 2.5vw, 1.05rem);
  letter-spacing: 0.25em;
  text-transform: lowercase;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 300;
  margin-top: 0.5rem;
  margin-bottom: 0;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  transition: color var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.scroll-indicator::after {
  content: "";
  width: 1px;
  height: 40px;
  background: rgba(255, 255, 255, 0.7);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

.scroll-indicator:hover {
  color: var(--color-white);
}

/* ============================================
   About Section
   ============================================ */

.about {
  padding: 6rem 2rem;
  background: var(--color-bg);
  position: relative;
  z-index: 1;
}

.about-inner {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.about h1,
.about h2 {
  text-align: center;
  margin-bottom: 2.5rem;
  position: relative;
}

.about h1::after,
.about h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}

.about p {
  font-size: 0.95rem;
  line-height: 1.9;
}

/* ============================================
   Contact Section (Home Page)
   ============================================ */

.contact-home {
  padding: 6rem 2rem;
  background: var(--color-bg-warm);
  position: relative;
  z-index: 1;
  text-align: center;
}

.contact-home h1,
.contact-home h2 {
  margin-bottom: 1.5rem;
}

.contact-home h1::after,
.contact-home h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}

/* ============================================
   Contact Page
   ============================================ */

.contact-page {
  padding: 8rem 2rem 4rem;
  min-height: 80vh;
}

.contact-page-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.contact-image img {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.contact-info h1 {
  margin-bottom: 2rem;
}

.contact-info h1::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: 1rem 0 0;
}

.contact-details {
  margin-top: 1.5rem;
}

.contact-details p {
  margin-bottom: 0.8rem;
  font-size: 0.95rem;
}

.contact-details a {
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.contact-details a:hover {
  border-bottom-color: var(--color-accent);
}

.contact-form {
  margin-top: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem 0;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  border: none;
  border-bottom: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.btn {
  display: inline-block;
  padding: 0.8rem 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 500;
  border: 1px solid var(--color-text);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

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

@media (max-width: 768px) {
  .contact-page-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .contact-image img {
    height: 300px;
  }
}

/* ============================================
   Find Your Spark Page
   ============================================ */

.spark-page {
  padding: 8rem 2rem 4rem;
}

.spark-inner {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.spark-inner h1 {
  text-align: center;
  margin-bottom: 2rem;
}

.spark-inner h1::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}

.spark-inner p {
  line-height: 1.9;
}

.spark-inner a {
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.spark-inner a:hover {
  border-bottom-color: var(--color-accent);
}

.spark-downloads {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2.5rem 0;
  align-items: center;
}

.spark-downloads .btn {
  min-width: 280px;
  text-align: center;
}

.spark-quote {
  margin-top: 3rem;
  padding: 2.5rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-warm);
}

.spark-quote blockquote {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-style: italic;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.spark-quote cite {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-style: normal;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
}

/* ============================================
   Blog Page
   ============================================ */

.blog-page {
  padding: 8rem 2rem 4rem;
}

.blog-page > h1 {
  text-align: center;
  margin-bottom: 3rem;
}

.blog-page > h1::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: 1rem auto 0;
}

.blog-list {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.blog-post {
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.blog-post:last-child {
  border-bottom: none;
}

.blog-post h2 {
  margin-bottom: 0.8rem;
}

.blog-post h2 a {
  color: var(--color-text);
  transition: color var(--transition);
}

.blog-post h2 a:hover {
  color: var(--color-accent);
}

.blog-post .excerpt {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

.blog-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
}

.blog-meta .author {
  font-weight: 500;
  color: var(--color-text);
}

.blog-meta .separator {
  margin: 0 0.3rem;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.blog-tags a,
.blog-tags span {
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  transition: all var(--transition);
}

.blog-tags a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.read-more {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-accent);
  margin-top: 0.5rem;
  position: relative;
}

.read-more::after {
  content: " \2192";
  transition: transform var(--transition);
  display: inline-block;
}

.read-more:hover::after {
  transform: translateX(4px);
}

/* ============================================
   Blog Article Page
   ============================================ */

.blog-article {
  padding: 8rem 2rem 4rem;
}

.blog-article-inner {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.blog-article-header {
  margin-bottom: 3rem;
  text-align: center;
}

.blog-article-header h1 {
  margin-bottom: 1rem;
}

.blog-article-header h1::after {
  content: "";
  display: block;
  width: 60px;
  height: 1px;
  background: var(--color-accent);
  margin: 1.2rem auto 0;
}

.blog-article-header .blog-meta {
  justify-content: center;
  margin-top: 1rem;
}

.blog-article-header .blog-tags {
  justify-content: center;
  margin-top: 1rem;
}

.blog-article-body {
  font-size: 1rem;
  line-height: 2;
}

.blog-article-body p {
  font-size: 1rem;
  line-height: 2;
  margin-bottom: 1.5em;
  color: var(--color-text-light);
}

.blog-article-body h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.blog-article-body h3 {
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}

.blog-article-body blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-warm);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-style: italic;
  line-height: 1.8;
  color: var(--color-text);
}

.blog-article-body ul,
.blog-article-body ol {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
  color: var(--color-text-light);
}

.blog-article-body li {
  list-style: disc;
  margin-bottom: 0.5rem;
  font-size: 1rem;
  line-height: 1.8;
}

.blog-article-body ol li {
  list-style: decimal;
}

.blog-article-body a {
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.blog-article-body a:hover {
  border-bottom-color: var(--color-accent);
}

.blog-article-body img {
  margin: 2rem auto;
  border-radius: 2px;
}

.blog-article-body figcaption {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: -1rem;
  margin-bottom: 2rem;
}

.blog-article-nav {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.blog-article-nav .back-to-blog {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-accent);
}

.blog-article-nav .back-to-blog:hover {
  color: var(--color-text);
}

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

.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 3rem 2rem;
  position: relative;
  z-index: 1;
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.footer-location {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.3rem;
}

.footer-email a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition);
}

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

.footer-social {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.footer-social a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: color var(--transition);
}

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

.footer-copy {
  font-size: 0.75rem;
  margin-top: 1.5rem;
  color: rgba(255, 255, 255, 0.35);
}

/* ============================================
   Utility & Animation
   ============================================ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

@media (max-width: 600px) {
  .header-inner {
    padding: 0.8rem 1.2rem;
  }

  .hero {
    padding: 5rem 1.5rem 3rem;
  }

  .about,
  .contact-home {
    padding: 4rem 1.5rem;
  }

  .spark-page,
  .blog-page {
    padding: 6rem 1.5rem 3rem;
  }

  .blog-post {
    padding: 2rem 0;
  }

  .site-footer {
    padding: 2.5rem 1.5rem;
  }
}