/* ============================================
   Rayran — Web Development Agency
   Design: Deep navy + warm amber accent
   Typography: Instrument Serif + DM Sans
   ============================================ */

:root {
  --color-bg: #0a0f1a;
  --color-bg-elevated: #111827;
  --color-bg-card: #151d2e;
  --color-bg-card-hover: #1a2438;
  --color-surface: #1e293b;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(232, 168, 73, 0.3);

  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-dim: #64748b;

  --color-accent: #e8a849;
  --color-accent-light: #f0c06a;
  --color-accent-dark: #c48a2a;
  --color-accent-glow: rgba(232, 168, 73, 0.15);

  --color-success: #34d399;
  --color-error: #f87171;

  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--color-accent-glow);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  --header-height: 4.5rem;
  --container-max: 72rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 9999;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  top: var(--space-md);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 1.75rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.btn--primary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

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

.btn--full {
  width: 100%;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(10, 15, 26, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.header--scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(10, 15, 26, 0.95);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-md);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 400;
}

.logo__text {
  letter-spacing: -0.02em;
}

/* Navigation */
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav__link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link:focus-visible::after {
  width: 100%;
}

.nav__link--cta {
  padding: 0.5rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-full);
  font-weight: 600;
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  background: var(--color-accent-light);
  color: var(--color-bg);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.hero__glow--1 {
  width: 500px;
  height: 500px;
  background: var(--color-accent);
  top: -10%;
  right: -10%;
  opacity: 0.12;
}

.hero__glow--2 {
  width: 400px;
  height: 400px;
  background: #3b82f6;
  bottom: 10%;
  left: -5%;
  opacity: 0.08;
}

.hero__content {
  position: relative;
  padding-block: var(--space-4xl);
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}

.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 16ch;
  margin-bottom: var(--space-lg);
}

.hero__title em {
  font-style: italic;
  color: var(--color-accent);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 42ch;
  margin-bottom: var(--space-2xl);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--color-border);
  max-width: 36rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat__number {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1;
}

.stat__suffix {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.75rem);
  color: var(--color-accent);
}

.stat__label {
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  margin-top: var(--space-xs);
}

/* Sections */
.section {
  padding-block: var(--space-4xl);
}

.section__header {
  text-align: center;
  max-width: 40rem;
  margin-inline: auto;
  margin-bottom: var(--space-3xl);
}

.section__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-md);
}

.section__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.section__desc {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

/* Services */
.services {
  background: var(--color-bg-elevated);
}

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

.service-card {
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.service-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-card__icon {
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.service-card__icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.service-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.service-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* About */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about__frame {
  position: relative;
  padding: var(--space-2xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.about__code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.875rem;
  line-height: 1.8;
}

.code-kw { color: #c084fc; }
.code-var { color: #60a5fa; }
.code-str { color: #34d399; }

.about__badge {
  position: absolute;
  bottom: -1.5rem;
  right: -1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-lg) var(--space-xl);
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.about__badge-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 1;
}

.about__badge-text {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.about__text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  font-size: 1.0625rem;
}

.about__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about__list li {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.about__check {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-glow);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 2px;
}

.about__list strong {
  display: block;
  font-weight: 600;
  margin-bottom: 2px;
}

.about__list span {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* Portfolio */
.portfolio {
  background: var(--color-bg-elevated);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.project-card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.project-card__image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.project-card__image--1 {
  background: linear-gradient(135deg, #1a1a2e 0%, #e94560 100%);
}

.project-card__image--2 {
  background: linear-gradient(135deg, #0f3460 0%, #16c79a 100%);
}

.project-card__image--3 {
  background: linear-gradient(135deg, #2d132c 0%, #ee4540 100%);
}

.project-card__image--4 {
  background: linear-gradient(135deg, #1b262c 0%, #3282b8 100%);
}

.project-card__tag {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  padding: 0.25rem 0.75rem;
  background: rgba(10, 15, 26, 0.7);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
}

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

.project-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.project-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.project-card__meta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.project-card__meta span {
  padding: 0.2rem 0.6rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

/* Process */
.process__timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xl);
  position: relative;
}

.process-step {
  position: relative;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.process-step:hover {
  border-color: var(--color-border-hover);
}

.process-step__num {
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: var(--space-md);
}

.process-step__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.process-step__desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* Contact */
.contact {
  background: var(--color-bg-elevated);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact__text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact__details li {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.contact__icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-glow);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.contact__icon svg {
  width: 1.125rem;
  height: 1.125rem;
}

.contact__details strong {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-dim);
  margin-bottom: 2px;
}

.contact__details a {
  color: var(--color-text);
  transition: color var(--transition-fast);
}

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

.contact-form {
  padding: var(--space-2xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-dim);
}

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

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: var(--color-error);
}

.form-feedback {
  margin-top: var(--space-md);
  font-size: 0.875rem;
  text-align: center;
  min-height: 1.25rem;
}

.form-feedback.success {
  color: var(--color-success);
}

.form-feedback.error {
  color: var(--color-error);
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--space-3xl);
  padding-block: var(--space-3xl);
}

.footer__tagline {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-top: var(--space-md);
  max-width: 28ch;
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer__col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-dim);
  margin-bottom: var(--space-md);
}

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

.footer__col a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-lg);
}

.footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children */
.services__grid .reveal:nth-child(2) { transition-delay: 0.05s; }
.services__grid .reveal:nth-child(3) { transition-delay: 0.1s; }
.services__grid .reveal:nth-child(4) { transition-delay: 0.15s; }
.services__grid .reveal:nth-child(5) { transition-delay: 0.2s; }
.services__grid .reveal:nth-child(6) { transition-delay: 0.25s; }

.portfolio__grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.portfolio__grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.portfolio__grid .reveal:nth-child(4) { transition-delay: 0.24s; }

.process__timeline .reveal:nth-child(2) { transition-delay: 0.1s; }
.process__timeline .reveal:nth-child(3) { transition-delay: 0.2s; }
.process__timeline .reveal:nth-child(4) { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 900px) {
  .about__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .about__visual {
    order: -1;
  }

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

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 15, 26, 0.98);
    backdrop-filter: blur(16px);
    padding: var(--space-2xl);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xl);
  }

  .nav__link {
    font-size: 1.25rem;
  }

  .hero__stats {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

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

  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}