/**
 * ==========================================================================
 * IDENTIK - Main Stylesheet
 * ==========================================================================
 *
 * Table of Contents:
 * 0. Font Face Declarations
 * 1. CSS Custom Properties (Design Tokens)
 * 2. Reset & Base Styles
 * 3. Typography System
 * 4. Layout & Grid
 * 5. Components (BEM)
 *    5.1 Header
 *    5.2 Hero
 *    5.3 About
 *    5.4 Services
 *    5.5 Contact
 *    5.6 Footer
 * 6. Utilities
 * 7. Animations
 * 8. Media Queries
 */


/* ==========================================================================
   0. Font Face Declarations
   ========================================================================== */

/* Monument Extended - Display/Headings */
@font-face {
  font-family: 'Monument Extended';
  src: url('../assets/fonts/monument-regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* PP Neue Montreal - Body Text */
@font-face {
  font-family: 'PP Neue Montreal';
  src: url('../assets/fonts/montreal-book.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'PP Neue Montreal';
  src: url('../assets/fonts/montreal-medium.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* IBM Plex Mono - Monospace */
@font-face {
  font-family: 'IBM Plex Mono';
  src: url('../assets/fonts/ibm-plex-mono.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}


/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ==========================================================================
   Using a modular scale with ratio 1.25 (Major Third)
   Base size: 18px
*/

:root {
  /* Color Palette - Light Theme (default) */
  --color-bg: #fafaf9;
  --color-bg-alt: #f5f5f4;
  --color-text: #1c1917;
  --color-text-muted: #57534e;
  --color-text-subtle: #a8a29e;
  --color-accent: #0c0a09;
  --color-accent-hover: #292524;
  --color-highlight: #c2410c;
  --color-highlight-hover: #9a3412;
  --color-border: #e7e5e4;
  --color-border-dark: #d6d3d1;

  /* Typography - Font Families */
  --font-heading: 'Monument Extended', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'PP Neue Montreal', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Fira Code', monospace;

  /* Typography - Type Scale (1.25 ratio - Major Third) */
  --text-xs: 0.64rem;      /* 11.52px */
  --text-sm: 0.8rem;       /* 14.4px */
  --text-base: 1rem;       /* 18px */
  --text-md: 1.25rem;      /* 22.5px */
  --text-lg: 1.563rem;     /* 28.13px */
  --text-xl: 1.953rem;     /* 35.16px */
  --text-2xl: 2.441rem;    /* 43.95px */
  --text-3xl: 3.052rem;    /* 54.93px */
  --text-4xl: 3.815rem;    /* 68.66px */
  --text-5xl: 4.768rem;    /* 85.83px */

  /* Typography - Line Heights */
  --leading-none: 1;
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 2;

  /* Typography - Letter Spacing */
  --tracking-tighter: -0.05em;
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
  --tracking-widest: 0.1em;

  /* Typography - Font Weights */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Spacing Scale */
  --space-1: 0.25rem;      /* 4px */
  --space-2: 0.5rem;       /* 8px */
  --space-3: 0.75rem;      /* 12px */
  --space-4: 1rem;         /* 16px */
  --space-5: 1.25rem;      /* 20px */
  --space-6: 1.5rem;       /* 24px */
  --space-8: 2rem;         /* 32px */
  --space-10: 2.5rem;      /* 40px */
  --space-12: 3rem;        /* 48px */
  --space-16: 4rem;        /* 64px */
  --space-20: 5rem;        /* 80px */
  --space-24: 6rem;        /* 96px */
  --space-32: 8rem;        /* 128px */
  --space-40: 10rem;       /* 160px */

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 720px;
  --gutter: clamp(1.5rem, 4vw, 3rem);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-slower: 800ms;

  /* Borders */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-full: 9999px;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #0c0a09;
  --color-bg-alt: #1c1917;
  --color-text: #fafaf9;
  --color-text-muted: #a8a29e;
  --color-text-subtle: #78716c;
  --color-accent: #fafaf9;
  --color-accent-hover: #e7e5e4;
  --color-highlight: #ea580c;
  --color-highlight-hover: #f97316;
  --color-border: #292524;
  --color-border-dark: #44403c;
}



/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 112.5%; /* 18px base */
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Selection */
::selection {
  background-color: var(--color-highlight);
  color: #fafaf9;
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}


/* ==========================================================================
   3. Typography System
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-medium);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text);
}

h1 {
  font-size: clamp(var(--text-3xl), 8vw, var(--text-5xl));
  letter-spacing: var(--tracking-tighter);
}

h2 {
  font-size: clamp(var(--text-2xl), 5vw, var(--text-3xl));
}

h3 {
  font-size: var(--text-xl);
}

h4 {
  font-size: var(--text-lg);
}

h5 {
  font-size: var(--text-md);
}

h6 {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
}

p {
  max-width: 65ch;
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

strong, b {
  font-weight: var(--font-semibold);
}

small {
  font-size: var(--text-sm);
}

/* Balanced text wrapping for headings */
h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
}

/* Pretty text wrapping for paragraphs */
p {
  text-wrap: pretty;
}


/* ==========================================================================
   4. Layout & Grid
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

.section {
  padding-block: var(--space-24);
}

.section--large {
  padding-block: var(--space-32);
}

.grid {
  display: grid;
  gap: var(--gutter);
}

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

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 768px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: 1fr;
  }
}


/* ==========================================================================
   5. Components (BEM)
   ========================================================================== */


/* --------------------------------------------------------------------------
   5.1 Header
   -------------------------------------------------------------------------- */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-6) 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.header--scrolled {
  padding: var(--space-4) 0;
  background-color: rgba(250, 250, 249, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

[data-theme="dark"] .header--scrolled {
  background-color: rgba(12, 10, 9, 0.9);
}

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

.header__logo {
  display: flex;
  align-items: center;
}

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

.header__nav {
  display: flex;
  gap: var(--space-8);
  align-items: center;
}

.header__link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-highlight);
  transition: width var(--duration-normal) var(--ease-out);
}

.header__link:hover {
  color: var(--color-text);
}

.header__link:hover::after {
  width: 100%;
}

/* Mobile menu toggle */
.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 101;
}

.header__toggle-line {
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--duration-fast) var(--ease-out);
}

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

  .header__nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-8);
    background-color: var(--color-bg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
    z-index: 100;
  }

  .header__nav--open {
    opacity: 1;
    visibility: visible;
  }

  .header__nav--open .header__link {
    font-size: var(--text-lg);
  }

  .header--nav-open .header__toggle-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .header--nav-open .header__toggle-line:nth-child(2) {
    opacity: 0;
  }

  .header--nav-open .header__toggle-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }
}


/* --------------------------------------------------------------------------
   5.2 Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  min-height: 100svh;
  padding-top: var(--space-20);
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.5;
}

.hero > .container {
  position: relative;
  z-index: 1;
}

.hero__content {
  max-width: 900px;
}

.hero__label {
  display: inline-block;
  margin-bottom: var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-highlight);
}

.hero__title {
  margin-bottom: var(--space-8);
}

.hero__title-line {
  display: block;
  overflow: hidden;
}

.hero__description {
  max-width: 550px;
  margin-bottom: var(--space-10);
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
  text-wrap: balance;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-bg);
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
}

.hero__cta:hover {
  color: var(--color-bg);
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
}

.hero__cta-arrow {
  width: 20px;
  height: 20px;
  transition: transform var(--duration-fast) var(--ease-out);
}

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

/* --------------------------------------------------------------------------
   Buttons (.button)
   Magnetic buttons with filler animation (Codrops style)
   -------------------------------------------------------------------------- */

.button {
  --button-bg: var(--color-accent);
  --button-text: var(--color-bg);
  --button-text-hover: var(--color-bg);
  --button-filler: var(--color-accent-hover);
  --button-stroke: transparent;
  --button-stroke-hover: transparent;
  --button-stroke-width: 0;
  --button-stroke-width-hover: 0;
  --button-border-radius: var(--radius-full);

  position: relative;
  cursor: pointer;
  -moz-appearance: none;
  -webkit-appearance: none;
  border-width: var(--button-stroke-width);
  border-color: var(--button-stroke);
  border-style: solid;
  color: var(--button-text);
  background: var(--button-bg);
  border-radius: var(--button-border-radius);
  min-width: 10rem;
  height: 3.5rem;
  padding: 0 var(--space-8);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--font-regular);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  text-decoration: none;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  will-change: transform;
}

.button:focus,
.button--hover {
  outline: none;
  border-width: var(--button-stroke-width-hover);
  border-color: var(--button-stroke-hover);
  color: var(--button-text-hover);
}

.button--primary:focus:not(.button--hover),
.button--primary:active:not(.button--hover) {
  color: var(--color-bg);
}

.button__filler {
  background: var(--button-filler);
  position: absolute;
  width: 150%;
  height: 200%;
  border-radius: 50%;
  top: -50%;
  left: -25%;
  transform: translate3d(0, 75%, 0);
  pointer-events: none;
}

.button__text,
.button__text-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  gap: var(--space-3);
}

.button__text-inner i {
  font-size: 20px;
  line-height: 1;
}

/* Primary variant (black button, white reveal with dark text) */
.button--primary {
  --button-bg: var(--color-accent);
  --button-text: var(--color-bg);
  --button-text-hover: var(--color-accent);
  --button-filler: var(--color-bg);
  --button-stroke: var(--color-accent);
  --button-stroke-hover: var(--color-accent);
  --button-stroke-width: 2px;
  --button-stroke-width-hover: 2px;
}

/* Secondary variant (light bg for dark sections) */
.button--secondary {
  --button-bg: #fafaf9;
  --button-text: #0c0a09;
  --button-text-hover: #0c0a09;
  --button-filler: #e7e5e4;
}

/* Focus visible state */
.button:focus-visible {
  outline: 2px solid var(--button-text);
  outline-offset: 4px;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-10);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.hero__scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-text-subtle), transparent);
  animation: scroll-hint 2s var(--ease-in-out) infinite;
}

@keyframes scroll-hint {
  0%, 100% {
    transform: scaleY(1);
    transform-origin: top;
  }
  50% {
    transform: scaleY(0.5);
    transform-origin: top;
  }
}


/* --------------------------------------------------------------------------
   5.3 About
   -------------------------------------------------------------------------- */

.about {
  background-color: var(--color-bg-alt);
}

.about__header {
  margin-bottom: var(--space-16);
}

.about__label {
  display: block;
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-highlight);
}

.about__title {
  max-width: 800px;
}

.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.about__text p {
  margin-bottom: var(--space-6);
  color: var(--color-text-muted);
}

.about__text p:first-child {
  font-size: var(--text-md);
  color: var(--color-text);
}

.about__skills-title {
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.about__skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  list-style: none;
}

.about__skill {
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
}

.about__skill:hover {
  border-color: var(--color-highlight);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .about__content {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
}


/* --------------------------------------------------------------------------
   5.4 Services
   -------------------------------------------------------------------------- */

.services__header {
  margin-bottom: var(--space-16);
  text-align: center;
}

.services__label {
  display: block;
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-highlight);
}

.services__title {
  margin-bottom: var(--space-6);
}

.services__description {
  max-width: 600px;
  margin-inline: auto;
  color: var(--color-text-muted);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-6);
}

.service-card {
  display: flex;
  flex-direction: column;
  grid-column: span 2;
  position: relative;
  padding: var(--space-10);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out);
  overflow: hidden;
}

.service-card:nth-child(4),
.service-card:nth-child(5) {
  grid-column: span 3;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--color-highlight);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}

.service-card:hover {
  border-color: var(--color-border-dark);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.1);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card__icon {
  font-size: 48px;
  line-height: 1;
  margin-bottom: var(--space-6);
  color: var(--color-text);
  transition: color var(--duration-normal) var(--ease-out);
}

.service-card:hover .service-card__icon {
  color: var(--color-highlight);
}

.service-card__title {
  margin-bottom: var(--space-4);
  font-size: var(--text-lg);
}

.service-card__description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.service-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-6);
}

.service-card__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-card,
  .service-card:nth-child(4),
  .service-card:nth-child(5) {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .services__grid {
    grid-template-columns: 1fr;
  }
}


/* --------------------------------------------------------------------------
   5.5 Contact
   -------------------------------------------------------------------------- */

.contact {
  background-color: #0c0a09;
  color: #fafaf9;
}

.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

.contact__label {
  display: block;
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: #ea580c;
}

.contact__title {
  color: #fafaf9;
  margin-bottom: var(--space-6);
}

.contact__description {
  max-width: 60%;
  color: #a8a29e;
  margin-bottom: var(--space-8);
}

@media (max-width: 640px) {
  .contact__description {
    max-width: 100%;
  }
}

.contact__email {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: clamp(var(--text-lg), 3vw, var(--text-2xl));
  font-weight: var(--font-medium);
  color: #fafaf9;
  border-bottom: 2px solid transparent;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.contact__email:hover {
  color: #fafaf9;
  border-color: #fafaf9;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.form-group {
  position: relative;
}

.form-group__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-2);
}

.form-group__label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: #a8a29e;
}

.form-group__input,
.form-group__textarea {
  width: 100%;
  padding: var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: #fafaf9;
  background-color: transparent;
  border: 1px solid #a8a29e;
  border-radius: var(--radius-md);
  transition: border-color var(--duration-fast) var(--ease-out);
}

.form-group__input::placeholder,
.form-group__textarea::placeholder {
  color: #a8a29e;
}

.form-group__input:focus,
.form-group__textarea:focus {
  outline: none;
  border-color: #fafaf9;
}

.form-group__textarea {
  min-height: 150px;
  resize: vertical;
}

.contact__submit {
  align-self: flex-start;
}

/* Form Validation States */
.contact__form {
  --color-error: #ef4444;
  --color-success: #22c55e;
}

.form-group__error {
  font-size: var(--text-sm);
  color: var(--color-error);
  opacity: 0;
  transform: translateX(8px);
  transition:
    opacity var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.form-group--error .form-group__input,
.form-group--error .form-group__textarea {
  border-color: var(--color-error);
  animation: shake 0.4s var(--ease-out);
}

.form-group--error .form-group__input:focus,
.form-group--error .form-group__textarea:focus {
  border-color: var(--color-error);
}

.form-group--error .form-group__error {
  opacity: 1;
  transform: translateX(0);
}

.form-group--valid .form-group__input,
.form-group--valid .form-group__textarea {
  border-color: var(--color-success);
}

.form-group--valid .form-group__input:focus,
.form-group--valid .form-group__textarea:focus {
  border-color: var(--color-success);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-4px); }
  40%, 80% { transform: translateX(4px); }
}

@media (prefers-reduced-motion: reduce) {
  .form-group--error .form-group__input,
  .form-group--error .form-group__textarea {
    animation: none;
  }
}

@media (max-width: 768px) {
  .contact__inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
}


/* --------------------------------------------------------------------------
   5.6 Footer
   -------------------------------------------------------------------------- */

.footer {
  padding: var(--space-8) 0;
  background-color: #0c0a09;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
}

.footer__copy {
  font-size: var(--text-sm);
  color: #a8a29e;
  margin: 0;
}

.footer__recaptcha {
  font-size: var(--text-sm);
  color: var(--color-text-subtle);
  margin: 0;
}

.footer__recaptcha a {
  color: var(--color-text-subtle);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer__recaptcha a:hover {
  color: var(--color-text-muted);
}

/* Hide reCAPTCHA badge */
.grecaptcha-badge {
  visibility: hidden !important;
}

@media (max-width: 640px) {
  .footer__inner {
    flex-direction: column;
    gap: var(--space-4);
  }
}


/* --------------------------------------------------------------------------
   5.7 Theme Toggle
   -------------------------------------------------------------------------- */

.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  padding: 0;
  background: white;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--color-text-muted);
  overflow: hidden;
}

/* Desktop toggle - hide on mobile */
.theme-toggle--desktop {
  display: block;
}

/* Mobile toggle - fixed bottom right */
.theme-toggle--mobile {
  display: none;
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 101;
  margin-left: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.theme-toggle:focus {
  outline: none;
}

[data-theme="dark"] .theme-toggle {
  background: #0a0908;
}

.theme-toggle__icons {
  position: absolute;
  left: 50%;
  top: 10px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  transition: top var(--duration-fast) var(--ease-out);
}

.theme-toggle__icon {
  font-size: 20px;
  line-height: 1;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hover animation - slide up to show moon */
.theme-toggle:hover .theme-toggle__icons {
  top: -30px;
}

/* Dark mode - start from moon, slide to sun on hover */
[data-theme="dark"] .theme-toggle__icons {
  top: -30px;
}

[data-theme="dark"] .theme-toggle:hover .theme-toggle__icons {
  top: 10px;
}

/* Logo theme switching */
.header__logo-light {
  display: block;
}

.header__logo-dark {
  display: none;
}

[data-theme="dark"] .header__logo-light {
  display: none;
}

[data-theme="dark"] .header__logo-dark {
  display: block;
}

/* Hero canvas dark mode */
[data-theme="dark"] .hero__canvas {
  opacity: 0.2;
  filter: invert(1);
}

/* Service card dark mode shadow */
[data-theme="dark"] .service-card:hover {
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
  .theme-toggle--desktop {
    display: none;
  }

  .theme-toggle--mobile {
    display: block;
  }
}


/* ==========================================================================
   6. Utilities
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.text-muted {
  color: var(--color-text-muted);
}

/* Skip link - accessible navigation */
.skip-link {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -100%);
  background: var(--color-accent);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: transform var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  transform: translate(-50%, 25%);
  outline: 2px solid var(--color-highlight);
  outline-offset: 2px;
}


/* ==========================================================================
   7. Animations
   ========================================================================== */

/* Reveal animation for elements entering viewport */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for children */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

[data-reveal-stagger].is-revealed > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-stagger].is-revealed > *:nth-child(2) { transition-delay: 100ms; }
[data-reveal-stagger].is-revealed > *:nth-child(3) { transition-delay: 200ms; }
[data-reveal-stagger].is-revealed > *:nth-child(4) { transition-delay: 300ms; }
[data-reveal-stagger].is-revealed > *:nth-child(5) { transition-delay: 400ms; }
[data-reveal-stagger].is-revealed > *:nth-child(6) { transition-delay: 500ms; }

[data-reveal-stagger].is-revealed > * {
  opacity: 1;
  transform: translateY(0);
}

/* Hero text reveal animation */
.hero__title-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(100%);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}

.hero--loaded .hero__title-word {
  opacity: 1;
  transform: translateY(0);
}

.hero--loaded .hero__title-word:nth-child(1) { transition-delay: 200ms; }
.hero--loaded .hero__title-word:nth-child(2) { transition-delay: 300ms; }
.hero--loaded .hero__title-word:nth-child(3) { transition-delay: 400ms; }
.hero--loaded .hero__title-word:nth-child(4) { transition-delay: 500ms; }
.hero--loaded .hero__title-word:nth-child(5) { transition-delay: 600ms; }

/* Magnetic button effect - transform handled via JS for .button elements */


/* ==========================================================================
   8. Media Queries - Fine-tuning
   ========================================================================== */

/* Large screens */
@media (min-width: 1400px) {
  :root {
    --container-max: 1320px;
  }
}

/* Medium screens */
@media (max-width: 1024px) {
  .section {
    padding-block: var(--space-20);
  }

  .section--large {
    padding-block: var(--space-24);
  }
}

/* Small screens */
@media (max-width: 768px) {
  html {
    font-size: 100%; /* 16px base */
  }

  .section {
    padding-block: var(--space-16);
  }

  .hero {
    min-height: auto;
    padding-top: var(--space-32);
    padding-bottom: var(--space-20);
  }

  .hero__scroll {
    display: none;
  }
}

/* Extra small screens */
@media (max-width: 480px) {
  .hero__cta {
    width: 100%;
    justify-content: center;
  }
}