/* ==========================================================================
   CSS SYSTEM - VUOTOPERPIENO (Minimal Single Page)
   ========================================================================== */

/* 1. Imports & Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&display=swap');

/* 2. Custom Properties */
:root {
  --font-logo: Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --transition-slow: 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-normal: 0.4s cubic-bezier(0.25, 1, 0.5, 1);
  --transition-fast: 0.2s ease;
}

/* Light theme colors (Default) */
:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --text-muted: #666666;
  --grid-color: rgba(0, 0, 0, 0.02);
  --border-color: rgba(0, 0, 0, 0.06);
  --img-filter: none;
}

/* Dark theme colors (Automatic) */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #000000;
    --text-color: #ffffff;
    --text-muted: #888888;
    --grid-color: rgba(255, 255, 255, 0.02);
    --border-color: rgba(255, 255, 255, 0.06);
    --img-filter: invert(1);
  }
}

/* 3. Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  overflow: hidden;
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

/* 4. Page Grid Background (Subtle Technical Grid) */
.page-bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
  background-image: 
    linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: center center;
}

/* 5. Main Layout Structure */
.container {
  position: relative;
  z-index: 2;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 4rem 6rem;
  max-width: 1600px;
  margin: 0 auto;
}

/* Header */
header {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  animation: fadeIn 1.2s var(--transition-slow) forwards;
}

.brand h1 {
  font-family: var(--font-logo);
  font-size: 2rem;
  font-style: italic;
  font-weight: bold;
  letter-spacing: -0.01em;
  line-height: 1.1;
  text-transform: lowercase;
}

/* Content Area - Hero Visual (Static) */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 2rem 0;
  animation: fadeIn 1.2s var(--transition-slow) forwards;
}

.image-frame {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 90%;
  max-height: 60vh;
  border: none;
  background-color: transparent;
}

.image-frame a {
  display: block;
  max-width: 100%;
  max-height: 100%;
}

.image-frame img {
  max-width: 100%;
  max-height: 60vh;
  width: auto;
  height: auto;
  object-fit: contain; /* ensures image is never cut or cropped */
  display: block;
  filter: var(--img-filter);
  transition: filter var(--transition-slow);
}

/* Footer Section */
footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  animation: fadeIn 1.2s var(--transition-slow) forwards;
}

.contacts {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-item {
  font-size: 0.85rem;
  font-weight: 300;
  line-height: 1.5;
}

.contact-item.email {
  font-family: var(--font-logo);
  font-size: 1.05rem;
  font-style: italic;
}

.contact-item.email a {
  position: relative;
  display: inline-block;
}

/* Underline animation for the email */
.contact-item.email a::after {
  content: '';
  position: absolute;
  width: 100%;
  transform: scaleX(0);
  height: 1px;
  bottom: 0;
  left: 0;
  background-color: var(--text-color);
  transform-origin: bottom right;
  transition: transform var(--transition-normal), background-color var(--transition-slow);
}

.contact-item.email a:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.contact-item.address a {
  color: var(--text-muted);
}

.contact-item.address a:hover {
  color: var(--text-color);
}

.meta-info {
  text-align: right;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  line-height: 1.5;
}

/* 6. Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 7. Responsive Styles */
@media (max-width: 1024px) {
  .container {
    padding: 3rem 4rem;
  }
}

@media (max-width: 768px) {
  html, body {
    overflow-y: auto; /* allow scroll on small devices if content overflows */
  }

  .container {
    padding: 2rem 2rem;
    height: auto;
    min-height: 100vh;
    justify-content: flex-start;
    gap: 3.5rem;
  }
  
  header {
    margin-bottom: 0;
  }
  
  main {
    margin: 1rem 0;
  }
  
  .image-frame img {
    max-height: 50vh;
  }
  
  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 2rem;
    margin-top: auto;
  }
  
  .meta-info {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .brand h1 {
    font-size: 1.7rem;
  }
  
  .container {
    padding: 1.5rem 1.5rem;
    gap: 2.5rem;
  }
  
  .image-frame img {
    max-height: 45vh;
  }
}

/* ==========================================================================
   8. Premium Micro-interactions (Grain, Custom Cursor, Staggered Logo)
   ========================================================================== */

/* Film Grain overlay (Tactile Paper Noise) */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.035; /* ultra-subtle tactility */
  transition: opacity var(--transition-slow);
}

@media (prefers-color-scheme: dark) {
  body::after {
    opacity: 0.055; /* slightly enhanced for black backgrounds */
    filter: invert(1);
  }
}

/* Preloader / Splash Screen (V Favicon Logo Centered) */
#loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--bg-color);
  z-index: 10005;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1);
  pointer-events: all;
}

.loader-logo {
  width: 80px;
  height: auto;
  opacity: 0;
  transform: scale(0.95);
  animation: loaderLogoFadeIn 1.2s cubic-bezier(0.215, 0.61, 0.355, 1) forwards;
}

.loader-logo svg {
  width: 100%;
  height: 100%;
}

.loader-logo path {
  fill: var(--text-color);
  transition: fill var(--transition-slow);
}

@keyframes loaderLogoFadeIn {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

#loader.fade-out {
  opacity: 0;
  pointer-events: none;
}

/* Container loading state transition */
.container {
  opacity: 0;
  transition: opacity 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

.container.loaded {
  opacity: 1;
}

/* Custom Cursor with smooth lag/magnet effect */
#custom-cursor {
  display: none;
}

@media (hover: hover) and (pointer: fine) {
  /* Hide native cursor globally on devices that support hover */
  html, body, a, button, [role="button"], .image-frame img {
    cursor: none !important;
  }

  #custom-cursor {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 8px;
    height: 8px;
    background-color: var(--text-color);
    border-radius: 50%;
    z-index: 10000;
    pointer-events: none;
    transform: translate(-50%, -50%);
    opacity: 0; /* JS triggers fade-in on first mousemove */
    transition: 
      width var(--transition-normal), 
      height var(--transition-normal), 
      background-color var(--transition-slow), 
      border-color var(--transition-slow),
      opacity var(--transition-normal);
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  #custom-cursor span {
    font-family: var(--font-sans);
    font-size: 0.55rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--bg-color);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
    white-space: nowrap;
    margin-left: 0.15em;
  }

  /* Link Hover: Expands and transforms into a clear circle outline */
  #custom-cursor.hover-link {
    width: 32px;
    height: 32px;
    background-color: transparent;
    border: 1px solid var(--text-color);
  }

  /* Image Hover (Instagram): Expands into a badge with "ig →" inside */
  #custom-cursor.hover-image {
    width: 60px;
    height: 60px;
    background-color: var(--text-color);
    border: none;
  }

  #custom-cursor.hover-image span {
    opacity: 1;
    color: var(--bg-color);
  }
}