/* ===================================================================
   Timo Heimbach – Photography Portfolio
   =================================================================== */

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

:root {
  --white: #f7f7f7;
  --offwhite: #fafafa;
  --black: #1a1a1a;
  --gray: #888888;
  --gray-light: #c0c0c0;
  --accent: #ff9f50;
  --font-logo: 'Barlow Condensed', 'Arial Narrow', Helvetica, sans-serif;
  --font-body: 'Inter', Helvetica, Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* --- Cursor glow --------------------------------------------------- */
#cursor-glow {
  position: fixed;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.45;
  filter: blur(40px);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  will-change: left, top;
  display: none; /* shown via JS on desktop */
}

/* --- Header -------------------------------------------------------- */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 2.5rem;
  background: var(--white);
}

#logo {
  font-family: var(--font-logo);
  font-style: normal;
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--black);
}

/* --- Category nav -------------------------------------------------- */
#category-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.cat-btn {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--gray-light);
  letter-spacing: 0.03em;
  text-transform: lowercase;
  padding: 0.2rem 0;
  border-bottom: 1.5px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.cat-btn:hover {
  color: var(--gray);
}

.cat-btn.active {
  color: var(--black);
  border-bottom-color: var(--black);
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav a,
nav button.nav-link {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--gray);
  transition: color 0.2s ease;
  letter-spacing: 0.02em;
}

#nav-about {
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  text-transform: lowercase;
}

nav a:hover,
nav button.nav-link:hover {
  color: var(--black);
}

nav svg {
  vertical-align: middle;
  transition: color 0.2s ease;
}

#btn-logout {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--gray);
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

#btn-logout:hover {
  color: var(--black);
}

/* --- Main ---------------------------------------------------------- */
main {
  padding: 6rem 4rem 3rem;
  max-width: 1600px;
  margin: 0 auto;
  position: relative;
}

/* Bottom fade-out effect */
body::after {
  content: '';
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent 0%, rgba(247,247,247,0.05) 30%, rgba(247,247,247,0.3) 60%, rgba(247,247,247,0.7) 80%, var(--white) 100%);
  pointer-events: none;
  z-index: 50;
}

/* --- Photo grid ---------------------------------------------------- */
.masonry {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.grid-item {
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  /* Scroll animation initial state */
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.grid-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.grid-item img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.grid-item:hover img {
  transform: scale(1.06);
}

/* Admin add tile */
.grid-item.add-tile {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--offwhite);
  border: 2px dashed var(--gray-light);
  min-height: 220px;
  transition: border-color 0.3s ease, opacity 0.6s ease, transform 0.6s ease;
  opacity: 0;
  transform: translateY(20px);
}

.grid-item.add-tile.visible {
  opacity: 1;
  transform: translateY(0);
}

.grid-item.add-tile:hover {
  border-color: var(--accent);
}

.add-tile-plus {
  font-size: 3rem;
  font-weight: 200;
  color: var(--gray-light);
  line-height: 1;
  transition: color 0.3s ease;
}

.grid-item.add-tile:hover .add-tile-plus {
  color: var(--accent);
}

/* Admin delete button */
.grid-item .btn-delete {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  display: none; /* shown in admin mode */
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
  z-index: 5;
  transition: background 0.2s ease;
}

.grid-item .btn-delete:hover {
  background: rgba(200, 50, 50, 0.85);
}

body.admin-mode .grid-item .btn-delete {
  display: flex;
}

/* Admin category select on grid items */
.grid-item .btn-category {
  position: absolute;
  bottom: 8px;
  left: 8px;
  font-family: var(--font-body);
  font-size: 11px;
  padding: 3px 6px;
  border-radius: 4px;
  border: none;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  display: none;
  z-index: 5;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

body.admin-mode .grid-item .btn-category {
  display: block;
}

/* Upload category select */
#upload-category {
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
  width: 100%;
  margin-bottom: 1rem;
  outline: none;
  transition: border-color 0.2s ease;
}

#upload-category:focus {
  border-color: var(--black);
}

/* Drag sorting styles */
body.admin-mode .grid-item[draggable='true'] {
  cursor: grab;
}

body.admin-mode .grid-item[draggable='true']:active {
  cursor: grabbing;
}

.grid-item.dragging {
  opacity: 0.25;
  transform: scale(0.95) !important;
}

/* Visual line showing where the image will be inserted */
.drop-indicator {
  height: 100%;
  min-height: 220px;
  border-radius: 4px;
  border: 2px dashed var(--accent);
  background: rgba(255, 159, 80, 0.08);
}

/* --- Overlays (shared) --------------------------------------------- */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 1;
  transition: opacity 0.3s ease;
}

.overlay.hidden {
  display: none;
}

.overlay-inner {
  background: var(--white);
  border-radius: 12px;
  padding: 3rem;
  max-width: 560px;
  width: 90%;
  position: relative;
}

.overlay-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  color: var(--gray);
  transition: color 0.2s ease;
}

.overlay-close:hover {
  color: var(--black);
}

/* --- About overlay ------------------------------------------------- */
#about-overlay h2 {
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 2rem;
  margin-bottom: 1rem;
}

#about-overlay p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: #444;
}

#about-overlay a {
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- Lightbox ------------------------------------------------------ */
#lightbox {
  cursor: default;
}

#lightbox #lb-img {
  max-height: 90vh;
  max-width: 80vw;
  object-fit: contain;
  border-radius: 4px;
  user-select: none;
}

.lb-btn {
  position: absolute;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
  transition: transform 0.25s ease;
}

.lb-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.55;
  filter: blur(12px);
  transition: opacity 0.25s ease, filter 0.25s ease;
  z-index: -1;
}

.lb-btn:hover::before {
  opacity: 0.8;
  filter: blur(8px);
}

.lb-btn svg {
  position: relative;
  z-index: 1;
  filter: none;
  stroke: #fff;
}

.lb-close {
  top: 2rem;
  right: 2rem;
}

.lb-prev {
  left: 2rem;
  top: 50%;
  transform: translateY(-50%);
}

.lb-next {
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
}

/* --- Login --------------------------------------------------------- */
.login-box {
  max-width: 360px;
  text-align: center;
}

.login-box h2 {
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#login-form input {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-light);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s ease;
}

#login-form input:focus {
  border-color: var(--black);
}

#login-form button {
  font-size: 0.95rem;
  font-weight: 400;
  padding: 0.75rem;
  background: var(--black);
  color: var(--white);
  border-radius: 8px;
  transition: background 0.2s ease;
}

#login-form button:hover {
  background: #333;
}

.error {
  color: #c0392b;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}

/* --- Upload modal -------------------------------------------------- */
.upload-box {
  max-width: 480px;
  text-align: center;
}

.upload-box h2 {
  font-family: var(--font-logo);
  font-weight: 700;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
}

#drop-zone {
  border: 2px dashed var(--gray-light);
  border-radius: 12px;
  padding: 3rem 2rem;
  transition: border-color 0.3s ease, background 0.3s ease;
  cursor: pointer;
}

#drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(255, 203, 164, 0.08);
}

#drop-zone p {
  font-size: 0.95rem;
  color: var(--gray);
}

#drop-zone .link {
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.progress-bar {
  height: 4px;
  background: var(--offwhite);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 1.5rem;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.3s ease;
}

.upload-status {
  font-size: 0.85rem;
  color: var(--gray);
  margin-top: 0.5rem;
}

/* --- Footer -------------------------------------------------------- */
#footer {
  text-align: center;
  padding: 2rem 1rem 1.5rem;
  font-size: 0.75rem;
  color: var(--gray);
  letter-spacing: 0.03em;
}

/* --- Utility ------------------------------------------------------- */
.hidden {
  display: none !important;
}

/* --- Responsive ---------------------------------------------------- */
@media (max-width: 1200px) {
  .masonry {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 900px) {
  .masonry {
    grid-template-columns: repeat(2, 1fr);
  }
  header {
    padding: 1rem 1.5rem;
    flex-wrap: wrap;
  }
  #category-nav {
    position: static;
    transform: none;
    order: 3;
    width: 100%;
    justify-content: center;
    margin-top: 0.4rem;
    gap: 0.8rem;
  }
  main {
    padding: 6.5rem 1.5rem 2rem;
  }
}

@media (max-width: 600px) {
  .masonry {
    grid-template-columns: repeat(2, 1fr);
  }
  header {
    padding: 0.75rem 1rem;
  }
  #logo {
    font-size: 1.25rem;
  }
  nav {
    gap: 1rem;
  }
  #category-nav {
    gap: 0.6rem;
  }
  .cat-btn {
    font-size: 0.7rem;
  }
  main {
    padding: 6rem 1rem 2rem;
  }

  /* Lightbox mobile */
  #lightbox #lb-img {
    max-width: 95vw;
    max-height: 80vh;
  }
  .lb-prev {
    left: 0.75rem;
  }
  .lb-next {
    right: 0.75rem;
  }
  .lb-close {
    top: 1rem;
    right: 1rem;
  }
  .lb-btn {
    width: 40px;
    height: 40px;
  }
}