/* --- VARIABLES --- */
:root {
  --bg-color: #1a1b26;
  --header-bg: #16161e;
  --header-text: #c0caf5;
  --card-bg: #24283b;
  --card-border: #414868;
  --text-primary: #c0caf5;
  --text-secondary: #a9b1d6;
  --btn-primary: #7aa2f7;
  --accent-magenta: #bb9af7;
  --accent-cyan: #7dcfff;
  --accent-green: #9ece6a;
  --input-bg: #24283b;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  margin: 0;
  display: flex;
  justify-content: center;
  height: 100vh;
  height: 100dvh;
  overflow: hidden; /* Prevent body scrolling */
  color: var(--text-primary);
}

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

/* --- LOGIN VIEW --- */
.center-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background-color: #1a1b26;
}

.login-card {
  background: #24283b;
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  text-align: center;
  width: 300px;
  border: 1px solid #414868;
}

.primary-btn {
  background-color: var(--btn-primary);
  color: #1a1b26;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  margin-top: 20px;
  width: 100%;
  font-weight: 600;
}

.primary-btn:hover {
  filter: brightness(1.1);
}

/* --- APP CONTAINER --- */
.app-container {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background-color: var(--bg-color);
  display: flex;
  flex-direction: column;
  box-shadow: none;
  overflow: hidden;
}

/* --- HEADER --- */
header {
  background-color: var(--header-bg);
  color: var(--header-text);
  padding: 10px 20px;
  padding-top: calc(10px + env(safe-area-inset-top));
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  z-index: 10;
  flex-shrink: 0;
  border-bottom: 1px solid var(--card-border);
}

.header-left {
  display: flex;
  align-items: center;
}

header h1 {
  font-size: 1.2rem;
  margin: 0;
  font-weight: 500;
  color: var(--accent-magenta);
}

.avatar {
  width: 32px;
  height: 32px;
  background: var(--card-border);
  border-radius: 50%;
  margin-right: 12px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  overflow: hidden;
}

.logout-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.logout-btn:hover {
  background: var(--card-border);
  color: var(--header-text);
}

/* --- UPLOADS LIST --- */
#uploads-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background-color: var(--bg-color);
  column-width: 320px;
  column-gap: 16px;
  width: 100%;
  max-width: 2400px;
  margin: 0 auto;
}

.upload-card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  padding: 15px;
  margin-bottom: 16px;
  display: inline-block;
  width: 100%;
  border: 1px solid var(--card-border);
  box-sizing: border-box;
  height: fit-content;
  transition: transform 0.2s, border-color 0.2s;
  break-inside: avoid;
  cursor: pointer;
}

.upload-card:hover {
  border-color: var(--btn-primary);
  transform: translateY(-2px);
}

/* --- CONTENT TYPES --- */
.content-image img {
  max-width: 100%;
  max-height: 350px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  margin: 0 auto 10px auto;
  border: 1px solid var(--card-border);
}

.content-file {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #1f2335;
  padding: 12px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid var(--card-border);
  transition: all 0.2s;
}

.content-file:hover {
  background: #292e42;
  border-color: var(--accent-cyan);
}

.file-icon {
  font-size: 1.5rem;
  color: var(--accent-magenta);
}

.file-details {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.file-name {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--accent-cyan);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-size {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.content-text {
  white-space: pre-wrap;
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.5;
  word-break: break-word;
}

.meta-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  border-top: 1px solid var(--card-border);
  padding-top: 8px;
}

.card-actions {
  display: flex;
  gap: 8px;
  opacity: 0;
  transition: opacity 0.2s;
}

.upload-card:hover .card-actions {
  opacity: 1;
}

.action-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.action-btn svg {
  width: 16px;
  height: 16px;
}

.action-btn:hover {
  background: var(--card-border);
  color: var(--accent-cyan);
}

.action-btn.delete-btn:hover {
  color: #f7768e; /* Tokyonight Red */
}

.meta-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* --- FOOTER --- */
.input-area {
  background-color: var(--header-bg);
  padding: 15px 20px;
  padding-bottom: calc(15px + env(safe-area-inset-bottom));
  display: flex;
  gap: 15px;
  align-items: center;
  border-top: 1px solid var(--card-border);
  flex-shrink: 0;
  justify-content: center;
}

.input-area-content {
  display: flex;
  gap: 15px;
  align-items: center;
  width: 100%;
  max-width: 800px;
}

.input-area textarea {
  flex: 1;
  min-width: 0;
  padding: 12px 20px;
  border-radius: 20px;
  border: 1px solid var(--card-border);
  outline: none;
  font-size: 16px;
  background-color: var(--input-bg);
  color: var(--text-primary);
  transition: all 0.2s;
  resize: none;
  font-family: inherit;
  line-height: 1.4;
  max-height: 150px;
  overflow-y: auto;
}

.input-area textarea:focus {
  border-color: var(--btn-primary);
  background-color: #292e42;
}

.input-area textarea::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.send-btn {
  background-color: var(--btn-primary);
  color: #1a1b26;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}

.send-btn svg {
  width: 20px;
  height: 20px;
  margin-left: -2px; /* Visual center adjustment */
}

.send-btn:hover {
  filter: brightness(1.1);
}

.attach-btn {
  background: transparent;
  color: var(--accent-magenta);
  border: none;
  cursor: pointer;
  padding: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.1s;
  flex-shrink: 0;
}

.attach-btn svg {
  width: 24px;
  height: 24px;
}

.attach-btn:hover {
  filter: brightness(1.2);
  transform: scale(1.1);
}

/* --- MODAL --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal-content {
  width: 90%;
  max-width: 900px;
  max-height: 90vh;
  overflow-y: auto;
  animation: zoomIn 0.2s ease-out;
}

.modal-content .upload-card {
  cursor: default;
  width: 100%;
  max-width: none;
  margin-bottom: 0;
  transform: none !important;
  border-color: var(--card-border);
}

.modal-content .content-image img {
  max-height: 70vh;
}

.modal-content .content-text {
  font-size: 1.1rem;
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* --- MOBILE RESPONSIVE --- */
@media (max-width: 600px) {
  .login-card {
    width: 90%;
    max-width: 320px;
    padding: 30px 20px;
  }

  .input-area {
    padding: 10px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom));
    gap: 10px;
  }

  .input-area-content {
    gap: 10px;
  }

  .input-area textarea {
    padding: 10px 15px;
  }

  #uploads-container {
    padding: 12px;
  }

  header {
    padding: 8px 15px;
    padding-top: calc(8px + env(safe-area-inset-top));
  }

  header h1 {
    font-size: 1.1rem;
  }
}