:root {
  --bg: #eef2f6;
  --panel: #ffffff;
  --surface: #f7f9fc;
  --line: #e3e8ef;
  --line-strong: #ccd5e1;
  --text: #172033;
  --muted: #6b7485;
  --accent: #1769e0;
  --accent-dark: #0f56bd;
  --accent-soft: rgba(23, 105, 224, 0.12);
  --self: #eef5ff;
  --admin: #fff7d6;
  --admin-line: #ead784;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Aptos", "Noto Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 0%, rgba(23, 105, 224, 0.08), transparent 32%),
    linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
}

.modal-open {
  overflow: hidden;
}

.student-body,
.admin-body {
  padding: 18px 12px;
}

.simple-shell,
.admin-shell {
  width: min(1200px, 100%);
  min-height: calc(100dvh - 36px);
  margin: 0 auto;
}

.panel {
  display: flex;
  flex-direction: column;
  padding: 14px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(204, 213, 225, 0.85);
  border-radius: 18px;
  box-shadow: 0 14px 36px rgba(34, 47, 69, 0.09);
}

.simple-shell > .panel,
.admin-shell > .panel {
  min-height: calc(100dvh - 36px);
}

.join-screen {
  width: min(540px, 100%);
  margin: clamp(18px, 7vh, 72px) auto;
  display: grid;
  gap: 12px;
}

.admin-login-screen {
  width: min(460px, 100%);
}

.brand-heart {
  display: inline-block;
  margin-left: 3px;
  color: #e5485d;
  font-size: 17px;
  animation: heart-beat 2.2s ease-in-out infinite;
}

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

.join-brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 7px 11px;
  color: #526071;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.13em;
  background: #f4f7fb;
  border: 1px solid #e3e8ef;
  border-radius: 999px;
}

.join-brand-mark span {
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.join-brand h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(31px, 7vw, 40px);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.join-brand-message {
  margin: 13px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.join-credit {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 3px;
  margin: 9px 0 0;
  color: #9aa3b1;
  font-size: 11px;
  line-height: 1.5;
}

.join-credit strong {
  color: #667184;
}

.join-divider {
  width: 52px;
  height: 3px;
  margin: 28px auto;
  background: var(--accent);
  border-radius: 999px;
}

.join-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 42px 46px 38px;
  text-align: center;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(204, 213, 225, 0.8);
  border-radius: 26px;
  box-shadow: 0 24px 64px rgba(24, 39, 63, 0.16);
  animation: join-screen-in 520ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.join-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.join-card h2 {
  margin: 0;
  font-size: 30px;
  letter-spacing: -0.04em;
}

.join-description {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.admin-shell {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: calc(100dvh - 36px);
}

.admin-shell > .panel {
  min-height: 0;
}

.admin-project-panel {
  flex: 0 0 auto;
  padding-bottom: 12px;
}

.admin-chat-panel {
  flex: 1;
}

.admin-project-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.admin-project-refresh {
  min-width: 88px;
}

.admin-project-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px;
}

.admin-project-list.is-loading {
  opacity: 0.72;
}

.admin-project-card {
  display: grid;
  gap: 6px;
  padding: 12px 13px;
  color: inherit;
  text-decoration: none;
  background: #f8fafc;
  border: 1px solid #dce4ee;
  border-radius: 14px;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease;
}

.admin-project-card:hover {
  transform: translateY(-1px);
  background: #ffffff;
  border-color: #c9d8ec;
  box-shadow: 0 10px 24px rgba(31, 43, 61, 0.08);
}

.admin-project-name {
  font-size: 14px;
  line-height: 1.35;
}

.admin-project-meta {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.admin-project-open {
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.admin-project-empty {
  margin: 0;
  padding: 18px 14px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  background: #f8fafc;
  border: 1px dashed #d7dee8;
  border-radius: 14px;
}

h2 {
  margin: 0 0 4px;
  font-size: 16px;
  letter-spacing: -0.015em;
}

.muted {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.join-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
  margin-top: 27px;
}

.join-field {
  display: grid;
  gap: 7px;
  text-align: left;
}

.join-field > span {
  color: #3d4858;
  font-size: 12px;
  font-weight: 700;
}

.join-field input {
  min-height: 50px;
  padding: 12px 14px;
  background: #f8fafc;
  border-color: #dbe2eb;
}

.join-field input::placeholder {
  color: #9aa3b1;
}

.join-button {
  width: 100%;
  min-height: 50px;
  margin-top: 2px;
}

.join-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.join-note {
  margin: 15px 0 0;
  color: #99a2b0;
  font-size: 11px;
  text-align: center;
}

.login-error {
  margin: -2px 0 0;
  color: #c23d51;
  font-size: 12px;
  text-align: left;
}

.join-footer-credit {
  margin: 0;
  color: #8d97a7;
  font-size: 12px;
  text-align: center;
  letter-spacing: 0.02em;
}

input,
textarea,
button {
  font: inherit;
}

input {
  width: 100%;
  min-height: 44px;
  padding: 10px 13px;
  color: var(--text);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  border-radius: 10px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease,
    transform 120ms ease;
}

.primary-button {
  padding: 10px 16px;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: 0 5px 12px rgba(23, 105, 224, 0.22);
}

.primary-button:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  box-shadow: 0 7px 16px rgba(23, 105, 224, 0.28);
}

.primary-button:active,
.secondary-button:active {
  transform: translateY(1px);
}

.message-list {
  flex: 1;
  min-height: 0;
  margin: 0;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  scrollbar-color: #c9d1dc transparent;
  scrollbar-width: thin;
}

.submission-notice {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
  padding: 13px 14px;
  border-radius: 14px;
}

.submission-notice.is-submitted {
  background: #eef6ff;
  border: 1px solid #d6e4fb;
}

.submission-notice.is-pending {
  background: #fff1f3;
  border: 1px solid #f3cdd5;
}

.submission-notice-text,
.submission-notice-meta,
.submission-notice-hint {
  margin: 0;
}

.submission-notice-text {
  color: #213148;
  font-size: 13px;
  font-weight: 800;
}

.submission-notice-meta {
  color: #5e6c7e;
  font-size: 12px;
  line-height: 1.45;
}

.submission-notice-hint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  color: #36506f;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
}

.submission-notice-pill {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 800;
  border-radius: 999px;
}

.submission-notice.is-submitted .submission-notice-text {
  color: #213148;
}

.submission-notice.is-submitted .submission-notice-meta {
  color: #5e6c7e;
}

.submission-notice.is-submitted .submission-notice-hint {
  color: #36506f;
}

.submission-notice.is-submitted .submission-notice-pill {
  color: #0f56bd;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid #cfe0fb;
}

.submission-notice.is-pending .submission-notice-text {
  color: #8b2636;
}

.submission-notice.is-pending .submission-notice-meta {
  color: #975563;
}

.submission-notice.is-pending .submission-notice-hint {
  color: #8a4652;
}

.submission-notice.is-pending .submission-notice-pill {
  color: #b03d4f;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid #efc6cf;
}

.submission-notice-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.submission-notice-link {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  text-decoration: none;
}

.submission-notice-link:hover {
  text-decoration: underline;
}

.submission-notice-path {
  padding: 4px 8px;
  color: #38506d;
  font-size: 11px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid #d8e4f5;
  border-radius: 999px;
  overflow-wrap: anywhere;
}

.chat-stage {
  display: flex;
  flex: 1;
  min-height: 0;
  position: relative;
  margin: 0 0 12px;
}

.message-item {
  padding: 8px 12px;
  font-size: 14px;
  line-height: 1.45;
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid #e9edf2;
}

.message-item:last-child {
  border-bottom: 0;
}

.message-item.self {
  background: var(--self);
}

.message-item.admin {
  margin: 5px 7px;
  background: var(--admin);
  border: 1px solid var(--admin-line);
  border-radius: 9px;
}

.message-item.system {
  color: #586579;
  background: #f1f5fa;
}

.message-item.system .message-meta {
  color: #7b8798;
}

.message-item.system .message-text {
  font-size: 13px;
  font-weight: 600;
}

.message-meta {
  display: block;
  margin-bottom: 2px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.45;
}

.message-text {
  display: block;
  margin: 0;
  overflow-wrap: anywhere;
  font: inherit;
  line-height: 1.5;
  white-space: pre-wrap;
}

.message-code {
  margin-top: 8px;
  overflow: hidden;
  background: #0f1728;
  border: 1px solid #1f2b42;
  border-radius: 12px;
}

.message-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.message-code-language {
  color: #a8b5cb;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.message-code-copy {
  min-width: 58px;
  padding: 6px 10px;
  color: #d9e6ff;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.message-code-copy:hover {
  background: rgba(255, 255, 255, 0.12);
}

.message-code-copy.is-copied {
  color: #bff4cd;
  border-color: rgba(126, 224, 157, 0.38);
}

.message-code-copy.is-failed {
  color: #ffd1d8;
  border-color: rgba(240, 104, 130, 0.34);
}

.message-code-content {
  margin: 0;
  padding: 12px;
  overflow-x: auto;
  color: #eef4ff;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre;
  scrollbar-color: rgba(189, 202, 223, 0.4) transparent;
  scrollbar-width: thin;
}

.message-code-content code {
  display: block;
  font-family: "Cascadia Code", "Consolas", "Courier New", monospace;
}

.message-code-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px 12px;
  background: rgba(255, 255, 255, 0.03);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.message-code-ellipsis {
  color: #7e8ca6;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.message-code-toggle {
  padding: 6px 10px;
  color: #8ec5ff;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
  border: 1px solid rgba(142, 197, 255, 0.24);
  border-radius: 8px;
}

.message-code-toggle:hover {
  background: rgba(142, 197, 255, 0.1);
}

.token-comment {
  color: #6f7f98;
}

.token-keyword {
  color: #7cc5ff;
}

.token-string {
  color: #f7c26d;
}

.token-number {
  color: #b8f18a;
}

.token-literal {
  color: #ff95b3;
}

.token-function {
  color: #82e4d2;
}

.token-tag {
  color: #8db9ff;
}

.token-attr {
  color: #caa8ff;
}

.token-selector {
  color: #9ad6ff;
}

.token-property {
  color: #ffb0a4;
}

.message-image-block {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  width: fit-content;
  max-width: min(100%, 460px);
  margin-top: 8px;
}

.message-image {
  display: block;
  width: auto;
  max-width: min(100%, 460px);
  max-height: 420px;
  margin: 0;
  border: 1px solid #d9e0ea;
  border-radius: 12px;
  object-fit: contain;
  background: #fff;
  cursor: zoom-in;
}

.message-form {
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(34, 47, 69, 0.07);
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.message-form:focus-within {
  border-color: var(--accent);
  box-shadow:
    0 0 0 4px var(--accent-soft),
    0 9px 24px rgba(34, 47, 69, 0.1);
}

.message-form textarea {
  display: block;
  width: 100%;
  min-height: 94px;
  max-height: 300px;
  padding: 15px 16px 10px;
  overflow-y: auto;
  color: var(--text);
  line-height: 1.55;
  resize: vertical;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.message-form textarea::placeholder {
  color: #949dab;
}

.message-form textarea:focus {
  outline: none;
}

.image-preview {
  padding: 12px 14px 0;
}

.image-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
  color: #687385;
  font-size: 12px;
  font-weight: 700;
}

.image-preview-remove {
  padding: 0;
  color: #7c8797;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
  border: 0;
}

.image-preview-remove:hover {
  color: #d64f61;
}

.image-preview-media {
  display: block;
  width: auto;
  max-width: min(100%, 320px);
  max-height: 220px;
  border: 1px solid #d9e0ea;
  border-radius: 12px;
  object-fit: contain;
  background: #fff;
  cursor: zoom-in;
}

.message-image-note {
  margin: 0;
  color: #8b94a3;
  font-size: 12px;
  line-height: 1.45;
  text-align: center;
}

.image-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(11, 17, 29, 0.84);
  backdrop-filter: blur(3px);
}

.image-modal-media {
  display: block;
  max-width: min(100%, 1200px);
  max-height: calc(100dvh - 80px);
  border-radius: 16px;
  object-fit: contain;
  background: #fff;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.32);
}

.image-modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: #fff;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
}

.image-modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.image-modal-close svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.4;
}

.composer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 54px;
  padding: 8px 9px 9px 15px;
  background: #fbfcfe;
  border-top: 1px solid #edf0f4;
}

.character-count {
  color: #8a94a3;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.form-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.secondary-button {
  min-width: 74px;
  padding: 9px 11px;
  color: #4d596b;
  background: transparent;
  border: 1px solid transparent;
  box-shadow: none;
}

.secondary-button:hover {
  color: var(--accent);
  background: #eef4fd;
  border-color: #d9e6fa;
}

.secondary-button svg,
.send-button svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.reaction-emoji {
  font-size: 16px;
  font-weight: 400;
  line-height: 1;
}

.ok-button:hover {
  color: #b46a0b;
  background: #fff8e8;
  border-color: #f2dfb5;
}

.heart-button:hover {
  color: #dc3f62;
  background: #fff0f3;
  border-color: #f8d4dd;
}

.send-button {
  min-width: 78px;
  padding: 10px 14px;
  border-radius: 10px;
}

.send-button svg {
  width: 17px;
  height: 17px;
}

.project-button {
  min-width: 92px;
}

.project-button svg {
  fill: none;
  stroke: currentColor;
}

.submit-modal {
  position: fixed;
  inset: 0;
  z-index: 55;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  background: rgba(12, 18, 31, 0.5);
  backdrop-filter: blur(6px);
}

.submit-modal-dialog {
  width: min(760px, 100%);
  max-height: min(88dvh, 820px);
  padding: 22px;
  overflow-y: auto;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid rgba(204, 213, 225, 0.9);
  border-radius: 20px;
  box-shadow: 0 26px 80px rgba(23, 33, 53, 0.18);
}

.submit-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.submit-modal-header h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.submit-modal-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  color: #748196;
  cursor: pointer;
  background: #f5f7fb;
  border: 1px solid #dde5f0;
  border-radius: 999px;
}

.submit-modal-close:hover {
  color: var(--accent);
  background: #eef4fd;
}

.submit-modal-close svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

.submit-modal-description {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.submit-modal-toolbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(140px, 160px));
  justify-content: start;
  gap: 10px;
  margin-top: 18px;
}

.modal-action-button {
  width: 100%;
  min-height: 46px;
  padding: 0 16px;
  border-radius: 12px;
}

.submit-modal-toolbar .secondary-button {
  color: #173b74;
  background: #eef4ff;
  border: 1px solid #cfe0ff;
  box-shadow: 0 8px 18px rgba(23, 105, 224, 0.08);
}

.submit-modal-toolbar .secondary-button:hover {
  color: #0f56bd;
  background: #e4efff;
  border-color: #bdd5ff;
}

.submit-modal-toolbar .primary-button {
  background: #1769e0;
  border-color: #1769e0;
  box-shadow: 0 10px 22px rgba(23, 105, 224, 0.24);
}

.submit-modal-toolbar .primary-button:hover {
  background: #0f56bd;
  border-color: #0f56bd;
}

.submit-modal-toolbar .primary-button:disabled,
.submit-modal-toolbar .secondary-button:disabled {
  color: #8e99aa;
  cursor: not-allowed;
  background: #eef2f6;
  border-color: #d7dee8;
  box-shadow: none;
  transform: none;
}

.submit-modal-limits {
  margin: 12px 0 0;
  color: #7d8899;
  font-size: 12px;
}

.submission-summary-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
}

.submission-summary {
  margin: 0;
  color: #4b576a;
  font-size: 13px;
  font-weight: 700;
}

.submission-clear {
  padding: 0;
  color: #8792a3;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
  border: 0;
}

.submission-clear:hover {
  color: #d44d64;
}

.submission-progress {
  margin-top: 16px;
  padding: 14px;
  background: #f8fbff;
  border: 1px solid #e1ebfb;
  border-radius: 14px;
}

.submission-progress-track {
  width: 100%;
  height: 10px;
  overflow: hidden;
  background: #e8eef8;
  border-radius: 999px;
}

.submission-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #1769e0 0%, #4f8ff0 100%);
  border-radius: inherit;
  transition: width 160ms ease;
}

.submission-progress-text {
  margin: 10px 0 0;
  color: #556173;
  font-size: 12px;
  font-weight: 700;
}

.submission-file-list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.submission-file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
  background: #f9fbfd;
  border: 1px solid #e4eaf1;
  border-radius: 14px;
}

.submission-file-info {
  min-width: 0;
}

.submission-file-name {
  display: block;
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 14px;
}

.submission-file-meta {
  margin: 4px 0 0;
  color: #7d8899;
  font-size: 12px;
}

.submission-file-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.submission-file-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 86px;
  min-height: 30px;
  padding: 0 10px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.02em;
  border-radius: 999px;
}

.submission-file-badge.is-neutral {
  color: #566274;
  background: #eef2f7;
}

.submission-file-badge.is-loading {
  color: #0f56bd;
  background: #eaf2ff;
}

.submission-file-badge.is-ready {
  color: #0b6b58;
  background: #e6f6f0;
}

.submission-file-badge.is-success {
  color: #0a6d45;
  background: #dff7eb;
}

.submission-file-remove {
  padding: 0;
  color: #8b96a7;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  background: transparent;
  border: 0;
}

.submission-file-remove:hover {
  color: #d44d64;
}

.submission-status {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding: 15px 16px;
  border-radius: 14px;
}

.submission-status.is-loading {
  background: #eef4fd;
  border: 1px solid #d8e5fb;
}

.submission-status.is-success {
  background: #ecfaf2;
  border: 1px solid #d2eedf;
}

.submission-status.is-error {
  background: #fff2f4;
  border: 1px solid #f3d7de;
}

.submission-status-text {
  margin: 0;
  color: #334055;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
}

.submission-status-link {
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.submission-status-link:hover {
  text-decoration: underline;
}

.reaction-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.floating-like {
  position: absolute;
  bottom: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  line-height: 1;
  user-select: none;
  opacity: 0;
  transform: translateX(-50%);
  animation: float-like var(--duration, 2600ms) ease-out forwards;
}

.floating-like-icon {
  display: block;
  filter: drop-shadow(0 3px 5px rgba(34, 47, 69, 0.15));
}

.floating-like-label {
  display: block;
  color: rgba(23, 32, 51, 0.5);
  font-size: 11px;
  white-space: nowrap;
}

@keyframes float-like {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(0) scale(0.85);
  }

  10%,
  68% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translateX(calc(-50% + var(--drift, 0px))) translateY(-290px)
      scale(1.1);
  }
}

@keyframes join-screen-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.99);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes heart-beat {
  0%,
  100% {
    transform: scale(1);
  }

  15% {
    transform: scale(1.16);
  }

  28% {
    transform: scale(1);
  }
}

.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;
}

.hidden {
  display: none !important;
}

@media (max-width: 760px) {
  .student-body,
  .admin-body {
    padding: 10px 8px;
  }

  .simple-shell,
  .admin-shell {
    min-height: calc(100dvh - 20px);
  }

  .admin-shell {
    height: calc(100dvh - 20px);
  }

  .join-form {
    display: grid;
    grid-template-columns: 1fr;
  }

  .join-screen {
    margin: 0 auto;
  }

  .join-card {
    padding: 32px 25px 28px;
    border-radius: 20px;
  }

  .join-divider {
    margin: 24px auto;
  }

  .panel {
    padding: 11px;
    border-radius: 15px;
  }

  .simple-shell > .panel,
  .admin-shell > .panel {
    min-height: calc(100dvh - 20px);
  }

  .admin-shell > .panel {
    min-height: 0;
  }

  .admin-project-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .admin-project-list {
    grid-template-columns: 1fr;
  }

  .message-form textarea {
    min-height: 86px;
    padding: 13px 13px 8px;
  }

  .image-preview {
    padding: 10px 12px 0;
  }

  .message-image {
    max-width: 100%;
    max-height: 320px;
  }

  .message-code-header {
    padding: 9px 10px;
  }

  .message-code-content {
    padding: 10px;
    font-size: 12px;
  }

  .message-code-footer {
    padding: 9px 10px 10px;
  }

  .message-code-toggle {
    padding: 5px 8px;
    font-size: 11px;
  }

  .image-modal {
    padding: 14px;
  }

  .image-modal-media {
    max-height: calc(100dvh - 60px);
    border-radius: 12px;
  }

  .composer-footer {
    min-height: 50px;
    padding: 6px 7px 7px 12px;
  }

  .send-button {
    min-width: 70px;
    padding: 9px 11px;
  }

  .submit-modal {
    padding: 10px;
  }

  .submit-modal-dialog {
    padding: 18px 16px;
    border-radius: 16px;
  }

  .submit-modal-toolbar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .submission-summary-row,
  .submission-file-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .submission-file-actions {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 460px) {
  .submit-modal-toolbar {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .join-card,
  .brand-heart {
    animation: none;
  }
}

@media (max-width: 360px) {
  .character-count {
    display: none;
  }

  .composer-footer {
    justify-content: flex-end;
  }
}