@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=Source+Serif+4:ital,wght@0,300;0,400;1,300&display=swap');

:root {
  --bg:         #0d0f14;
  --surface:    #161921;
  --surface2:   #1e222d;
  --border:     #2a2f3d;
  --accent:     #e8c547;
  --accent-dk:  #b89830;
  --blue:       #5b9cf6;
  --blue-dk:    #3a7de0;
  --green:      #47e89a;
  --text:       #e8eaf0;
  --muted:      #7a8099;
  --error:      #e85d47;
  --error-bg:   #2a1410;
  --success-bg: #0f2a1e;
  --radius:     12px;
  --radius-sm:  6px;
  --font-ui:    'Syne', sans-serif;
  --font-body:  'Source Serif 4', Georgia, serif;
}

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

.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;
}

.skip-link {
  position: absolute; top: -100px; left: 1rem;
  background: var(--accent); color: #000;
  padding: .5rem 1.2rem; border-radius: var(--radius-sm);
  font-family: var(--font-ui); font-weight: 700;
  text-decoration: none; z-index: 9999; transition: top .2s;
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.hidden { display: none !important; }

body {
  font-family: var(--font-body);
  background: var(--bg); color: var(--text);
  min-height: 100vh; line-height: 1.65;
}

/* HEADER */
header {
  background: var(--surface);
  border-bottom: 2px solid var(--accent);
  padding: 1.1rem 1.5rem;
}
.header-inner {
  max-width: 860px; margin: 0 auto;
  display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap;
}
.logo { display: flex; flex-direction: column; line-height: 1.1; }
.logo-main { font-family: var(--font-ui); font-weight: 800; font-size: 1.45rem; color: var(--accent); letter-spacing: -.02em; }
.logo-sub  { font-family: var(--font-ui); font-size: .75rem; color: var(--muted); letter-spacing: .07em; text-transform: uppercase; }
.header-tagline { color: var(--muted); font-size: .88rem; font-style: italic; border-left: 2px solid var(--border); padding-left: 1rem; }

/* MAIN */
main { padding: 1.8rem 0 4rem; }
.container { max-width: 860px; margin: 0 auto; padding: 0 1.2rem; display: flex; flex-direction: column; gap: 1.4rem; }

/* CARD */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.6rem; }
.card-title { font-family: var(--font-ui); font-weight: 700; font-size: 1.05rem; color: var(--text); margin-bottom: 1.2rem; display: flex; align-items: center; gap: .7rem; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; background: var(--accent); color: #000; border-radius: 50%; font-family: var(--font-ui); font-weight: 800; font-size: .82rem; flex-shrink: 0; }

/* ENGINE */
.engine-fieldset { border: none; padding: 0; }
.engine-options { display: flex; flex-direction: column; gap: .6rem; margin-bottom: 1rem; }
.engine-option input[type="radio"] { position: absolute; opacity: 0; width: 0; height: 0; }
.engine-option label { display: flex; align-items: center; gap: .65rem; flex-wrap: wrap; padding: .9rem 1.1rem; background: var(--surface2); border: 2px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; width: 100%; transition: border-color .2s, background .2s; }
.engine-option input:checked + label { border-color: var(--accent); background: #1c1c0e; }
.engine-option input:focus-visible + label { outline: 3px solid var(--accent); outline-offset: 2px; }
.engine-option label:hover { border-color: var(--muted); }
.engine-name { font-family: var(--font-ui); font-weight: 700; font-size: .95rem; color: var(--text); }
.engine-desc { color: var(--muted); font-size: .82rem; font-style: italic; width: 100%; }

.badge-free, .badge-recommended, .badge-premium {
  font-family: var(--font-ui); font-size: .68rem; font-weight: 700;
  padding: .15rem .45rem; border-radius: 20px;
  text-transform: uppercase; letter-spacing: .04em;
}
.badge-free        { background: #0f2a1e; color: var(--green);  border: 1px solid var(--green); }
.badge-recommended { background: #0e1e2a; color: var(--blue);   border: 1px solid var(--blue); }
.badge-premium     { background: #1a1020; color: #c084fc;       border: 1px solid #c084fc; }

/* API KEY */
.apikey-wrap { margin-top: .8rem; padding: 1rem; background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.input-row { display: flex; gap: .4rem; align-items: stretch; }
.btn-icon { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: var(--radius-sm); padding: 0 .8rem; cursor: pointer; font-size: 1rem; transition: background .2s; }
.btn-icon:hover { background: var(--border); }

/* INFO BOX */
.info-box { margin-top: .8rem; padding: .85rem 1rem; background: var(--surface2); border-left: 3px solid var(--blue); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-size: .85rem; color: var(--muted); line-height: 1.55; }
.info-box strong { color: var(--text); }

/* FIELDS */
.field-label { display: block; font-family: var(--font-ui); font-weight: 600; font-size: .82rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: .45rem; }
.req { color: var(--accent); margin-left: .15rem; }
.field-hint { color: var(--muted); font-size: .8rem; margin-top: .35rem; font-style: italic; }

.text-input, .select-input {
  width: 100%; background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-family: var(--font-body); font-size: .97rem; padding: .65rem .95rem; transition: border-color .2s; appearance: none;
}
.text-input:focus, .select-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,197,71,.14); }

/* MUSIC FILES */
.music-files-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 600px) { .music-files-grid { grid-template-columns: 1fr; } }

.music-file-block { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 1rem; display: flex; flex-direction: column; gap: .4rem; }

.file-input { width: 100%; color: var(--text); font-family: var(--font-body); font-size: .85rem; cursor: pointer; }
.file-input::file-selector-button {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-family: var(--font-ui); font-size: .82rem; font-weight: 600;
  padding: .3rem .7rem; cursor: pointer; margin-right: .5rem; transition: background .2s;
}
.file-input::file-selector-button:hover { background: var(--border); }
.file-name { font-size: .78rem; color: var(--accent); font-family: var(--font-ui); min-height: 1.2em; }

/* TABS */
.tabs { display: flex; gap: .4rem; border-bottom: 2px solid var(--border); margin-bottom: 1.4rem; }
.tab { background: transparent; border: none; border-bottom: 3px solid transparent; margin-bottom: -2px; padding: .65rem 1.2rem; font-family: var(--font-ui); font-weight: 600; font-size: .9rem; color: var(--muted); cursor: pointer; transition: color .2s, border-color .2s; }
.tab:hover { color: var(--text); }
.tab-active { color: var(--accent); border-bottom-color: var(--accent); }

/* DIALOGUE */
.dialogue-intro { color: var(--muted); font-size: .88rem; font-style: italic; margin-bottom: 1.2rem; line-height: 1.55; }
#lines-list { display: flex; flex-direction: column; gap: .7rem; margin-bottom: 1.2rem; }

/* LINE ITEM */
.line-item {
  background: var(--surface2); border: 2px solid var(--border); border-radius: var(--radius-sm);
  padding: .9rem 1rem;
  display: grid;
  grid-template-columns: 28px 1fr 32px 32px;
  grid-template-rows: auto auto;
  gap: .5rem .7rem;
  align-items: start;
  transition: border-color .2s;
}
.line-item:focus-within { border-color: var(--muted); }
.line-item.speaker-a { border-left: 4px solid var(--accent); }
.line-item.speaker-b { border-left: 4px solid var(--blue); }

.line-num { grid-column: 1; grid-row: 1 / 3; align-self: center; font-family: var(--font-ui); font-weight: 700; font-size: .78rem; color: var(--muted); text-align: center; }
.line-top { grid-column: 2; grid-row: 1; display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.line-top-label { font-family: var(--font-ui); font-weight: 600; font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; white-space: nowrap; }

.speaker-select {
  flex: 1; min-width: 160px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-family: var(--font-ui); font-weight: 600; font-size: .88rem;
  padding: .38rem 2rem .38rem .7rem; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath fill='%237a8099' d='M5 6L0 0h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right .7rem center;
  cursor: pointer; transition: border-color .2s;
}
.speaker-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,197,71,.14); }

/* Κουμπί 🎵 ανά γραμμή */
.line-carpet-btn {
  grid-column: 3; grid-row: 1 / 3; align-self: center;
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--blue); width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: .85rem; transition: all .2s; flex-shrink: 0;
}
.line-carpet-btn:hover { border-color: var(--blue); background: rgba(91,156,246,.1); }

.line-delete-btn {
  grid-column: 4; grid-row: 1 / 3; align-self: center;
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--muted); width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: .85rem; transition: all .2s; flex-shrink: 0;
}
.line-delete-btn:hover { border-color: var(--error); color: var(--error); background: var(--error-bg); }

.line-textarea {
  grid-column: 2 / 5; grid-row: 2;
  width: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-family: var(--font-body); font-size: .97rem;
  padding: .55rem .85rem; resize: vertical; min-height: 68px; line-height: 1.6; transition: border-color .2s;
}
.line-textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,197,71,.14); }
.line-textarea::placeholder { color: var(--muted); font-style: italic; }

/* CARPET ITEM */
.carpet-item {
  background: rgba(91,156,246,.06); border: 2px dashed var(--blue); border-radius: var(--radius-sm);
  padding: .65rem 1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.carpet-label { font-family: var(--font-ui); font-weight: 600; font-size: .88rem; color: var(--blue); }
.carpet-delete {
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--muted); width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: .82rem; transition: all .2s; flex-shrink: 0;
}
.carpet-delete:hover { border-color: var(--error); color: var(--error); background: var(--error-bg); }

/* SCRIPT */
.script-format-example { display: flex; flex-direction: column; gap: .3rem; background: var(--bg); border-left: 3px solid var(--accent); padding: .8rem 1rem; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 1rem; }
.script-format-example code { font-family: 'Courier New', monospace; font-size: .83rem; color: var(--text); }

.textarea-input {
  width: 100%; background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font-family: var(--font-body); font-size: .97rem; padding: .65rem .95rem;
  resize: vertical; min-height: 180px; line-height: 1.7; transition: border-color .2s;
}
.textarea-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,197,71,.14); }
.textarea-input::placeholder { color: var(--muted); font-style: italic; }
.script-actions { display: flex; gap: .7rem; flex-wrap: wrap; margin-top: 1rem; }

/* BUTTONS */
.add-buttons { display: flex; gap: .7rem; flex-wrap: wrap; align-items: center; }

.btn-primary { background: var(--accent); color: #000; border: none; border-radius: var(--radius-sm); padding: .85rem 2rem; font-family: var(--font-ui); font-weight: 700; font-size: 1rem; cursor: pointer; transition: background .2s, transform .1s; }
.btn-primary:hover { background: var(--accent-dk); }
.btn-primary:active { transform: scale(.98); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }

.btn-add { background: var(--surface2); color: var(--text); border: 1px dashed var(--border); border-radius: var(--radius-sm); padding: .65rem 1.3rem; font-family: var(--font-ui); font-weight: 600; font-size: .9rem; cursor: pointer; transition: all .2s; }
.btn-add:hover { border-color: var(--accent); color: var(--accent); }

.btn-secondary { background: transparent; color: var(--muted); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .65rem 1.3rem; font-family: var(--font-ui); font-weight: 600; font-size: .88rem; cursor: pointer; transition: all .2s; }
.btn-secondary:hover { border-color: var(--muted); color: var(--text); }

.btn-download { display: inline-block; background: var(--blue); color: #fff; border: none; border-radius: var(--radius-sm); padding: .8rem 1.8rem; font-family: var(--font-ui); font-weight: 700; font-size: .95rem; text-decoration: none; transition: background .2s; }
.btn-download:hover { background: var(--blue-dk); }

/* EXPORT */
.export-card { border-color: rgba(232,197,71,.18); }
.export-options { margin-bottom: 1.2rem; }

/* ERROR */
.error-box { background: var(--error-bg); border: 1px solid var(--error); border-radius: var(--radius-sm); padding: .8rem 1rem; color: var(--error); font-size: .9rem; margin-bottom: 1rem; }

/* PROGRESS */
.progress-wrap { margin-top: 1.2rem; }
.progress-track { height: 10px; background: var(--surface2); border-radius: 99px; overflow: hidden; margin-bottom: .55rem; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--blue)); border-radius: 99px; width: 0%; transition: width .35s ease; }
.progress-label { font-family: var(--font-ui); font-size: .82rem; color: var(--muted); }

/* RESULT */
.result-wrap { margin-top: 1.2rem; padding: 1.3rem; background: var(--success-bg); border: 1px solid var(--green); border-radius: var(--radius-sm); }
.result-title { font-family: var(--font-ui); font-weight: 700; font-size: 1.05rem; color: var(--green); margin-bottom: .4rem; }
.result-audio { width: 100%; margin: .8rem 0; border-radius: var(--radius-sm); }
.result-actions { display: flex; gap: .7rem; flex-wrap: wrap; align-items: center; }

/* FOOTER */
footer { border-top: 1px solid var(--border); padding: 1.4rem; }
.footer-inner { display: block !important; color: var(--muted); font-size: .82rem; line-height: 1.9; }

/* RESPONSIVE */
@media (max-width: 540px) {
  .line-item {
    grid-template-columns: 24px 1fr 28px 28px;
  }
  .line-textarea { grid-column: 1 / 5; }
}

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }
@media (prefers-contrast: more) { :root { --border: #6a7099; --muted: #b0b8d0; } }