/* ============================================================
   Multi Downloader — Design System inspired by Starbucks
   - Warm cream canvas, four-tier green palette
   - Full-pill buttons, whisper-soft layered shadows
   - SoDoSans substitute: Inter
   ============================================================ */

:root {
  /* Greens */
  --starbucks-green: #006241;
  --green-accent:    #00754A;
  --house-green:     #1E3932;
  --green-uplift:    #2b5148;
  --green-light:     #d4e9e2;

  /* Surface & canvas */
  --white:        #ffffff;
  --neutral-cool: #f9f9f9;
  --neutral-warm: #f2f0eb;
  --ceramic:      #edebe9;
  --black:        #000000;

  /* Text */
  --text-black:       rgba(0, 0, 0, 0.87);
  --text-black-soft:  rgba(0, 0, 0, 0.58);
  --text-white:       rgba(255, 255, 255, 1);
  --text-white-soft:  rgba(255, 255, 255, 0.70);

  /* Semantic */
  --red:        #c82014;
  --red-tint:   hsl(4 82% 43% / 5%);
  --green-tint: hsl(160 32% 87% / 33%);
  --yellow:     #fbbc05;
  --gold:       #cba258;

  /* Inputs / borders */
  --input-border: #d6dbde;
  --hairline:     #e7e7e7;

  /* Radius */
  --r-card:   12px;
  --r-pill:   50px;
  --r-input:  4px;

  /* Shadows */
  --shadow-card:
    0 0 0.5px rgba(0, 0, 0, 0.14),
    0 1px 1px rgba(0, 0, 0, 0.24);
  --shadow-nav:
    0 1px 3px rgba(0, 0, 0, 0.10),
    0 2px 2px rgba(0, 0, 0, 0.06),
    0 0 2px rgba(0, 0, 0, 0.07);
  --shadow-frap:
    0 0 6px rgba(0, 0, 0, 0.24),
    0 8px 12px rgba(0, 0, 0, 0.14);

  /* Motion */
  --t-base: all 0.2s ease;
  --press:  scale(0.95);

  /* Type */
  --font-sans: "Inter", "SoDoSans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --tracking-tight: -0.01em;
}

* { box-sizing: border-box; }

html {
  /* 1rem = 10px convenience (Starbucks site uses this trick) */
  font-size: 62.5%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.6rem;          /* 16px */
  line-height: 1.5;
  letter-spacing: var(--tracking-tight);
  color: var(--text-black);
  background: var(--neutral-warm);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Top "Join now" style strip ---------- */
.top-strip {
  background: var(--house-green);
  color: var(--text-white);
  padding: 1.2rem 1.6rem;
  text-align: center;
  font-size: 1.3rem;
  letter-spacing: var(--tracking-tight);
}
.top-strip strong { font-weight: 600; }

/* ---------- Container / page ---------- */
.container {
  width: 100%;
  max-width: 720px;
  margin: 4rem auto;
  padding: 0 1.6rem;
  flex: 1;
}

/* ---------- Header / hero ---------- */
header {
  margin-bottom: 3.2rem;
  text-align: left;
}

.header-row {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 0.8rem;
}

header h1 {
  margin: 0;
  font-size: 2.8rem;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.16px;
  color: var(--starbucks-green);
}

.version-badge {
  display: inline-flex;
  align-items: center;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.4px;
  padding: 0.3rem 1rem;
  border-radius: var(--r-pill);
  background: var(--green-light);
  color: var(--starbucks-green);
  border: 1px solid var(--green-light);
}

.subtitle {
  margin: 0;
  color: var(--text-black);
  font-size: 1.6rem;
  line-height: 1.5;
  max-width: 56ch;
}
.subtitle strong { font-weight: 600; color: var(--starbucks-green); }

/* ---------- Card ---------- */
.card {
  background: var(--white);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  padding: 2.4rem;
}

/* ---------- Form ---------- */
form {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

.field-label {
  display: block;
  font-size: 1.3rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.325px;
  color: var(--text-black);
  margin-bottom: 0.8rem;
}

.input-row {
  display: flex;
  gap: 0.8rem;
  align-items: stretch;
}

input[type="url"] {
  flex: 1;
  padding: 1.4rem 1.6rem;
  border-radius: var(--r-input);
  border: 1px solid var(--input-border);
  font-family: inherit;
  font-size: 1.6rem;
  letter-spacing: var(--tracking-tight);
  background: var(--white);
  color: var(--text-black);
  outline: none;
  transition: var(--t-base);
}

input[type="url"]::placeholder {
  color: var(--text-black-soft);
}

input[type="url"]:focus {
  border-color: var(--green-accent);
  box-shadow: 0 0 0 3px var(--green-tint);
}

input[type="url"]:invalid:not(:placeholder-shown) {
  border-color: var(--red);
  background: var(--red-tint);
}

.actions-row {
  display: flex;
  gap: 1.2rem;
  justify-content: flex-start;
  flex-wrap: wrap;
}

/* ---------- Buttons (all full-pill) ---------- */
button,
.btn {
  font-family: inherit;
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: var(--tracking-tight);
  line-height: 1.2;
  border-radius: var(--r-pill);
  padding: 0.9rem 2rem;
  cursor: pointer;
  transition: var(--t-base);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-black);
}

button:active:not(:disabled),
.btn:active:not(:disabled) {
  transform: var(--press);
}

button:disabled,
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary filled — Green Accent */
.primary-btn {
  background: var(--green-accent);
  color: var(--white);
  border-color: var(--green-accent);
  padding: 1rem 2.4rem;
  font-size: 1.6rem;
  min-width: 14rem;
}
.primary-btn:hover:not(:disabled) {
  background: var(--starbucks-green);
  border-color: var(--starbucks-green);
}

/* Secondary outlined — Green Accent border */
.secondary-btn {
  background: transparent;
  color: var(--green-accent);
  border-color: var(--green-accent);
  padding: 1rem 2rem;
}
.secondary-btn:hover:not(:disabled) {
  background: var(--green-tint);
}

/* Icon-only clear button */
.icon-btn {
  background: transparent;
  color: var(--text-black);
  border: 1px solid var(--input-border);
  border-radius: 50%;
  width: 4rem;
  height: 4rem;
  padding: 0;
  font-size: 1.6rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
}
.icon-btn:hover { background: var(--neutral-cool); }

/* Inline link-style buttons in the log panel */
.link-btn {
  background: transparent;
  border: none;
  color: var(--green-accent);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}
.link-btn:hover { color: var(--starbucks-green); }
.link-btn:active { transform: var(--press); }

/* ---------- Status messages ---------- */
#status {
  margin-top: 2rem;
  min-height: 1.4em;
  font-size: 1.4rem;
  color: var(--text-black-soft);
}
#status.error   { color: var(--red); }
#status.success { color: var(--green-accent); font-weight: 600; }

/* ---------- Result section ---------- */
#result {
  margin-top: 2.4rem;
  background: var(--white);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  padding: 2.4rem;
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
}

video {
  width: 100%;
  max-height: 520px;
  background: var(--black);
  border-radius: var(--r-card);
  display: block;
}

#caption {
  margin: 0;
  font-size: 1.4rem;
  color: var(--text-black-soft);
  line-height: 1.5;
  word-break: break-word;
}

.download-btn {
  align-self: flex-start;
  background: var(--green-accent);
  color: var(--white);
  border: 1px solid var(--green-accent);
  padding: 1.2rem 2.8rem;
  border-radius: var(--r-pill);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.6rem;
  letter-spacing: var(--tracking-tight);
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  transition: var(--t-base);
}
.download-btn:hover { background: var(--starbucks-green); border-color: var(--starbucks-green); }
.download-btn:active { transform: var(--press); }

/* ---------- Log panel (feature-band styled) ---------- */
#log-panel {
  margin-top: 2.4rem;
  background: var(--house-green);
  border-radius: var(--r-card);
  overflow: hidden;
}

.log-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.6rem;
  background: var(--green-uplift);
  color: var(--text-white);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.log-header .link-btn {
  color: var(--text-white);
  text-decoration: underline;
}
.log-header .link-btn:hover { color: var(--green-light); }

.log-actions {
  display: flex;
  gap: 1.6rem;
}

#log {
  margin: 0;
  padding: 1.6rem;
  max-height: 28rem;
  overflow-y: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 1.3rem;
  line-height: 1.5;
  color: var(--text-white-soft);
  white-space: pre-wrap;
  word-break: break-all;
}

.log-line   { padding: 1px 0; }
.log-info   { color: var(--text-white-soft); }
.log-success{ color: var(--green-light); }
.log-warn   { color: var(--yellow); }
.log-error  { color: #ff9d96; }

/* ---------- Footer (dark-green espresso bookend) ---------- */
footer {
  background: var(--house-green);
  color: var(--text-white-soft);
  text-align: center;
  padding: 3.2rem 1.6rem;
  margin-top: 4rem;
  font-size: 1.3rem;
  letter-spacing: var(--tracking-tight);
}
footer small { color: var(--text-white-soft); }

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  html { font-size: 56.25%; } /* slight downscale on small phones */
  .container { margin: 2rem auto; }
  header h1 { font-size: 2.4rem; }
  .input-row { flex-direction: column; align-items: stretch; }
  .icon-btn { align-self: flex-end; }
  .actions-row { flex-direction: column; }
  .primary-btn, .secondary-btn { width: 100%; }
  .download-btn { align-self: stretch; justify-content: center; }
}