/* ─── Self-hosted fonts (OFL) ──────────────────────────────────────
   JetBrains Mono & Syne, served locally from ./fonts/ so no request
   ever leaves the origin. latin + latin-ext subsets; German umlauts
   (ä ö ü ß) live in the latin range. See fonts/*-OFL.txt for licenses.
   ────────────────────────────────────────────────────────────────── */
@font-face {
  font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400;
  font-display: swap; src: url('fonts/jetbrains-mono-400.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400;
  font-display: swap; src: url('fonts/jetbrains-mono-400-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: 'JetBrains Mono'; font-style: normal; font-weight: 600;
  font-display: swap; src: url('fonts/jetbrains-mono-600.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono'; font-style: normal; font-weight: 600;
  font-display: swap; src: url('fonts/jetbrains-mono-600-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: 'Syne'; font-style: normal; font-weight: 500;
  font-display: swap; src: url('fonts/syne-500.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: 'Syne'; font-style: normal; font-weight: 500;
  font-display: swap; src: url('fonts/syne-500-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: 'Syne'; font-style: normal; font-weight: 700;
  font-display: swap; src: url('fonts/syne-700.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: 'Syne'; font-style: normal; font-weight: 700;
  font-display: swap; src: url('fonts/syne-700-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face {
  font-family: 'Syne'; font-style: normal; font-weight: 800;
  font-display: swap; src: url('fonts/syne-800.woff2') format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face {
  font-family: 'Syne'; font-style: normal; font-weight: 800;
  font-display: swap; src: url('fonts/syne-800-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

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

:root {
  --bg:          #0a0e1a;
  --bg-card:     #111827;
  --bg-card2:    #161d2e;
  --bg-input:    #0d1424;
  --border:      rgba(99,140,255,0.15);
  --border-hi:   rgba(99,140,255,0.35);
  --accent:      #4f8cff;
  --accent-dim:  rgba(79,140,255,0.12);
  --accent-glow: rgba(79,140,255,0.25);
  --green:       #22d3a0;
  --green-dim:   rgba(34,211,160,0.12);
  --red:         #f05050;
  --red-dim:     rgba(240,80,80,0.1);
  --text-1:      #e8eeff;
  --text-2:      #8a9ac0;
  --text-3:      #4a5578;
  --mono:        'JetBrains Mono', monospace;
  --sans:        'Syne', sans-serif;
  --radius:      12px;
  --radius-sm:   8px;
  --safe-top:    env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── Background ───────────────────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,140,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,140,255,0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(79,140,255,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ─── App Shell ────────────────────────────────────────────────── */
.app-shell {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 16px;
  padding-top: calc(var(--safe-top) + 16px);
  padding-bottom: calc(var(--safe-bottom) + 24px);
}

/* ─── Header ───────────────────────────────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 0 24px;
}

.header-icon {
  width: 44px;
  height: 44px;
  background: var(--accent-dim);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.header-icon svg { width: 24px; height: 24px; }

.header-text { flex: 1; }

.header-text h1 {
  font-family: var(--sans);
  font-size: 22px;
  font-weight: 800;
  color: var(--text-1);
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.header-text p {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  margin-top: 2px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ─── Install Button ───────────────────────────────────────────── */
.install-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--accent-dim);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.install-btn svg { width: 16px; height: 16px; }
.install-btn:hover { background: rgba(79,140,255,0.2); border-color: var(--accent); }

/* ─── Main ─────────────────────────────────────────────────────── */
.app-main { flex: 1; display: flex; flex-direction: column; gap: 14px; }

/* ─── Info Banner ──────────────────────────────────────────────── */
.info-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
  row-gap: 4px;
}

.info-tag {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  font-family: var(--sans);
}

.info-mono {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.info-sep { color: var(--text-3); }

/* ─── Cards ────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color 0.2s;
}

.card:focus-within { border-color: var(--border-hi); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card-header h2 {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* ─── Buttons ──────────────────────────────────────────────────── */
.btn-add, .btn-copy {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid;
}

.btn-add {
  background: var(--accent-dim);
  border-color: var(--border-hi);
  color: var(--accent);
}
.btn-add:hover { background: rgba(79,140,255,0.2); border-color: var(--accent); }
.btn-add svg { width: 14px; height: 14px; }

.btn-copy {
  background: var(--green-dim);
  border-color: rgba(34,211,160,0.25);
  color: var(--green);
}
.btn-copy:hover:not(:disabled) { background: rgba(34,211,160,0.2); border-color: var(--green); }
.btn-copy:disabled { opacity: 0.3; cursor: not-allowed; }
.btn-copy svg { width: 14px; height: 14px; }

/* ─── IP List ──────────────────────────────────────────────────── */
.ip-list { display: flex; flex-direction: column; gap: 10px; }

.ip-row {
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ip-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  min-width: 18px;
  text-align: right;
}

.ip-input {
  flex: 1;
  height: 44px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-1);
  font-family: var(--mono);
  font-size: 15px;
  padding: 0 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

.ip-input::placeholder { color: var(--text-3); }
.ip-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.ip-input.invalid {
  border-color: var(--red);
  box-shadow: 0 0 0 3px var(--red-dim);
}

.btn-remove {
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex-shrink: 0;
}
.btn-remove:hover { background: var(--red-dim); border-color: var(--red); color: var(--red); }
.btn-remove svg { width: 14px; height: 14px; }

/* ─── Result ───────────────────────────────────────────────────── */
.result-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.result-value {
  font-family: var(--mono);
  font-size: clamp(16px, 4vw, 22px);
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.08em;
  word-break: break-all;
  line-height: 1.4;
  min-height: 32px;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: color 0.2s;
}

.result-value.empty { color: var(--text-3); }

.error-msg {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--red);
  margin-top: 8px;
  min-height: 18px;
}

/* ─── Breakdown ────────────────────────────────────────────────── */
.breakdown { margin-top: 16px; }

.breakdown-title {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: 10px;
  font-family: var(--sans);
}

.breakdown-grid {
  display: grid;
  gap: 6px;
}

.breakdown-row {
  display: grid;
  grid-template-columns: 120px 80px 1fr;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  padding: 8px 10px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  animation: slideIn 0.15s ease;
}

.breakdown-row .bd-label { color: var(--text-3); font-family: var(--sans); }
.breakdown-row .bd-hex   { font-family: var(--mono); color: var(--accent); font-weight: 600; }
.breakdown-row .bd-desc  { font-family: var(--mono); color: var(--text-2); font-size: 11px; }

/* ─── Config Block ─────────────────────────────────────────────── */
.config-block {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-2);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow-x: auto;
  white-space: pre;
  -webkit-overflow-scrolling: touch;
}

.config-block .placeholder { color: var(--text-3); }
.config-block .hl-key    { color: var(--accent); }
.config-block .hl-val    { color: var(--green); }

/* ─── Toast ────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: calc(var(--safe-bottom) + 24px);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card2);
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  padding: 10px 22px;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--text-1);
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 999;
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Footer ───────────────────────────────────────────────────── */
.app-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.05em;
}

/* ─── Responsive ───────────────────────────────────────────────── */
@media (max-width: 380px) {
  .breakdown-row { grid-template-columns: 90px 70px 1fr; }
  .info-banner { gap: 6px; }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:          #f0f4ff;
    --bg-card:     #ffffff;
    --bg-card2:    #f8faff;
    --bg-input:    #f0f4ff;
    --border:      rgba(79,140,255,0.2);
    --border-hi:   rgba(79,140,255,0.45);
    --accent:      #2563eb;
    --accent-dim:  rgba(37,99,235,0.08);
    --accent-glow: rgba(37,99,235,0.15);
    --green:       #059669;
    --green-dim:   rgba(5,150,105,0.08);
    --red:         #dc2626;
    --red-dim:     rgba(220,38,38,0.08);
    --text-1:      #0f172a;
    --text-2:      #475569;
    --text-3:      #94a3b8;
  }
  .bg-grid {
    background-image:
      linear-gradient(rgba(37,99,235,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(37,99,235,0.05) 1px, transparent 1px);
  }
  .bg-glow {
    background: radial-gradient(ellipse, rgba(37,99,235,0.06) 0%, transparent 70%);
  }
}