/* ============================================================
   IPv4 to IPv6 Converter Pro – Professional Card UI
   ============================================================ */
:root {
    --bg: #f4f6f9;
    --card-bg: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #4a4a6a;
    --border: #e2e8f0;
    --shadow: 0 8px 24px rgba(0,0,0,0.06);
    --red: #db0601;
    --blue: #003a87;
    --green: #0d9488;
    --orange: #ea580c;
    --purple: #7c3aed;
    --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --bg: #0f1117;
    --card-bg: #1c1e26;
    --text: #e4e6f0;
    --text-secondary: #a0a4b8;
    --border: #2e3140;
    --shadow: 0 8px 24px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; }

.ipv6-converter-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    font-family: var(--font);
    color: var(--text);
}

.ipal-card-view {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: background var(--transition), border var(--transition), box-shadow var(--transition);
    animation: fadeUp 0.5s ease forwards;
}

.ipal-card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
}

.ipal-card-header-row h5,
.ipal-full-header h5 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0;
    color: var(--text);
}

.ipal-full-header {
    text-align: center;
    margin-bottom: 16px;
}

.ipal-full-header h5 { font-size: 1.4rem; }

.ipal-action-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.ipal-icon-btn {
    background: rgba(128,128,128,0.1);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 14px;
    color: var(--text);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    font-family: var(--font);
}

.ipal-icon-btn:hover {
    background: rgba(128,128,128,0.25);
    transform: translateY(-1px);
}

.ipal-icon-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.ipal-red-btn {
    display: block;
    width: 100%;
    background: var(--red);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    text-align: center;
    padding: 14px 20px;
    border-radius: 12px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    letter-spacing: 0.3px;
    font-family: var(--font);
}

.ipal-red-btn:hover {
    background: #b80501;
    transform: scale(1.02);
    color: #fff;
}

.ipal-blue-btn {
    display: block;
    width: 100%;
    background: var(--blue);
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    text-align: center;
    padding: 14px 20px;
    border-radius: 12px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    letter-spacing: 0.3px;
    font-family: var(--font);
}

.ipal-blue-btn:hover {
    background: #002c66;
    transform: scale(1.02);
    color: #fff;
}

.ipal-clean-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.ipal-clean-list > div {
    display: flex;
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.ipal-clean-list > div:last-child { border-bottom: none; }

.ipal-clean-list span:first-child {
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
    flex: 0 0 45%;
    max-width: 45%;
}

.ipal-clean-list span:last-child {
    color: var(--text-secondary);
    font-weight: 500;
    text-align: right;
    word-break: break-word;
    flex: 1;
    font-size: 0.95rem;
}

.ipal-cards-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.ipal-cards-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.ipal-detail-card h3 {
    margin: 0 0 15px 0;
    font-size: 1.1rem;
    font-weight: 700;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.ipv6-hero {
    text-align: center;
    padding: 40px 24px;
}

.ipv6-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    margin: 0 0 12px 0;
    color: var(--text);
    letter-spacing: -0.5px;
}

.ipv6-hero .subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0 0 24px 0;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.ipv6-hero-btns {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

.ipv6-hero-btns .ipal-red-btn,
.ipv6-hero-btns .ipal-blue-btn {
    width: auto;
    min-width: 160px;
    padding: 14px 28px;
}

.ipv6-input-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.ipv6-input-group input {
    flex: 1;
    min-width: 220px;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    font-size: 1rem;
    font-family: var(--font);
    background: var(--card-bg);
    color: var(--text);
    transition: border 0.2s, box-shadow 0.2s;
    outline: none;
}

.ipv6-input-group input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(0,58,135,0.1);
}

.ipv6-input-group input.error {
    border-color: var(--red);
    animation: shake 0.4s ease;
}

.ipv6-input-group input.success { border-color: var(--green); }

@keyframes shake {
    0%,100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    50% { transform: translateX(6px); }
    75% { transform: translateX(-4px); }
}

.ipv6-result-highlight {
    background: rgba(0,58,135,0.05);
    border: 1px solid rgba(0,58,135,0.2);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    text-align: center;
    font-size: 1.3rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    color: var(--blue);
    word-break: break-all;
    letter-spacing: 0.5px;
}

[data-theme="dark"] .ipv6-result-highlight {
    background: rgba(59,130,246,0.1);
    border-color: rgba(59,130,246,0.3);
    color: #60a5fa;
}

.ipv6-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #1a1a2e;
    color: #fff;
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    z-index: 99999;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
    font-family: var(--font);
}

.ipv6-toast.show { transform: translateX(-50%) translateY(0); }

.ipv6-bulk-textarea {
    width: 100%;
    min-height: 140px;
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    font-size: 0.95rem;
    font-family: 'Courier New', monospace;
    background: var(--card-bg);
    color: var(--text);
    resize: vertical;
    outline: none;
}

.ipv6-bulk-textarea:focus { border-color: var(--blue); }

.ipv6-comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.ipv6-comparison-table th,
.ipv6-comparison-table td {
    padding: 12px 14px;
    border: 1px solid var(--border);
    text-align: left;
}

.ipv6-comparison-table th {
    background: rgba(128,128,128,0.08);
    font-weight: 700;
    color: var(--text);
}

.ipv6-comparison-table td { color: var(--text-secondary); }

.ipv6-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.ipv6-badge-public { background:#dcfce7; color:#166534; }
.ipv6-badge-private { background:#fef3c7; color:#92400e; }
.ipv6-badge-loopback { background:#e0e7ff; color:#3730a3; }
.ipv6-badge-reserved { background:#fce7f3; color:#9d174d; }
.ipv6-badge-multicast { background:#f3e8ff; color:#6b21a8; }

[data-theme="dark"] .ipv6-badge-public { background:rgba(22,163,74,0.2); color:#4ade80; }
[data-theme="dark"] .ipv6-badge-private { background:rgba(217,119,6,0.2); color:#fbbf24; }
[data-theme="dark"] .ipv6-badge-loopback { background:rgba(79,70,229,0.2); color:#a5b4fc; }
[data-theme="dark"] .ipv6-badge-reserved { background:rgba(219,39,119,0.2); color:#f9a8d4; }
[data-theme="dark"] .ipv6-badge-multicast { background:rgba(147,51,234,0.2); color:#c4b5fd; }

.ipv6-dark-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transition: all var(--transition);
}

.ipv6-dark-toggle:hover { transform: scale(1.08); }

@keyframes fadeUp {
    from { opacity:0; transform:translateY(12px); }
    to { opacity:1; transform:translateY(0); }
}

/* Responsive */
@media (max-width: 900px) {
    .ipal-cards-grid { grid-template-columns: 1fr; }
    .ipal-cards-grid-3 { grid-template-columns: 1fr 1fr; }
    .ipv6-hero h1 { font-size: 1.8rem; }
}

@media (max-width: 600px) {
    .ipv6-converter-wrapper { margin:15px auto; padding:0 12px; gap:20px; }
    .ipal-card-view { padding:18px; }
    .ipal-cards-grid-3 { grid-template-columns: 1fr; }
    .ipv6-hero h1 { font-size:1.5rem; }
    .ipv6-hero-btns .ipal-red-btn,
    .ipv6-hero-btns .ipal-blue-btn { width:100%; min-width:auto; }
    .ipv6-input-group { flex-direction: column; }
    .ipv6-input-group input { min-width:auto; }
}