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

:root {
    --bg: #0d1117;
    --surface: #161b22;
    --surface-hover: #1c2129;
    --surface-raised: #21262d;
    --border: #30363d;
    --border-light: #484f58;
    --text: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #8957e5;
    --accent-blue: #58a6ff;
    --success: #3fb950;
    --success-bg: rgba(63, 185, 80, 0.1);
    --success-border: rgba(63, 185, 80, 0.3);
    --danger: #f85149;
    --danger-bg: rgba(248, 81, 73, 0.1);
    --danger-border: rgba(248, 81, 73, 0.3);
    --warning: #d29922;
    --warning-bg: rgba(210, 153, 34, 0.1);
    --warning-border: rgba(210, 153, 34, 0.3);
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 12px;
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    background: var(--bg);
    background-image: linear-gradient(180deg, #0d1117 0%, #161b22 100%);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden;
}

/* Hero aurora glow */
body::before {
    content: '';
    position: fixed;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 160%;
    height: 70%;
    background:
        radial-gradient(ellipse 80% 50% at 40% 60%, rgba(137, 87, 229, 0.18) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 60% 50%, rgba(88, 166, 255, 0.12) 0%, transparent 55%),
        radial-gradient(ellipse 50% 35% at 50% 70%, rgba(247, 120, 186, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Horizontal glow line */
body::after {
    content: '';
    position: fixed;
    top: 45%;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(137, 87, 229, 0.3) 15%,
        rgba(88, 166, 255, 0.5) 35%,
        rgba(137, 87, 229, 0.6) 50%,
        rgba(247, 120, 186, 0.4) 65%,
        rgba(137, 87, 229, 0.3) 85%,
        transparent 100%
    );
    box-shadow: 0 0 20px rgba(137, 87, 229, 0.3), 0 0 60px rgba(88, 166, 255, 0.15), 0 0 120px rgba(137, 87, 229, 0.1);
    pointer-events: none;
    z-index: 0;
}

/* ── Layout ── */
.page-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 2rem 1rem;
    position: relative;
    z-index: 1;
}

.container {
    width: 100%;
    max-width: 960px;
}

.card {
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(48, 54, 61, 0.4);
    position: relative;
    overflow: hidden;
    animation: scaleIn 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ── Logo ── */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    animation: fadeInUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.logo-icon:hover {
    transform: rotate(-8deg) scale(1.08);
    box-shadow: 0 0 16px rgba(88, 166, 255, 0.2);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--text);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #f0f6fc;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
    line-height: 1.6;
    animation: fadeInUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

/* ── Form ── */
textarea {
    width: 100%;
    min-height: 150px;
    padding: 1rem 1.125rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

textarea::placeholder { color: var(--text-muted); }

textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
    transform: translateY(-1px);
}

.char-count {
    text-align: right;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
    font-variant-numeric: tabular-nums;
}

fieldset {
    border: none;
    padding: 0;
    margin: 0;
    min-inline-size: 0;
}

.form-row {
    display: flex;
    gap: 0.875rem;
    margin-top: 1.25rem;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

select,
input[type="text"],
input[type="password"] {
    padding: 0.625rem 0.875rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236e7681' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
    cursor: pointer;
}

select:focus, input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

input[type="password"]:focus,
input[type="text"]:focus {
    transform: translateY(-1px);
}

input::placeholder { color: var(--text-muted); }

/* ── Toggle ── */
.toggle-row {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    margin-top: 1.25rem;
    padding: 0.75rem 1rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.toggle-row:hover { border-color: var(--border-light); }
.toggle-row:active { transform: scale(0.985); }

.toggle-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
}

.toggle-row .toggle-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: none;
    letter-spacing: normal;
    font-weight: 400;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:active:not(:disabled) { transform: scale(0.97); }

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

.btn-primary {
    background: var(--success);
    color: #fff;
    margin-top: 1.5rem;
    box-shadow: 0 2px 8px rgba(63, 185, 80, 0.2);
}

.btn-primary:hover {
    background: #2ea043;
    box-shadow: 0 4px 16px rgba(63, 185, 80, 0.3);
    transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0); }

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
    pointer-events: none;
}

.btn-primary:hover::after { left: 100%; }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    font-weight: 500;
    margin-top: 0.5rem;
}

.btn-ghost:hover {
    background: var(--surface);
    border-color: var(--border-light);
}

/* ── Result ── */
.result {
    margin-top: 2rem;
    display: none;
}

.result.visible {
    display: block;
    animation: fadeInUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.result-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.75rem;
}

.result-label svg {
    width: 14px;
    height: 14px;
    stroke: var(--success);
    fill: none;
    stroke-width: 2;
}

.result-link {
    word-break: break-all;
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-blue);
    line-height: 1.6;
    padding: 1rem;
    background: var(--bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    display: block;
    position: relative;
    overflow: hidden;
}

.result-link::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent 0%, rgba(88, 166, 255, 0.05) 45%, rgba(88, 166, 255, 0.1) 50%, rgba(88, 166, 255, 0.05) 55%, transparent 100%);
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
    pointer-events: none;
    border-radius: inherit;
}

/* ── Message (read page) ── */
.message-content {
    padding: 1rem 1.125rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    white-space: pre-wrap;
    word-break: break-word;
    font-family: inherit;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text);
    min-height: 150px;
    max-height: 300px;
    overflow: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-light) transparent;
    animation: fadeInUp 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.message-content::-webkit-scrollbar { width: 6px; height: 6px; }
.message-content::-webkit-scrollbar-track { background: transparent; }
.message-content::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
.message-content::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

.password-prompt { margin-top: 1.5rem; }

/* ── View prompt ── */
.view-prompt {
    text-align: center;
    padding: 2rem 1rem;
}

.view-prompt-icon {
    width: 64px;
    height: 64px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    animation: pulseGlow 2.5s ease-in-out infinite;
    transition: transform 0.3s ease;
}

.view-prompt-icon:hover { transform: scale(1.08); }

.view-prompt-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--accent-blue);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.view-prompt p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

/* ── Status ── */
.status {
    padding: 0.875rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.status-loading {
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.25);
    color: var(--accent-blue);
    animation: fadeIn 0.3s ease both;
}

.status-error {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
    animation: shake 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) both, fadeIn 0.3s ease both;
}

.status-warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning);
    animation: slideDown 0.3s ease both;
}

.destroyed-note {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    animation: fadeIn 0.5s ease 0.3s both;
}

.destroyed-note svg {
    width: 14px;
    height: 14px;
    stroke: var(--success);
    fill: none;
    stroke-width: 2;
    flex-shrink: 0;
}

/* ── Spinner ── */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(88, 166, 255, 0.2);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}

/* ── Keyframes ── */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.92); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(88, 166, 255, 0.2); }
    50% { box-shadow: 0 0 20px 4px rgba(88, 166, 255, 0.15); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    15%, 45%, 75% { transform: translateX(-6px); }
    30%, 60%, 90% { transform: translateX(6px); }
}

/* ── Entrance animations ── */
.card form,
.card .password-prompt,
.card .view-prompt {
    animation: fadeInUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) 0.3s both;
}

.feature {
    animation: fadeInUp 0.4s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.feature:nth-child(1) { animation-delay: 0.35s; }
.feature:nth-child(2) { animation-delay: 0.42s; }
.feature:nth-child(3) { animation-delay: 0.49s; }
.feature:nth-child(4) { animation-delay: 0.56s; }

.feature svg {
    transition: transform 0.25s ease, stroke 0.25s ease;
}

.feature:hover svg {
    transform: scale(1.2);
    stroke: var(--accent-blue);
}

footer {
    animation: fadeIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.6s both;
}

/* ── Features grid ── */
.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.feature svg {
    width: 16px;
    height: 16px;
    stroke: var(--accent);
    fill: none;
    stroke-width: 2;
    flex-shrink: 0;
    margin-top: 1px;
}

/* ── Footer ── */
footer {
    width: 100%;
    padding: 1.5rem 1rem;
    text-align: center;
    position: relative;
    z-index: 1;
}

.footer-content {
    max-width: 960px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-badges {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-badge {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.25s ease;
}

.footer-badge:hover { color: var(--text-secondary); }

.footer-badge svg {
    width: 12px;
    height: 12px;
    stroke: var(--text-muted);
    fill: none;
    stroke-width: 2;
    transition: stroke 0.25s ease, transform 0.25s ease;
}

.footer-badge:hover svg {
    stroke: var(--accent-blue);
    transform: scale(1.15);
}

.footer-copy {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ── Responsive ── */
@media (max-width: 640px) {
    .page-wrapper { padding: 1rem 0.75rem; }
    .card { padding: 1.75rem 1.25rem; border-radius: var(--radius); }
    .form-row { flex-direction: column; gap: 1rem; }
    .logo h1 { font-size: 1.25rem; }
    .logo-icon { width: 38px; height: 38px; }
    .logo-icon svg { width: 18px; height: 18px; }
    .features { grid-template-columns: 1fr; }
    .footer-badges { gap: 1rem; }
    .result-link { font-size: 0.7rem; }
    .btn { padding: 0.875rem 1.25rem; font-size: 0.875rem; }
    .view-prompt-icon { width: 52px; height: 52px; }
    .view-prompt-icon svg { width: 24px; height: 24px; }
    textarea { min-height: 120px; }
    input, select, textarea { font-size: 16px; }
}