:root {
    --green: #25d366;
    --green-dark: #128c7e;
    --bg: #0b141a;
    --panel: #111b21;
    --border: #2a3942;
    --text: #e9edef;
    --muted: #8696a0;
    --error: #f87171;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Segoe UI, system-ui, sans-serif;
    background: linear-gradient(160deg, #071018 0%, #0b141a 40%, #0d1f1a 100%);
    color: var(--text);
    min-height: 100vh;
}

.installer {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 16px 48px;
}

.installer-header {
    text-align: center;
    margin-bottom: 24px;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    color: var(--green);
}

.installer-header p { color: var(--muted); margin: 8px 0 0; }

.steps {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
    margin-bottom: 20px;
}

.step {
    text-align: center;
    font-size: 0.65rem;
    color: var(--muted);
}

.step-num {
    display: inline-flex;
    width: 28px;
    height: 28px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border);
    margin-bottom: 4px;
}

.step.active .step-num,
.step.done .step-num {
    background: var(--green-dark);
    border-color: var(--green);
    color: white;
}

.step-label { display: block; }

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 20px 60px rgba(0,0,0,.35);
}

h1 { margin: 0 0 12px; font-size: 1.5rem; }

p { color: var(--muted); line-height: 1.6; }

.feature-list, .check-list {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.feature-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.check-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.check-list li.ok { color: #86efac; }
.check-list li.fail { color: var(--error); }
.check-list small { display: block; color: var(--muted); margin-top: 4px; }

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin: 20px 0;
}

.grid .full { grid-column: 1 / -1; }

label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--muted);
}

input, select {
    background: #1f2c34;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 1rem;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--green);
}

.actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary { background: var(--green); color: #042016; }
.btn-secondary { background: #1f2c34; color: var(--text); border: 1px solid var(--border); }
.btn-disabled { background: #374151; color: #9ca3af; padding: 12px 20px; border-radius: 999px; }

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 16px;
}

.alert-error {
    background: rgba(248,113,113,.15);
    border: 1px solid rgba(248,113,113,.4);
    color: #fecaca;
}

.log-box {
    background: #0a1014;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
    font-family: Consolas, monospace;
    font-size: 0.8rem;
    max-height: 200px;
    overflow: auto;
    margin: 16px 0;
}

.log-box.success { border-color: var(--green-dark); }

.success-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--green-dark);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 16px 0;
}

.hint { font-size: 0.85rem; margin-top: 20px; }

.installer-footer {
    text-align: center;
    color: var(--muted);
    font-size: 0.8rem;
    margin-top: 24px;
}

@media (max-width: 640px) {
    .steps { grid-template-columns: repeat(3, 1fr); row-gap: 10px; }
    .grid { grid-template-columns: 1fr; }
}