:root {
    --bg-color: #0d0d0d;
    --card-bg: #1c1c1e;
    --text-primary: #ffffff;
    --text-secondary: #98989d;
    --accent: #0a84ff;
    --accent-dim: rgba(10, 132, 255, 0.2);
    --success: #30d158;
    --error: #ff453a;
    --border-radius: 12px;
    --spacing: 20px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing);
    line-height: 1.5;
}

.container {
    width: 100%;
    max-width: 480px;
    position: relative;
}

section {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

section.active {
    display: block;
}

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

h1 {
    font-size: 3rem;
    font-weight: 300;
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.05em;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 40px;
}

.card {
    background-color: var(--card-bg);
    padding: 24px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    border: 1px solid rgba(255,255,255,0.05);
}

.info-card p {
    margin-bottom: 16px;
    color: #d0d0d0;
}

.data-notice {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0 !important;
}

.input-group {
    margin-bottom: 32px;
}

.input-group label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

input, textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid #333;
    color: white;
    font-family: var(--font-main);
    font-size: 1.2rem;
    padding: 8px 0;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, textarea:focus {
    border-color: var(--accent);
}

textarea {
    border: 1px solid #333;
    padding: 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    min-height: 100px;
    margin-top: 10px;
}

button {
    width: 100%;
    padding: 16px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.1s;
}

button:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    margin-bottom: 12px;
}

.btn-secondary {
    background-color: rgba(255,255,255,0.1);
    color: white;
}

.footer {
    margin-top: 40px;
    text-align: center;
    color: #444;
    font-size: 0.75rem;
}

/* Running State Styles */
.step-list {
    margin: 30px 0;
}

.step {
    display: flex;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.step .icon {
    width: 24px;
    height: 24px;
    border: 2px solid #333;
    border-radius: 50%;
    margin-right: 16px;
    flex-shrink: 0;
}

.step.running .icon {
    border-color: var(--accent);
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

.step.done .icon {
    border-color: var(--success);
    background-color: var(--success);
    position: relative;
}

/* Checkmark hack */
.step.done .icon::after {
    content: '';
    position: absolute;
    width: 5px;
    height: 9px;
    border: solid black;
    border-width: 0 2px 2px 0;
    top: 5px;
    left: 8px;
    transform: rotate(45deg);
}

.step.error .icon {
    border-color: var(--error);
    background-color: var(--error);
}

.step .label {
    flex-grow: 1;
    font-weight: 500;
}

.step .status {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

#console-output {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: #555;
    margin-top: 20px;
    height: 100px;
    overflow-y: auto;
    padding: 10px;
    background: #111;
    border-radius: 6px;
}

/* Result State Styles */
.result-summary .result-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dotted rgba(255,255,255,0.1);
}

.result-row:last-child { border-bottom: none; }

.result-row .val {
    font-family: var(--font-mono);
    color: white;
}

.root-cause-box {
    border: 1px solid var(--accent);
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    background: var(--accent-dim);
}

.root-cause-box label {
    display: block;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.root-cause-box p {
    font-size: 1.1rem;
    line-height: 1.4;
}

.hidden { display: none; }