:root {
    --background-color: #FFFAF0;
    --container-color: #f7eee1;
    --sub-container-color: #f0f0f0;
    --text-color: #000000;
    --primary-color: #2563eb;
    --secondary-color: #e5e7eb;
    --error-color: #dc2626;
    --success-color: #6ec617;
    --hover-color: #f1f5f9;
    --muted-color: #57534e;
    --border-color: #e5e7eb;
}

.dark-mode {
    --background-color: #121212;
    --container-color: #1a202c;
    --sub-container-color: #2d3748;
    --text-color: #ffffff;
    --primary-color: #1d4ed8;
    --secondary-color: #374151;
    --error-color: #f87171;
    --success-color: #4ade80;
    --hover-color: #323d4d;
    --muted-color: #cbd5e1;
    --border-color: #374151;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.6;
    transition: background-color 0.5s ease, color 0.5s ease;
}

.container {
    background-color: var(--container-color);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.logo {
    text-align: center;
    margin-bottom: 1.5rem;
}

.logo svg {
    width: 90px;
    height: 90px;
}

h1 {
    text-align: center;
    color: #2563eb;
    margin-bottom: 0.25rem;
    font-size: 2.25rem;
}

.subtitle {
    text-align: center;
    color: var(--muted-color);
    margin-top: 0;
    margin-bottom: 2rem;
}

/* ---------------------------------------------------------- step bar */

.steps {
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0 0 2rem;
    counter-reset: step;
}

.step {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 0.5rem;
    border-radius: 8px;
    background-color: var(--sub-container-color);
    color: var(--muted-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-size: 0.8rem;
    flex-shrink: 0;
}

.step.current {
    background-color: var(--primary-color);
    color: #ffffff;
}

.step.current .step-num {
    background-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
}

.step.done .step-num {
    background-color: var(--success-color);
    color: #ffffff;
}

/* ---------------------------------------------------------- form */

.field {
    margin-bottom: 1.75rem;
}

label,
.label-text {
    display: block;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.hint {
    margin: 0 0 0.6rem;
    font-size: 0.875rem;
    color: var(--muted-color);
    line-height: 1.5;
}

input[type="url"],
input[type="text"],
input[type="file"] {
    width: 100%;
    padding: 0.7rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--background-color);
    color: var(--text-color);
    font-size: 1rem;
    font-family: inherit;
    box-sizing: border-box;
}

input[type="url"]:focus,
input[type="text"]:focus,
input[type="file"]:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 1px;
}

#code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.days-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.days-row input[type="range"] {
    flex: 1;
    accent-color: var(--primary-color);
}

.days-value {
    min-width: 5.5rem;
    text-align: right;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--primary-color);
}

/* ---------------------------------------------------------- preview */

.ad-slot-preview {
    width: 100%;
    max-width: 600px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: repeating-conic-gradient(rgba(0, 0, 0, 0.06) 0% 25%, transparent 0% 50%)
        50% / 16px 16px;
    border: 2px dashed #f59e0b;
    border-radius: 0.5rem;
    overflow: hidden;
}

.ad-slot-preview img {
    max-width: 100%;
    max-height: 100%;
    /* Matches how the slot renders it: scaled to fit, never stretched. */
    object-fit: contain;
}

/* Step 3 shows the real thing, so it loses the dashed "empty slot" look. */
.ad-slot-preview.live {
    border-style: solid;
    border-color: #f59e0b;
    background: #ffffff;
}

.dark-mode .ad-slot-preview.live {
    background: #1f2937;
}

.preview-empty {
    font-size: 0.875rem;
    color: var(--muted-color);
}

/* ---------------------------------------------------------- sections */

.section {
    margin-bottom: 1.75rem;
}

.section h2 {
    color: #1d4ed8;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.dark-mode .section h2 {
    color: #93c5fd;
}

.summary-line {
    padding: 0.85rem 1rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    background-color: var(--sub-container-color);
    font-weight: 700;
    text-align: center;
}

.pilot-note {
    padding: 0.85rem 1rem;
    margin-bottom: 1.75rem;
    border-left: 4px solid var(--success-color);
    border-radius: 6px;
    background-color: var(--sub-container-color);
    font-size: 0.95rem;
}

.summary-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.5rem 1.25rem;
    margin: 0;
}

.summary-grid dt {
    font-weight: 600;
    color: var(--muted-color);
}

.summary-grid dd {
    margin: 0;
}

.summary-grid dd.wrap {
    overflow-wrap: anywhere;
}

.summary-grid a {
    color: var(--primary-color);
}

.dark-mode .summary-grid a {
    color: #93c5fd;
}

.success-badge {
    padding: 0.85rem 1rem;
    margin-bottom: 1.75rem;
    border-radius: 8px;
    background-color: var(--success-color);
    color: #ffffff;
    font-weight: 700;
    text-align: center;
}

/* ---------------------------------------------------------- buttons */

.primary-button {
    display: inline-block;
    width: 100%;
    padding: 0.85rem 1.25rem;
    border: none;
    border-radius: 8px;
    background-color: var(--primary-color);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    box-sizing: border-box;
    transition: background-color 0.2s ease, opacity 0.2s ease;
}

.primary-button:hover:not(:disabled) {
    background-color: #1d4ed8;
}

.primary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.link-button {
    display: block;
    margin: 1.25rem auto 0;
    padding: 0.35rem 0.5rem;
    border: none;
    background: none;
    color: var(--muted-color);
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: underline;
}

/* The override is the owner's, so it stays folded away instead of inviting
   every visitor to guess at it. */
.special-field {
    margin-top: 0.5rem;
}

.special-field .link-button {
    margin: 0;
    padding-left: 0;
}

.special-area {
    margin-top: 0.75rem;
    padding: 0.9rem 1rem;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    background-color: var(--sub-container-color);
}

.special-row {
    display: flex;
    gap: 0.6rem;
    align-items: stretch;
}

.special-row input {
    flex: 1;
    min-width: 0;
}

.secondary-button {
    padding: 0 1.1rem;
    border: none;
    border-radius: 8px;
    background-color: var(--secondary-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s ease;
}

.secondary-button:hover:not(:disabled) {
    background-color: var(--hover-color);
}

.secondary-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.special-ok {
    margin-top: 0.75rem;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    background-color: var(--success-color);
    color: #08290a;
    font-weight: 600;
    font-size: 0.9rem;
}

.special-ok[hidden] {
    display: none;
}

.code-area {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border-color);
}

.code-area .primary-button {
    margin-top: 1rem;
}

.error-box {
    margin: 0 0 1rem;
    padding: 0.7rem 0.9rem;
    border-radius: 8px;
    background-color: rgba(220, 38, 38, 0.12);
    border-left: 4px solid var(--error-color);
    color: var(--error-color);
    font-size: 0.925rem;
    font-weight: 600;
}

/* ---------------------------------------------------------- contact */

.contact-section {
    padding: 1.25rem;
    border-radius: 8px;
    background-color: var(--sub-container-color);
}

.contact-section h3 {
    margin-top: 0;
}

.whatsapp-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1.1rem;
    border-radius: 8px;
    background-color: #25d366;
    color: #ffffff;
    font-weight: 600;
    text-decoration: none;
}

.whatsapp-link:hover {
    background-color: #1ebe5b;
}

.whatsapp-link .whatsapp-icon {
    width: 1.25rem;
    height: 1.25rem;
}

.as-link {
    margin-top: 0.5rem;
}

@media (max-width: 600px) {
    .container {
        padding: 1.25rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .steps {
        font-size: 0.75rem;
    }

    .step {
        flex-direction: column;
        gap: 0.25rem;
        padding: 0.5rem 0.25rem;
    }

    .ad-slot-preview {
        height: 70px;
    }

    .summary-grid {
        grid-template-columns: 1fr;
        gap: 0.15rem;
    }

    .summary-grid dd {
        margin-bottom: 0.6rem;
    }
}