/* ============================================================
   Enlace Universal Amazon - Estilo naranja + tarjeta blanca
   ============================================================ */

:root {
    --bg-page:    #f5f5f7;
    --bg-card:    #ffffff;
    --bg-input:   #ffffff;
    --border:     #e5e5e7;
    --border-h:   #d4d4d8;
    --text:       #1a1a1a;
    --text-dim:   #4a4a4a;
    --text-muted: #71717a;
    --orange:     #ff9900;
    --orange-h:   #e88b00;
    --orange-d:   #cc7a00;
    --blue:       #2563eb;
    --blue-h:     #1d4ed8;
    --success:   #22c55e;
    --radius:    10px;
    --radius-lg: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
    background: var(--bg-page);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter',
                 Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ----- Hero (cabecera naranja) ----- */
.hero {
    background: linear-gradient(135deg, var(--orange) 0%, var(--orange-h) 100%);
    color: #fff;
    padding: 60px 24px 80px;
    text-align: center;
    position: relative;
}

.hero-small {
    padding: 32px 24px 60px;
}

.hero-content {
    max-width: 720px;
    margin: 0 auto;
}

.hero-title {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 14px;
    line-height: 1.2;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.hero-small .hero-title {
    font-size: 24px;
}

.hero-subtitle {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: 8px;
    font-weight: 400;
}

.hero-tagline {
    font-size: 16px;
    font-weight: 600;
    margin-top: 14px;
    opacity: 0.9;
}

/* ----- Container ----- */
.container {
    width: 100%;
    max-width: 560px;
    margin: -50px auto 0;
    padding: 0 24px;
    flex: 1;
    position: relative;
    z-index: 2;
}

/* ----- Card ----- */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08),
                0 2px 8px rgba(0, 0, 0, 0.04);
    text-align: center;
}

.card-icon {
    font-size: 48px;
    margin-bottom: 16px;
    line-height: 1;
}

.card-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text);
    margin-bottom: 8px;
}

.card-subtitle {
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 28px;
    line-height: 1.5;
}

/* ----- Formulario ASIN ----- */
.asin-form {
    text-align: left;
    margin-bottom: 16px;
}

.asin-form label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 8px;
    letter-spacing: 0.01em;
}

.asin-form input[type="text"] {
    width: 100%;
    background: var(--bg-input);
    border: 2px solid var(--orange);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 18px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;
    text-align: center;
    letter-spacing: 0.05em;
    padding: 14px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.asin-form input[type="text"]:focus {
    outline: none;
    border-color: var(--orange-d);
    box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.2);
}

.asin-form input[type="text"]::placeholder {
    color: var(--text-muted);
    font-family: inherit;
}

/* ----- Botón primario ----- */
.btn-primary {
    width: 100%;
    background: var(--orange);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    padding: 14px 20px;
    margin-top: 14px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.05s ease;
    box-shadow: 0 2px 6px rgba(255, 153, 0, 0.3);
}

.btn-primary:hover { background: var(--orange-h); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

/* ----- Resultado del enlace ----- */
.result {
    margin-top: 24px;
    animation: fadein 0.3s ease;
    text-align: left;
}

@keyframes fadein {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.result-label {
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.result-link {
    background: var(--bg-page);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 12px;
}

.result-link a {
    color: var(--blue);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    word-break: break-all;
    display: block;
}

.result-link a:hover {
    color: var(--blue-h);
    text-decoration: underline;
}

.btn-copy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    background: var(--blue);
    color: #fff;
    border: 1px solid var(--blue);
    border-radius: var(--radius);
    padding: 11px 16px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-copy:hover {
    background: var(--blue-h);
    border-color: var(--blue-h);
}

.btn-copy.copied {
    background: var(--success);
    border-color: var(--success);
}

/* ----- Ayuda ----- */
.help {
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
    text-align: center;
}

.help code {
    background: var(--bg-page);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;
    color: var(--text-dim);
    font-size: 12px;
    word-break: break-all;
    display: inline-block;
    margin-top: 6px;
}

.help strong {
    color: var(--orange-d);
    font-weight: 700;
}

/* ----- Badge ASIN ----- */
.asin-badge {
    display: inline-block;
    background: #fff7e6;
    border: 1px solid var(--orange);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 20px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;
}

.asin-badge strong {
    color: var(--orange-d);
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* ----- Loader ----- */
.loader-wrap {
    margin: 24px 0;
    cursor: pointer;
}

.loader {
    width: 44px;
    height: 44px;
    border: 3px solid var(--border);
    border-top-color: var(--orange);
    border-radius: 50%;
    margin: 0 auto 16px;
    animation: spin 0.8s linear infinite;
}

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

.loader-text {
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 6px;
}

.detected {
    color: var(--text-muted);
    font-size: 13px;
}

.detected strong {
    color: var(--text-dim);
    font-weight: 600;
}

/* ----- Selector ----- */
.selector-wrap {
    margin: 28px 0 0;
    text-align: left;
    animation: fadein 0.3s ease;
}

.selector-wrap label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 8px;
    text-align: center;
}

.selector-wrap select {
    width: 100%;
    background: var(--bg-input);
    border: 2px solid var(--orange);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 15px;
    font-family: inherit;
    padding: 13px 14px;
    cursor: pointer;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23cc7a00' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.selector-wrap select:focus {
    outline: none;
    border-color: var(--orange-d);
    box-shadow: 0 0 0 3px rgba(255, 153, 0, 0.2);
}

/* ----- Enlace de continuar ----- */
.continue-link {
    display: inline-block;
    margin-top: 28px;
    color: var(--blue);
    font-size: 14px;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.15s ease;
}

.continue-link:hover {
    color: var(--blue-h);
    text-decoration: underline;
}

/* ----- Footer ----- */
.footer {
    text-align: center;
    margin-top: 40px;
    padding: 24px;
    color: var(--text-muted);
    font-size: 13px;
}

/* ----- Responsive ----- */
@media (max-width: 480px) {
    .hero { padding: 40px 20px 70px; }
    .hero-title { font-size: 24px; }
    .hero-subtitle { font-size: 15px; }
    .container { padding: 0 16px; margin-top: -40px; }
    .card { padding: 28px 20px; }
    .card-title { font-size: 20px; }
    .asin-form input[type="text"] { font-size: 16px; }
}