@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

:root {
    /* Colores corporativos */
    --color-primary: #f6a228;
    --color-primary-dark: #e09520;
    --color-primary-light: #fbb544;
    --color-text: #393235;
    --color-text-light: #5a5456;
    --color-accent: #9d9d9c;

    /* Colores de estado */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Fondos */
    --color-background: #f8f8f8;
    --color-surface: #ffffff;
    --color-border: #e5e5e5;

    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(57, 50, 53, 0.05);
    --shadow-md: 0 4px 12px rgba(57, 50, 53, 0.08);
    --shadow-lg: 0 8px 24px rgba(57, 50, 53, 0.12);

    /* Bordes */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transiciones */
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family:
        'DM Sans',
        -apple-system,
        BlinkMacSystemFont,
        'Segoe UI',
        sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    /* Respeta el safe-area del notch / bottom bar en iOS/Android. */
    min-height: 100dvh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

.page-container {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
}

.main-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem clamp(1rem, 4vw, 1.5rem);
    padding-top: calc(0.75rem + env(safe-area-inset-top));
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    flex-shrink: 0;
}

.logo img {
    height: 40px;
    width: auto;
}

.header-title {
    font-size: clamp(1.25rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    flex: 1;
    font-family: 'Montserrat', sans-serif;
    line-height: 1.2;
}

.header-spacer {
    width: 80px;
    flex-shrink: 0;
}

main {
    flex: 1;
    padding: clamp(1rem, 4vw, 2rem) clamp(0.75rem, 4vw, 1.5rem);
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: clamp(1.25rem, 4vw, 2rem);
    border: 1px solid var(--color-border);
    animation: slideInUp 0.4s ease-out;
}

.card-header {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #f6a228 0%, #e09520 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: 0 12px 40px rgba(246, 162, 40, 0.25);
}

.eyebrow {
    font-size: 0.8125rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0.1rem 0;
    color: var(--color-text);
}

.subtitle {
    color: var(--color-text-light);
}

.validator-form {
    display: grid;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group.hidden {
    display: none;
}

label {
    font-weight: 500;
    color: var(--color-text);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    /* 16px mínimo evita el auto-zoom de iOS al enfocar un input. */
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #ffffff;
    color: var(--color-text);
    transition:
        border-color var(--transition),
        box-shadow var(--transition);
    /* En iOS los inputs date aparecen con tipografía minúscula; lo evitamos. */
    appearance: none;
    -webkit-appearance: none;
    min-height: 48px;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(246, 162, 40, 0.15);
}

.form-input::placeholder {
    color: var(--color-accent);
}

.hint {
    font-size: 0.8125rem;
    color: var(--color-accent);
}

.invalid-note {
    margin-top: 0.85rem;
    color: #7c2d12;
    font-weight: 500;
    line-height: 1.55;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.25rem;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    min-height: 48px;
    /* Evita el highlight azul al tocar en móvil. */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition:
        transform var(--transition),
        box-shadow var(--transition),
        opacity var(--transition);
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.7;
    box-shadow: none;
}

.btn--primary {
    width: 100%;
    background: linear-gradient(135deg, #f6a228 0%, #e09520 100%);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(246, 162, 40, 0.3);
}

.btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(246, 162, 40, 0.4);
}

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

.result {
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.result.hidden {
    display: none;
}

.result ul {
    list-style-position: inside;
    margin-top: 0.5rem;
    display: grid;
    gap: 0.35rem;
}

.success {
    border-color: #22c55e;
    background: #f0fdf4;
    color: #166534;
}

.error {
    border-color: #ef4444;
    background: #fef2f2;
    color: #991b1b;
}

.loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    font-weight: 600;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid #e5e5e5;
    border-top-color: #f6a228;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.main-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 1.25rem 1rem;
    padding-bottom: calc(1.25rem + env(safe-area-inset-bottom));
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ==========================================================================
   Móvil portrait (≤ 640px)
   ========================================================================== */
@media (max-width: 640px) {
    .main-header {
        padding: 0.5rem 0.9rem;
        padding-top: calc(0.5rem + env(safe-area-inset-top));
    }

    .header-content {
        flex-wrap: nowrap;
        gap: 0.6rem;
        justify-content: flex-start;
        align-items: center;
    }

    .logo img {
        height: 28px;
    }

    .header-title {
        order: 0;
        width: auto;
        flex: 1;
        font-size: 1.05rem;
        text-align: left;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .header-spacer {
        display: none;
    }

    .card-header {
        grid-template-columns: auto 1fr;
        gap: 0.75rem;
        margin-bottom: 1.1rem;
    }

    .card-icon {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    h2 {
        font-size: 1.2rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .validator-form {
        gap: 0.85rem;
    }
}

/* Pantallas ultra estrechas (iPhone SE, Galaxy Fold cerrado, etc.). */
@media (max-width: 360px) {
    .main-header {
        padding: 0.4rem 0.6rem;
        padding-top: calc(0.4rem + env(safe-area-inset-top));
    }

    .logo img {
        height: 24px;
    }

    .header-title {
        font-size: 0.95rem;
    }

    .card-header {
        grid-template-columns: 1fr;
        text-align: center;
        justify-items: center;
    }

    .form-input {
        padding: 0.75rem 0.85rem;
    }
}

/* ==========================================================================
   Móvil landscape (alto reducido): compactar header/footer y reducir hueco
   ========================================================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .main-header {
        position: static;
        padding: 0.3rem 0.9rem;
        padding-top: calc(0.3rem + env(safe-area-inset-top));
    }

    .header-content {
        flex-wrap: nowrap;
        gap: 0.6rem;
    }

    .logo img {
        height: 24px;
    }

    .header-title {
        font-size: 0.95rem;
        order: 0;
        width: auto;
        flex: 1;
        text-align: left;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .header-spacer {
        display: none;
    }

    main {
        padding: 0.75rem 1rem;
    }

    .card {
        padding: 1rem 1.25rem;
    }

    .card-header {
        margin-bottom: 0.75rem;
    }

    .card-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .validator-form {
        /* En landscape aprovechamos el ancho: 2 columnas para los campos. */
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem 1rem;
    }

    .form-group:last-of-type,
    .btn--primary,
    .result {
        grid-column: 1 / -1;
    }

    .form-input {
        padding: 0.6rem 0.85rem;
        min-height: 42px;
    }

    .btn {
        min-height: 42px;
        padding: 0.65rem 1rem;
    }

    .main-footer {
        padding: 0.75rem 1rem;
        font-size: 0.8rem;
    }
}

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

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