/* ============================================
   Sistema de Consulta de Certificados
   S&P Generación - Estilos principales
   ============================================ */

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colores */
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;
    --color-primary: #1a1a2e;
    --color-primary-hover: #2d2d4a;
    --color-accent: #4ade80;
    --color-accent-soft: #f0fdf4;
    --color-danger-soft: #fef2f2;
    --color-danger-text: #991b1b;

    /* Tipografía */
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Space Mono', 'Courier New', monospace;

    /* Espaciado */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Bordes */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Sombras */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-input-focus: 0 0 0 3px rgba(74, 222, 128, 0.2);

    /* Transiciones */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

/* --- App Layout --- */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main {
    flex: 1;
}

/* --- Header --- */
.header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.92);
}

.header__container {
    max-width: 720px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
}

.header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header__logo {
    flex-shrink: 0;
}

.header__title {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
    line-height: 1.2;
}

.header__subtitle {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    font-weight: 400;
    line-height: 1.3;
}

/* --- Hero Section --- */
.hero {
    padding: var(--space-3xl) var(--space-xl) var(--space-2xl);
}

.hero__container {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.hero__badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
    animation: fadeInDown 0.6s ease;
}

.hero__title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    animation: fadeInDown 0.6s ease 0.1s both;
}

.hero__description {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 480px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.6;
    animation: fadeInDown 0.6s ease 0.2s both;
}

/* --- Search --- */
.search {
    max-width: 520px;
    margin: 0 auto;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.search__input-group {
    display: flex;
    align-items: center;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xs);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.search__input-group:focus-within {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-input-focus);
}

.search__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-sm) 0 var(--space-md);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.search__input {
    flex: 1;
    border: none;
    outline: none;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    padding: var(--space-md) var(--space-sm);
    background: transparent;
    min-width: 0;
}

.search__input::placeholder {
    color: var(--color-text-muted);
}

.search__button {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast);
    white-space: nowrap;
}

.search__button:hover {
    background: var(--color-primary-hover);
}

.search__button:active {
    transform: scale(0.97);
}

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

.search__hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    font-family: var(--font-mono);
}

/* Spinner */
.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* --- Results Section --- */
.results {
    padding: 0 var(--space-xl) var(--space-3xl);
    animation: fadeInUp 0.4s ease;
}

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

.results__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.results__title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.results__count {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
}

/* --- Result Card --- */
.results__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.result-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    animation: fadeInUp 0.4s ease both;
}

.result-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.result-card__info {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    min-width: 0;
    flex: 1;
}

.result-card__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--color-accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-card__icon svg {
    color: #16a34a;
}

.result-card__details {
    min-width: 0;
}

.result-card__company {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-card__meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.result-card__meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.result-card__year {
    background: var(--color-bg);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    font-weight: 700;
}

.result-card__download {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-accent-soft);
    color: #16a34a;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.result-card__download:hover {
    background: #dcfce7;
    border-color: #86efac;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.result-card__download:active {
    transform: translateY(0);
}

.result-card__download svg {
    flex-shrink: 0;
}

/* --- Empty State --- */
.results__empty {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
}

.results__empty-icon {
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.results__empty-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.results__empty-text {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* --- Error Toast --- */
.error-toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-danger-soft);
    color: var(--color-danger-text);
    border: 1px solid #fecaca;
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: transform var(--transition-base);
    max-width: 90vw;
    text-align: center;
}

.error-toast--visible {
    transform: translateX(-50%) translateY(0);
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-xl);
    text-align: center;
}

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

.footer p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --- Animations --- */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .hero {
        padding: var(--space-2xl) var(--space-md) var(--space-xl);
    }

    .hero__description {
        font-size: 0.95rem;
    }

    .search__button {
        padding: var(--space-md) var(--space-md);
    }

    .search__button-text {
        display: none;
    }

    .search__button::after {
        content: '→';
        font-size: 1.2rem;
    }

    .results {
        padding: 0 var(--space-md) var(--space-2xl);
    }

    .result-card {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-md);
        padding: var(--space-md);
    }

    .result-card__download {
        justify-content: center;
        padding: var(--space-md);
    }

    .results__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
}