/* ========================================
   VARIABLES Y RESET
   ======================================== */
:root {
    --color-bg: #f8f9fa;
    --color-primary: #2c3e50;
    --color-accent: #3498db;
    --color-accent-dark: #2980b9;
    --color-text: #2c3e50;
    --color-text-light: #7f8c8d;
    --color-border: #ecf0f1;
    --color-success: #27ae60;
    --color-danger: #e74c3c;
    
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --spacing-unit: 8px;
    --border-radius: 4px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* ========================================
   PÁGINA DE LOGIN
   ======================================== */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-unit) * 2;
}

.login-box {
    background: white;
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 4);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 4);
}

.login-header h1 {
    font-size: 3rem;
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.login-header h2 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.login-header p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.form-group label {
    display: block;
    margin-bottom: calc(var(--spacing-unit) * 0.75);
    font-weight: 600;
    color: var(--color-text);
}

.form-control {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 1.5);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-family: var(--font-family);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.btn-login {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4);
}

.error-message {
    background-color: #ffe5e5;
    color: var(--color-danger);
    padding: calc(var(--spacing-unit) * 1.25);
    border-radius: var(--border-radius);
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    font-size: 0.9rem;
    border-left: 4px solid var(--color-danger);
}

.login-footer {
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    padding-top: calc(var(--spacing-unit) * 1.5);
}

.login-footer p {
    margin: calc(var(--spacing-unit) * 0.5) 0;
}

/* ========================================
   NAVBAR (DASHBOARD)
   ======================================== */

.navbar {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-dark) 100%);
    color: white;
    padding: calc(var(--spacing-unit) * 2) 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-left {
    flex: 1;
}

.navbar-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.navbar-subtitle {
    font-size: 0.85rem;
    opacity: 0.9;
    margin: 0;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 2);
}

.user-info {
    font-size: 0.95rem;
    opacity: 0.95;
}

.btn-logout {
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    text-decoration: none;
}

.btn-logout:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: white;
}

/* ========================================
   CONTAINER Y LAYOUT
   ======================================== */

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: calc(var(--spacing-unit) * 3);
}

.search-section {
    margin-bottom: calc(var(--spacing-unit) * 5);
}

.search-wrapper {
    display: flex;
    gap: calc(var(--spacing-unit) * 1);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.search-input {
    flex: 1;
    min-width: 250px;
    max-width: 500px;
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-family);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.doc-count {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

#docCount {
    font-weight: 700;
    color: var(--color-accent);
}

/* ========================================
   BOTONES
   ======================================== */

.btn-search,
.btn-google,
.btn-copy {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 2);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
}

.btn-search {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    color: white;
}

.btn-search:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-google {
    background: white;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-google:hover {
    background: var(--color-bg);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-copy {
    background: var(--color-success);
    color: white;
    font-size: 0.85rem;
    padding: calc(var(--spacing-unit) * 0.75) calc(var(--spacing-unit) * 1.5);
}

.btn-copy:hover {
    background: #229954;
    transform: translateY(-1px);
}

/* ========================================
   GRID DE CONTENIDO
   ======================================== */

.content-grid {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: calc(var(--spacing-unit) * 4);
    align-items: start;
}

.results-section {
    grid-column: 1;
}

.sidebar {
    grid-column: 2;
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 3);
}

@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        grid-column: 1;
        flex-direction: row;
    }
    
    .panel {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .container {
        padding: calc(var(--spacing-unit) * 2);
    }
    
    .sidebar {
        flex-direction: column;
    }
    
    .search-wrapper {
        flex-direction: column;
    }
    
    .search-input {
        max-width: 100%;
    }
}

/* ========================================
   SECCIONES Y PANELES
   ======================================== */

.section-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: calc(var(--spacing-unit) * 1);
    display: inline-block;
}

.panel {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 2);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.panel-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 1.5);
    color: var(--color-text);
}

.panel-content {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 1);
}

/* ========================================
   RESULTADOS
   ======================================== */

.results-container {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}

.result-item {
    background: white;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--border-radius);
    padding: calc(var(--spacing-unit) * 2);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.result-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-left-color: var(--color-accent-dark);
}

.result-item.error {
    border-left-color: var(--color-danger);
    background: #fff5f5;
}

.result-header {
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.result-document {
    font-weight: 600;
    color: var(--color-accent);
    font-size: 0.95rem;
}

.result-meta {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: calc(var(--spacing-unit) * 0.5);
}

.result-snippet {
    background: var(--color-bg);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius);
    margin: calc(var(--spacing-unit) * 1) 0;
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-light);
}

.result-actions {
    display: flex;
    gap: calc(var(--spacing-unit) * 1);
    margin-top: calc(var(--spacing-unit) * 1);
}

/* ========================================
   HISTORIAL Y MÁS BUSCADOS
   ======================================== */

.history-item,
.top-item {
    background: var(--color-bg);
    padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    word-break: break-word;
}

.history-item:hover,
.top-item:hover {
    background: var(--color-accent);
    color: white;
    transform: translateX(4px);
}

.top-count {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-top: calc(var(--spacing-unit) * 0.5);
}

.top-item:hover .top-count {
    opacity: 1;
}

/* ========================================
   ESTADOS Y MENSAJES
   ======================================== */

.empty-text {
    color: var(--color-text-light);
    font-style: italic;
    text-align: center;
    padding: calc(var(--spacing-unit) * 2);
    background: var(--color-bg);
    border-radius: var(--border-radius);
}

.loading {
    text-align: center;
    padding: calc(var(--spacing-unit) * 3);
    color: var(--color-text-light);
}

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========================================
   FOOTER
   ======================================== */

.footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 3);
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    margin-top: calc(var(--spacing-unit) * 5);
    font-size: 0.9rem;
}

/* ========================================
   SCROLL
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-light);
}

/* ========================================
   ACCESIBILIDAD
   ======================================== */

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}