/* 
 * RIOM Proposals - Estilos Corporativos
 * MVP v1.0 - Inspirado en AWS, Deloitte, Gartner
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --color-brand-primary: #1A365D;   /* Azul Institucional */
    --color-brand-secondary: #0F172A; /* Slate muy oscuro para títulos */
    --color-cta: #D43B0C;             /* Naranja Principal */
    --color-cta-hover: #b5310a;       /* Naranja Hover */
    --color-text-main: #1F2937;       /* Gris Principal */
    --color-text-sub: #5B6675;        /* Gris Secundario */
    --color-bg-body: #F7F8FA;         /* Fondo General */
    --color-bg-card: #FFFFFF;         /* Fondo de Tarjetas */
    --color-border: #E2E8F0;          /* Bordes de Separación */
    --color-focus: #3B82F6;           /* Azul de Enfoque */
    --color-success: #10B981;         /* Verde éxito */
    --color-error: #EF4444;           /* Rojo error */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-bg-body);
    color: var(--color-text-main);
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* NAVBAR / HEADER CORPORATIVO */
header {
    background-color: var(--color-brand-primary);
    color: #FFFFFF;
    padding: 1.25rem 2rem;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo-link {
    text-decoration: none;
    color: #FFFFFF;
}

.logo {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.logo span {
    color: var(--color-cta);
}

.logo-sub {
    font-size: 0.65rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #E2E8F0;
    font-weight: 600;
    display: block;
    margin-top: -0.2rem;
}

.logo-img {
    height: 40px;
    width: auto;
    max-height: 40px;
    display: block;
    transition: var(--transition-smooth);
}

.logo-img:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: #E2E8F0;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: #FFFFFF;
    background-color: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
    color: #FFFFFF;
    background-color: rgba(255, 255, 255, 0.12);
    font-weight: 600;
}

/* CONTENEDOR PRINCIPAL */
main {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

/* HISTORIAL - AJUSTE ANCHO */
main.wide {
    max-width: 1200px;
}

/* TARJETAS PREMIUM */
.card {
    background-color: var(--color-bg-card);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    overflow: hidden;
}

.card-title {
    font-family: 'Outfit', sans-serif;
    color: var(--color-brand-primary);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-subtitle {
    color: var(--color-text-sub);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

/* SECCIONES DEL FORMULARIO */
fieldset {
    border: none;
    margin-bottom: 2rem;
}

legend {
    font-family: 'Outfit', sans-serif;
    color: var(--color-brand-primary);
    font-size: 1.15rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    width: 100%;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.5rem;
}

/* FORM ELEMENTOS */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.25rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-main);
    letter-spacing: 0.2px;
}

label .required {
    color: var(--color-error);
    margin-left: 2px;
}

input[type="text"],
input[type="email"],
select,
textarea {
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--color-text-main);
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background-color: #FAFAFA;
    transition: var(--transition-smooth);
    width: 100%;
}

input[type="text"]:focus,
input[type="email"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-focus);
    background-color: #FFFFFF;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.form-helper {
    font-size: 0.75rem;
    color: var(--color-text-sub);
    margin-top: 0.25rem;
}

/* UPLOAD AREA STYLISH */
.file-upload-wrapper {
    position: relative;
    border: 2px dashed var(--color-border);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    background-color: #FAFAFA;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.file-upload-wrapper:hover {
    border-color: var(--color-cta);
    background-color: rgba(198, 58, 11, 0.02);
}

.file-upload-wrapper.dragover {
    border-color: var(--color-focus);
    background-color: rgba(59, 130, 246, 0.05);
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload-icon {
    font-size: 2.2rem;
    color: var(--color-text-sub);
    transition: var(--transition-smooth);
}

.file-upload-wrapper:hover .file-upload-icon {
    color: var(--color-cta);
    transform: translateY(-2px);
}

.file-upload-text {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--color-text-main);
}

.file-upload-text span {
    color: var(--color-cta);
    text-decoration: underline;
}

.file-name-display {
    margin-top: 0.5rem;
    font-weight: 600;
    color: var(--color-brand-primary);
    font-size: 0.9rem;
    word-break: break-all;
    display: none;
    padding: 0.4rem 1rem;
    background-color: rgba(26, 54, 93, 0.05);
    border-radius: 6px;
    align-items: center;
    gap: 0.5rem;
}

/* BOTONES PREMIUM */
.btn {
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    color: #FFFFFF;
    background-color: var(--color-cta);
    border: none;
    border-radius: 8px;
    padding: 0.9rem 2rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: 0 4px 6px rgba(198, 58, 11, 0.15);
    text-decoration: none;
}

.btn:hover {
    background-color: var(--color-cta-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 12px rgba(198, 58, 11, 0.25);
}

.btn:active {
    transform: translateY(1px);
}

.btn-secondary {
    background-color: #FFFFFF;
    color: var(--color-text-main);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: #F8FAFC;
    color: var(--color-brand-primary);
    border-color: var(--color-text-sub);
    box-shadow: var(--shadow-md);
    transform: none;
}

.btn-group {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* ALERTAS FLOTANTES Y MENSAJES */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    font-weight: 500;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    animation: slideInDown 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-sm);
}

.alert-success {
    background-color: #ECFDF5;
    border: 1px solid #A7F3D0;
    color: #065F46;
}

.alert-error {
    background-color: #FEF2F2;
    border: 1px solid #FCA5A5;
    color: #991B1B;
}

.alert-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    font-size: 1.1rem;
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.alert-close:hover {
    opacity: 1;
}

/* ANIMACIONES */
@keyframes slideInDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* LOADER / SPINNER */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.loader-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-cta);
    animation: spin 1s linear infinite;
    margin-bottom: 1.5rem;
}

.loader-text {
    color: #FFFFFF;
    font-weight: 700;
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    letter-spacing: 0.5px;
}

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

/* HISTORIAL - VISTA DE TABLA */
.table-wrapper {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background-color: #FFFFFF;
}

table.history-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

table.history-table th {
    background-color: #F8FAFC;
    color: var(--color-brand-primary);
    font-weight: 700;
    padding: 1rem 1.25rem;
    border-bottom: 2px solid var(--color-border);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

table.history-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-main);
    vertical-align: middle;
}

table.history-table tbody tr {
    transition: var(--transition-smooth);
}

table.history-table tbody tr:hover {
    background-color: #F8FAFC;
}

/* BADGES DE ESTADO */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.6rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2px;
}

.badge-success {
    background-color: #D1FAE5;
    color: #065F46;
}

.badge-failed {
    background-color: #FEE2E2;
    color: #991B1B;
}

/* LINK DE DESCARGA PDF */
.pdf-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-cta);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.pdf-link:hover {
    color: var(--color-cta-hover);
    text-decoration: underline;
}

.pdf-icon {
    font-size: 1.1rem;
}

/* VACÍO */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-sub);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--color-border);
}

.empty-state h3 {
    color: var(--color-brand-primary);
    margin-bottom: 0.5rem;
    font-family: 'Outfit', sans-serif;
}

/* FOOTER GENERAL DE PÁGINA */
.main-footer {
    background-color: #FFFFFF;
    border-top: 1px solid var(--color-border);
    padding: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-sub);
    margin-top: auto;
}

.main-footer strong {
    color: var(--color-brand-primary);
}