/* =========================================================
   FluidaLab 1.1
   Simulador hidráulico interactivo
   ========================================================= */


/* -------------------------
   Variables
   ------------------------- */

:root {
    --color-primary: #00758a;
    --color-primary-dark: #005f70;

    --color-background: #f4f7f9;
    --color-panel: #ffffff;
    --color-panel-soft: #f8fbfc;
    --color-result: #edf3f6;

    --color-text: #102a33;
    --color-muted: #526b75;
    --color-border: #cddde3;

    --color-pipe-wall: #425a65;
    --color-pipe-fluid: #d8edf5;
    --color-flow: #0878b5;
    --color-centerline: #8aa3ad;

    --color-error: #b42318;

    --border-radius: 10px;
    --transition-speed: 150ms;
}


/* -------------------------
   Encabezado de la página
   ------------------------- */

header h1 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    font-size: clamp(2rem, 5vw, 2.7rem);
}

header p {
    max-width: 850px;
    margin-top: 0;
    margin-bottom: 0;
    color: var(--color-text);
    line-height: 1.55;
}


/* -------------------------
   Distribución principal
   ------------------------- */

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    gap: 1.5rem;
    align-items: start;
    margin-top: 2rem;
}

.panel {
    box-sizing: border-box;
    padding: 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-panel);
}

.panel h2 {
    margin-top: 0;
    margin-bottom: 1.25rem;
    color: #000000;
    font-size: 1.5rem;
}


/* -------------------------
   Formulario
   ------------------------- */

form {
    width: 100%;
}

.field {
    margin-bottom: 1.35rem;
}

.field label {
    display: block;
    margin-bottom: 0.45rem;
    color: #000000;
    font-weight: 700;
}

.field input,
.field select,
.field textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 7px;
    background-color: #ffffff;
    color: var(--color-text);
    font: inherit;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--color-primary);
    outline: 2px solid rgba(0, 117, 138, 0.2);
    outline-offset: 1px;
}


/* -------------------------
   Slider de diámetro
   ------------------------- */

.field input[type="range"] {
    width: 100%;
    min-height: 36px;
    padding: 0;
    border: none;
    outline: none;
    cursor: pointer;
    accent-color: #0d78f2;
}

.field input[type="range"]:focus {
    outline: 2px solid rgba(0, 117, 138, 0.25);
    outline-offset: 4px;
}

.slider-information {
    margin-top: 0.65rem;
}

.slider-information p {
    margin: 0 0 0.35rem;
    color: var(--color-muted);
}

.slider-information strong {
    color: var(--color-text);
}

.slider-information small {
    display: block;
    color: var(--color-muted);
    line-height: 1.45;
}


/* -------------------------
   Vista longitudinal
   ------------------------- */

.pipe-visualization {
    margin-bottom: 1.5rem;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-panel-soft);
}

.pipe-visualization h3 {
    margin: 0 0 1rem;
    color: var(--color-text);
    font-size: 1.1rem;
    text-align: center;
}

.pipe-canvas-container {
    width: 100%;
    overflow: hidden;
}

#pipe-canvas {
    display: block;
    width: 100%;
    height: auto;
    min-height: 220px;
    box-sizing: border-box;
    border: 1px solid #d6e2e8;
    border-radius: 8px;
    background-color: #eef6f8;
}

.pipe-information {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem 1rem;
    margin-top: 0.75rem;
}

.pipe-information p {
    margin: 0;
    color: var(--color-muted);
}

.pipe-information strong {
    color: var(--color-text);
}

.pipe-visualization small {
    display: block;
    margin-top: 0.5rem;
    color: var(--color-muted);
    line-height: 1.4;
}


/* -------------------------
   Botón principal
   ------------------------- */

button[type="submit"] {
    width: 100%;
    padding: 0.85rem 1rem;
    border: none;
    border-radius: 7px;
    background-color: var(--color-primary);
    color: #ffffff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;

    transition:
        background-color var(--transition-speed) ease,
        transform var(--transition-speed) ease;
}

button[type="submit"]:hover {
    background-color: var(--color-primary-dark);
}

button[type="submit"]:active {
    transform: translateY(1px);
}

button[type="submit"]:focus-visible {
    outline: 3px solid rgba(0, 117, 138, 0.3);
    outline-offset: 3px;
}


/* -------------------------
   Resultados instantáneos
   ------------------------- */

.results {
    display: grid;
    gap: 0.75rem;
}

.result-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1rem;
    align-items: center;

    min-height: 48px;
    padding: 0.8rem 0.9rem;

    border-radius: 8px;
    background-color: var(--color-result);
}

.result-label {
    color: var(--color-text);
    line-height: 1.35;
}

.result-value {
    color: #000000;
    font-weight: 700;
    text-align: right;
    white-space: nowrap;
}

#flow-regime-result {
    min-width: 90px;
}


/* -------------------------
   Mensajes de error
   ------------------------- */

.error-list {
    margin: 0.5rem 0 0;
    padding-left: 1.25rem;
    color: var(--color-error);
}

.error-list li {
    margin-bottom: 0.25rem;
}


/* -------------------------
   Adaptación para tablet
   ------------------------- */

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
    }

    #pipe-canvas {
        min-height: 200px;
    }
}


/* -------------------------
   Adaptación para celular
   ------------------------- */

@media (max-width: 600px) {
    .layout {
        gap: 1rem;
        margin-top: 1.25rem;
    }

    .panel {
        padding: 1rem;
    }

    .panel h2 {
        font-size: 1.3rem;
    }

    #pipe-canvas {
        min-height: 170px;
    }

    .pipe-information {
        display: grid;
        grid-template-columns: 1fr;
    }

    .result-row {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }

    .result-value {
        text-align: left;
    }
}