/* ============================================================
   VARIABLES Y RESET
============================================================ */
:root {
    --verde:      #00a09b;
    --verde-dk:   #007d79;
    --verde-lt:   #e6f7f7;
    --verde-mid:  #b3e6e4;
    --texto:      #434549;
    --texto-sec:  #9498a1;
    --borde:      #e4e6ea;
    --borde-hover:#c8cbcf;
    --fondo:      #f4f5f7;
    --blanco:     #ffffff;
    --sombra:     0 2px 12px rgba(67,69,73,0.07);
    --sombra-act: 0 4px 20px rgba(0,160,155,0.13);
    --trans:      all 0.25s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Exo 2', sans-serif;
    background: var(--fondo);
    color: var(--texto);
    min-height: 100vh;
    line-height: 1.6;
}

/* ============================================================
   HEADER
============================================================ */
.site-header {
    background: var(--blanco);
    border-bottom: 1px solid var(--borde);
    padding: 2rem 2rem 1.75rem;
    position: relative;
}
.site-header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: var(--verde);
}
.header-inner {
    max-width: 760px;
    margin: 0 auto;
}
.header-tag {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--verde);
    border-left: 3px solid var(--verde);
    padding: 0 0 0 0.6rem;
    margin-bottom: 0.75rem;
}
.site-header h1 {
    font-family: 'Exo 2', sans-serif;
    font-size: clamp(1.5rem, 3vw, 2.1rem);
    color: var(--texto);
    font-weight: 600;
    line-height: 1.25;
    margin-bottom: 0.4rem;
    letter-spacing: -0.01em;
}
.site-header p {
    font-size: 1rem;
    color: var(--texto-sec);
    font-weight: 300;
}

/* ============================================================
   PROGRESO GLOBAL
============================================================ */
.progress-bar-wrap {
    max-width: 760px;
    margin: 0 auto;
    padding: 0;
}
.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--texto-sec);
    font-weight: 500;
    margin-bottom: 0.4rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.progress-info span:first-child { color: var(--verde-dk); font-weight: 600; }
.progress-track {
    height: 3px;
    background: var(--borde);
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: var(--verde);
    transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
    width: 0%;
}

/* ============================================================
   CONTENEDOR
============================================================ */
.main-wrap {
    max-width: 760px;
    margin: 0 auto;
    padding: 2rem 1.5rem 5rem;
}

/* ============================================================
   SEPARADOR DE SECCIÓN
============================================================ */
.section-divider {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin: 2rem 0 0.875rem;
}
.section-divider:first-child { margin-top: 0; }
.section-pill {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--verde-dk);
    border-left: 2px solid var(--verde);
    padding-left: 0.6rem;
    white-space: nowrap;
}
.section-line {
    flex: 1;
    height: 1px;
    background: var(--borde);
}

/* ============================================================
   ACORDEÓN
============================================================ */
.accordion {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.acc-item {
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-left: 3px solid transparent;
    overflow: hidden;
    transition: var(--trans);
}
.acc-item.is-answered {
    border-left-color: var(--verde-mid);
}
.acc-item.is-active {
    border-color: var(--borde);
    border-left-color: var(--verde);
    box-shadow: var(--sombra-act);
}
.acc-item.is-locked {
    opacity: 0.38;
    pointer-events: none;
}

/* Cabecera */
.acc-header {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem 1.125rem;
    cursor: pointer;
    user-select: none;
    transition: var(--trans);
}
.acc-item.is-answered:not(.is-active) .acc-header:hover {
    background: var(--verde-lt);
}
.acc-item.is-active .acc-header { cursor: default; }

.acc-num {
    width: 30px;
    height: 30px;
    background: var(--fondo);
    color: var(--texto-sec);
    font-size: 0.85rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--trans);
    border: 1px solid var(--borde);
}
.acc-item.is-answered .acc-num {
    background: var(--verde);
    color: #fff;
    border-color: var(--verde);
}
.acc-item.is-active .acc-num {
    background: var(--verde-lt);
    color: var(--verde-dk);
    border-color: var(--verde);
}

.acc-titles { flex: 1; min-width: 0; }

.acc-question {
    font-size: 1.05rem;
    color: var(--texto);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.35;
}
.acc-item.is-active .acc-question {
    white-space: normal;
    font-size: 1.1rem;
    font-weight: 600;
}
.acc-obligatoria {
    display: inline-block;
    color: var(--verde);
    margin-left: 2px;
}

.acc-answer-preview {
    font-size: 0.9rem;
    color: var(--verde-dk);
    font-weight: 500;
    margin-top: 0.15rem;
    display: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: 0.01em;
}
.acc-item.is-answered:not(.is-active) .acc-answer-preview { display: block; }

.acc-chevron {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--texto-sec);
    transition: transform 0.3s ease;
}
.acc-item.is-active .acc-chevron,
.acc-item.is-locked .acc-chevron { display: none; }
.acc-item:not(.is-answered):not(.is-active) .acc-chevron { display: none; }

/* Cuerpo */
.acc-body {
    display: none;
    padding: 0 1.125rem 1.125rem;
}
.acc-item.is-active .acc-body {
    display: block;
    animation: fadeDown 0.22s ease forwards;
}

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-5px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   OPCIONES DE RESPUESTA
============================================================ */
.options-list {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-top: 0.25rem;
}

.option-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--borde);
    cursor: pointer;
    transition: var(--trans);
    font-size: 1rem;
    color: var(--texto);
    background: var(--fondo);
    line-height: 1.35;
    position: relative;
}
.option-label:hover {
    border-color: var(--verde);
    background: var(--verde-lt);
    color: var(--verde-dk);
}

/* Controles personalizados */
.custom-radio,
.custom-check {
    width: 16px;
    height: 16px;
    border: 2px solid var(--borde-hover);
    flex-shrink: 0;
    transition: var(--trans);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.custom-radio { border-radius: 50%; }
.custom-check  { border-radius: 0; }

.option-label:has(input:checked) .custom-radio {
    border-color: var(--verde);
    background: var(--verde);
}
.option-label:has(input:checked) .custom-radio::after {
    content: '';
    width: 5px;
    height: 5px;
    background: #fff;
    border-radius: 50%;
}
.option-label:has(input:checked) .custom-check {
    border-color: var(--verde);
    background: var(--verde);
}
.option-label:has(input:checked) .custom-check::after {
    content: '';
    width: 9px;
    height: 5px;
    border-left: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(-45deg) translateY(-1px);
}

.option-label:has(input:checked) {
    border-color: var(--verde);
    background: var(--verde-lt);
    color: var(--verde-dk);
    font-weight: 600;
}

.option-label input[type="radio"],
.option-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

/* Checkbox + input extra */
.option-extra-input {
    display: none;
    margin-top: 0.35rem;
    margin-left: 2.25rem;
}
.option-label:has(input[type="checkbox"]:checked) ~ .option-extra-input,
.option-extra-input.visible { display: block; }
.extra-text-input {
    width: 100%;
    border: 1px solid var(--verde-mid);
    border-left: 3px solid var(--verde);
    padding: 0.4rem 0.75rem;
    font-family: 'Exo 2', sans-serif;
    font-size: 1rem;
    color: var(--texto);
    background: var(--blanco);
    outline: none;
    transition: border-color 0.2s;
}
.extra-text-input:focus { border-color: var(--verde); }
.extra-text-input::placeholder { color: var(--texto-sec); }

/* Input / Textarea libre */
.field-input,
.field-textarea {
    width: 100%;
    border: 1px solid var(--borde);
    border-left: 3px solid var(--borde);
    padding: 0.6rem 0.875rem;
    font-family: 'Exo 2', sans-serif;
    font-size: 1rem;
    color: var(--texto);
    background: var(--fondo);
    outline: none;
    transition: border-color 0.2s;
    margin-top: 0.25rem;
}
.field-input:focus,
.field-textarea:focus {
    border-color: var(--borde);
    border-left-color: var(--verde);
    background: var(--blanco);
}
.field-input::placeholder,
.field-textarea::placeholder { color: var(--texto-sec); }
.field-textarea { resize: vertical; min-height: 90px; }

/* Escala likert 1-5 */
.scale-options {
    display: flex;
    gap: 0.4rem;
    margin-top: 0.25rem;
    flex-wrap: wrap;
}
.scale-label {
    flex: 1;
    min-width: 44px;
    max-width: 68px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    padding: 0.65rem 0.5rem;
    border: 1px solid var(--borde);
    cursor: pointer;
    transition: var(--trans);
    background: var(--fondo);
}
.scale-label:hover {
    border-color: var(--verde);
    background: var(--verde-lt);
}
.scale-label input { position: absolute; opacity: 0; width: 0; height: 0; }
.scale-num {
    font-size: 1rem;
    font-weight: 700;
    color: var(--texto-sec);
    transition: color 0.2s;
}
.scale-bar {
    width: 100%;
    height: 3px;
    background: var(--borde);
    transition: background 0.2s;
}
.scale-label:has(input:checked) {
    border-color: var(--verde);
    background: var(--verde-lt);
}
.scale-label:has(input:checked) .scale-num { color: var(--verde-dk); font-weight: 700; }
.scale-label:has(input:checked) .scale-bar  { background: var(--verde); }

/* Botón continuar */
.btn-continuar {
    display: none;
    margin-top: 0.875rem;
    padding: 0.65rem 1.75rem;
    background: var(--verde);
    color: #fff;
    border: none;
    font-family: 'Exo 2', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--trans);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.btn-continuar:hover { background: var(--verde-dk); }
.btn-continuar.visible { display: inline-block; }

/* ============================================================
   MENSAJE FINAL
============================================================ */
#mensaje-final {
    display: none;
    text-align: center;
    padding: 3rem 1.5rem;
    background: var(--blanco);
    border: 1px solid var(--borde);
    border-top: 3px solid var(--verde);
    box-shadow: var(--sombra-act);
    animation: fadeDown 0.35s ease forwards;
    margin-top: 1rem;
}
#mensaje-final.visible { display: block; }
.final-icon {
    width: 52px;
    height: 52px;
    background: var(--verde-lt);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    border-left: 3px solid var(--verde);
}
.final-icon svg { width: 26px; height: 26px; color: var(--verde); }
#mensaje-final h2 {
    font-family: 'Exo 2', sans-serif;
    font-size: 1.5rem;
    color: var(--texto);
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}
#mensaje-final p {
    font-size: 1rem;
    color: var(--texto-sec);
    max-width: 420px;
    margin: 0 auto 1.5rem;
    font-weight: 300;
}
.btn-reset {
    background: none;
    border: 1px solid var(--borde-hover);
    padding: 0.55rem 1.5rem;
    font-family: 'Exo 2', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--texto-sec);
    cursor: pointer;
    transition: var(--trans);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.btn-reset:hover { border-color: var(--verde); color: var(--verde-dk); }

/* ============================================================
   ERROR DB
============================================================ */
.db-error {
    background: #fff5f5;
    border: 1px solid #fca5a5;
    border-left: 3px solid #dc2626;
    padding: 1.2rem 1.5rem;
    color: #b91c1c;
    font-size: 1rem;
    margin: 2rem 0;
}

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 560px) {
    .scale-options { gap: 0.25rem; }
    .scale-label { padding: 0.5rem 0.3rem; min-width: 36px; }
    .site-header { padding: 1.5rem; }
    .acc-question { font-size: 1rem; }
}