/* =========================================================
   UNIDAD DE SALUD SANTA MÓNICA
   Sistema de Agendamiento de Citas Médicas
   Archivo: assets/css/styles.css
   Diseño responsive / mobile-first con identidad institucional
========================================================= */

/* =========================
   VARIABLES INSTITUCIONALES
========================= */
:root {
    --azul-institucional: #24417f;
    --azul-principal: #2f5f9f;
    --azul-medio: #4f79b7;
    --azul-pastel: #dcecf7;
    --azul-pastel-claro: #eef6fb;
    --azul-muy-claro: #f6f9fc;

    --blanco: #ffffff;
    --gris-fondo: #f4f7fa;
    --gris-texto: #5f7079;
    --gris-oscuro: #33444d;
    --gris-borde: #d4dee5;

    --verde-exito: #2e8b57;
    --amarillo-alerta: #d49a17;
    --rojo-error: #c74444;

    --radio-sm: 10px;
    --radio-md: 14px;
    --radio-lg: 20px;

    --sombra-suave: 0 10px 30px rgba(36, 65, 127, 0.08);
    --sombra-tarjeta: 0 14px 36px rgba(36, 65, 127, 0.12);

    --ancho-contenido: 1180px;
}

/* =========================
   REINICIO BÁSICO
========================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;

    font-family: Arial, Helvetica, sans-serif;

    background: var(--gris-fondo);
    color: var(--gris-oscuro);

    line-height: 1.5;
}

img {
    max-width: 100%;
    height: auto;
}

button,
input,
select {
    font: inherit;
}

button,
select {
    cursor: pointer;
}

/* =========================
   ENCABEZADO
========================= */
.header {
    background: var(--blanco);
    border-bottom: 1px solid var(--gris-borde);
}

.header-content {
    width: 100%;
    max-width: var(--ancho-contenido);

    margin: 0 auto;
    padding: 14px 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 18px;
}

.brand-logo {
    display: block;
    width: 145px;
    height: auto;

    flex-shrink: 0;
}

.brand-text {
    min-width: 0;
}

.brand-text h1 {
    margin: 0;

    color: var(--azul-institucional);

    font-size: 20px;
    font-weight: 700;
    line-height: 1.2;
}

.brand-text p {
    margin-top: 4px;

    color: var(--gris-texto);

    font-size: 13px;
    line-height: 1.35;
}

/* Compatibilidad temporal por si todavía existe
   alguna referencia anterior a .brand-icon */
.brand-icon {
    width: 48px;
    height: 48px;

    display: flex;
    align-items: center;
    justify-content: center;

    flex-shrink: 0;

    border-radius: 12px;

    background: var(--azul-institucional);
    color: var(--blanco);

    font-size: 30px;
    font-weight: 700;
}

/* =========================
   CONTENIDO PRINCIPAL
========================= */
.main {
    width: 100%;
    max-width: var(--ancho-contenido);

    margin: 0 auto;
    padding: 56px 24px 48px;
}

.welcome {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(380px, 460px);
    gap: 64px;
    align-items: center;

    min-height: calc(100dvh - 205px);
}

.welcome-text {
    min-width: 0;
}

.badge {
    display: inline-block;

    margin-bottom: 18px;
    padding: 7px 14px;

    border-radius: 999px;

    background: var(--azul-pastel);
    color: var(--azul-institucional);

    font-size: 14px;
    font-weight: 700;
}

.welcome-text h2 {
    max-width: 620px;

    color: var(--azul-institucional);

    font-size: clamp(34px, 4vw, 46px);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.5px;
}

.welcome-text p {
    max-width: 620px;

    margin-top: 20px;

    color: var(--gris-texto);

    font-size: 18px;
    line-height: 1.65;
}

/* =========================
   TARJETA DE VALIDACIÓN
========================= */
.validation-card {
    width: 100%;

    padding: 30px;

    border: 1px solid rgba(36, 65, 127, 0.08);
    border-radius: var(--radio-lg);

    background: var(--blanco);

    box-shadow: var(--sombra-tarjeta);
}

.card-header {
    margin-bottom: 24px;
}

.card-header h3 {
    color: var(--azul-institucional);

    font-size: 24px;
    font-weight: 700;
    line-height: 1.2;
}

.card-header p {
    margin-top: 8px;

    color: var(--gris-texto);

    font-size: 15px;
    line-height: 1.5;
}

/* =========================
   FORMULARIO
========================= */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;

    margin-bottom: 7px;

    color: var(--gris-oscuro);

    font-size: 14px;
    font-weight: 700;
}

.form-group input,
.form-group select {
    width: 100%;
    min-height: 50px;

    padding: 12px 14px;

    border: 1px solid var(--gris-borde);
    border-radius: var(--radio-sm);

    outline: none;

    background: var(--blanco);
    color: var(--gris-oscuro);

    font-size: 16px;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease,
        background-color 0.2s ease;
}

.form-group input::placeholder {
    color: #87969e;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--azul-principal);

    box-shadow:
        0 0 0 3px rgba(47, 95, 159, 0.12);
}

.form-group input:disabled,
.form-group select:disabled {
    cursor: not-allowed;

    background: #f0f3f5;
    color: #8b989f;
}

/* =========================
   BOTONES
========================= */
.btn-primary {
    width: 100%;
    min-height: 52px;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 13px 18px;

    border: 0;
    border-radius: var(--radio-sm);

    background: var(--azul-institucional);
    color: var(--blanco);

    font-size: 16px;
    font-weight: 700;

    cursor: pointer;

    transition:
        background-color 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.btn-primary:hover {
    background: var(--azul-principal);

    transform: translateY(-1px);

    box-shadow:
        0 8px 18px rgba(36, 65, 127, 0.16);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:focus-visible {
    outline: 3px solid rgba(79, 121, 183, 0.28);
    outline-offset: 2px;
}

/* =========================
   PROTECCIÓN DE DATOS
========================= */
.privacy-note {
    margin-top: 22px;
    padding: 14px 15px;

    border-left: 4px solid var(--azul-principal);
    border-radius: var(--radio-sm);

    background: var(--azul-pastel-claro);
    color: var(--gris-texto);

    font-size: 13px;
    line-height: 1.5;
}

.privacy-note strong {
    color: var(--azul-institucional);
}

.privacy-note p {
    margin-top: 4px;
}

/* =========================
   PIE DE PÁGINA
========================= */
.footer {
    padding: 22px 20px 28px;

    text-align: center;

    color: #75858d;

    font-size: 12px;
    line-height: 1.45;
}

.footer p + p {
    margin-top: 4px;
}

/* =========================
   MENSAJES FUTUROS
   Ya quedan preparados para
   la conexión con la BD
========================= */
.alert {
    margin-bottom: 18px;
    padding: 12px 14px;

    border-radius: var(--radio-sm);

    font-size: 14px;
    line-height: 1.45;
}

.alert-success {
    border: 1px solid rgba(46, 139, 87, 0.25);

    background: rgba(46, 139, 87, 0.09);
    color: #236b45;
}

.alert-warning {
    border: 1px solid rgba(212, 154, 23, 0.28);

    background: rgba(212, 154, 23, 0.10);
    color: #805d12;
}

.alert-error {
    border: 1px solid rgba(199, 68, 68, 0.25);

    background: rgba(199, 68, 68, 0.08);
    color: #913333;
}

/* =========================================================
   TABLET Y TELÉFONOS
========================================================= */
@media (max-width: 900px) {

    body {
        background: var(--blanco);
    }

    .header {
        position: sticky;
        top: 0;
        z-index: 1000;

        background: rgba(255, 255, 255, 0.97);

        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
    }

    .header-content {
        padding: 11px 18px;
    }

    .brand {
        gap: 12px;
    }

    .brand-logo {
        width: 115px;
    }

    .brand-text h1 {
        font-size: 16px;
    }

    .brand-text p {
        margin-top: 2px;
        font-size: 11px;
    }

    .brand-icon {
        width: 42px;
        height: 42px;

        border-radius: 11px;

        font-size: 26px;
    }

    .main {
        max-width: none;
        padding: 0;
    }

    .welcome {
        display: block;

        min-height: auto;
    }

    .welcome-text {
        padding: 32px 22px 26px;

        background:
            linear-gradient(
                180deg,
                var(--azul-pastel-claro) 0%,
                var(--blanco) 100%
            );
    }

    .badge {
        margin-bottom: 13px;

        padding: 6px 12px;

        font-size: 12px;
    }

    .welcome-text h2 {
        max-width: none;

        font-size: 30px;
        line-height: 1.15;
    }

    .welcome-text p {
        max-width: none;

        margin-top: 14px;

        font-size: 15px;
        line-height: 1.55;
    }

    .validation-card {
        max-width: none;

        margin: 0;

        padding: 28px 22px 34px;

        border-right: 0;
        border-bottom: 0;
        border-left: 0;

        border-radius: 24px 24px 0 0;

        box-shadow:
            0 -8px 30px rgba(36, 65, 127, 0.08);
    }

    .card-header {
        margin-bottom: 22px;
    }

    .card-header h3 {
        font-size: 22px;
    }

    .card-header p {
        font-size: 14px;
    }

    .form-group {
        margin-bottom: 17px;
    }

    .form-group label {
        margin-bottom: 6px;

        font-size: 14px;
    }

    .form-group input,
    .form-group select {
        min-height: 52px;

        border-radius: 12px;

        padding: 13px 14px;

        font-size: 16px;
    }

    .btn-primary {
        min-height: 52px;

        margin-top: 3px;

        border-radius: 12px;
    }

    .privacy-note {
        margin-top: 20px;

        border-radius: 12px;

        font-size: 12px;
    }

    .footer {
        padding: 22px 18px 26px;

        background: var(--blanco);

        font-size: 11px;
    }
}

/* =========================================================
   TELÉFONOS PEQUEÑOS
========================================================= */
@media (max-width: 480px) {

    .header-content {
        padding: 9px 14px;
    }

    .brand {
        gap: 9px;
    }

    .brand-logo {
        width: 94px;
    }

    .brand-text h1 {
        font-size: 14px;
    }

    .brand-text p {
        font-size: 10px;
        line-height: 1.25;
    }

    .brand-icon {
        width: 38px;
        height: 38px;

        font-size: 23px;
    }

    .welcome-text {
        padding: 25px 18px 22px;
    }

    .welcome-text h2 {
        font-size: 27px;
    }

    .welcome-text p {
        font-size: 14px;
    }

    .validation-card {
        padding: 25px 18px 30px;
    }

    .card-header h3 {
        font-size: 21px;
    }

    .privacy-note {
        padding: 13px;
    }
}

/* =========================================================
   TELÉFONOS MUY PEQUEÑOS
========================================================= */
@media (max-width: 360px) {

    .brand-logo {
        width: 82px;
    }

    .brand-text h1 {
        font-size: 13px;
    }

    .brand-text p {
        font-size: 9px;
    }

    .welcome-text h2 {
        font-size: 24px;
    }

    .validation-card {
        padding-right: 15px;
        padding-left: 15px;
    }
}

/* =========================================================
   ACCESIBILIDAD
========================================================= */
@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}